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7 years agouuid,afs: move struct uuid_v1 back into afs
Christoph Hellwig [Sun, 28 May 2017 05:56:46 +0000 (08:56 +0300)]
uuid,afs: move struct uuid_v1 back into afs

This essentially is a partial revert of commit ff548773
("afs: Move UUID struct to linux/uuid.h") and moves struct uuid_v1 back into
fs/afs as struct afs_uuid.  It however keeps it as big endian structure
so that we can use the normal uuid generation helpers when casting to/from
struct afs_uuid.

The V1 uuid intrepretation in struct form isn't really useful to the
rest of the kernel, and not really compatible to it either, so move it
back to AFS instead of polluting the global uuid.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David Howells <dhowells@redhat.com>
7 years agoLinux 4.12-rc4
Linus Torvalds [Sun, 4 Jun 2017 23:47:43 +0000 (16:47 -0700)]
Linux 4.12-rc4

7 years agofs/ufs: Set UFS default maximum bytes per file
Richard Narron [Sun, 4 Jun 2017 23:23:18 +0000 (16:23 -0700)]
fs/ufs: Set UFS default maximum bytes per file

This fixes a problem with reading files larger than 2GB from a UFS-2
file system:

    https://bugzilla.kernel.org/show_bug.cgi?id=195721

The incorrect UFS s_maxsize limit became a problem as of commit
c2a9737f45e2 ("vfs,mm: fix a dead loop in truncate_inode_pages_range()")
which started using s_maxbytes to avoid a page index overflow in
do_generic_file_read().

That caused files to be truncated on UFS-2 file systems because the
default maximum file size is 2GB (MAX_NON_LFS) and UFS didn't update it.

Here I simply increase the default to a common value used by other file
systems.

Signed-off-by: Richard Narron <comet.berkeley@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Will B <will.brokenbourgh2877@gmail.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: <stable@vger.kernel.org> # v4.9 and backports of c2a9737f45e2
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge tag 'nfs-for-4.12-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Sun, 4 Jun 2017 18:56:53 +0000 (11:56 -0700)]
Merge tag 'nfs-for-4.12-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Bugfixes include:

   - Fix a typo in commit e092693443b ("NFS append COMMIT after
     synchronous COPY") that breaks copy offload

   - Fix the connect error propagation in xs_tcp_setup_socket()

   - Fix a lock leak in nfs40_walk_client_list

   - Verify that pNFS requests lie within the offset range of the layout
     segment"

* tag 'nfs-for-4.12-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: Mark unnecessarily extern functions as static
  SUNRPC: ensure correct error is reported by xs_tcp_setup_socket()
  NFSv4.0: Fix a lock leak in nfs40_walk_client_list
  pnfs: Fix the check for requests in range of layout segment
  xprtrdma: Delete an error message for a failed memory allocation in xprt_rdma_bc_setup()
  pNFS/flexfiles: missing error code in ff_layout_alloc_lseg()
  NFS fix COMMIT after COPY

7 years agoMerge tag 'tty-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sun, 4 Jun 2017 18:41:41 +0000 (11:41 -0700)]
Merge tag 'tty-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty fix from Greg KH:
 "Here is a single tty core fix for 4.12-rc4. It reverts a patch that a
  lot of people reported as causing lockdep and other warnings.

  Right after I reverted this in my tree, it seems like another
  "correct" fix might have shown up, but it's too late in the release
  cycle to be messing with tty core locking, so let's just revert this
  for now to go back how things always have been and try it again for
  4.13.

  This has not been in linux-next as I only reverted it a few hours ago"

* tag 'tty-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "tty: fix port buffer locking"

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sun, 4 Jun 2017 18:37:42 +0000 (11:37 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input subsystem fixes from Dmitry Torokhov:

 - a couple of regression fixes in synaptics and axp20x-pek drivers

 - try to ease transition from PS/2 to RMI for Synaptics touchpad users
   by ensuring we do not try to activate RMI mode when RMI SMBus support
   is not enabled, and nag users a bit to enable it

 - plus a couple of other changes that seemed worthwhile for this
   release

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: axp20x-pek - switch to acpi_dev_present and check for ACPI0011 too
  Input: axp20x-pek - only check for "INTCFD9" ACPI device on Cherry Trail
  Input: tm2-touchkey - use LEN_ON as boolean value instead of LED_FULL
  Input: synaptics - tell users to report when they should be using rmi-smbus
  Input: synaptics - warn the users when there is a better mode
  Input: synaptics - keep PS/2 around when RMI4_SMB is not enabled
  Input: synaptics - clear device info before filling in
  Input: silead - disable interrupt during suspend

7 years agoMerge tag 'rtc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni...
Linus Torvalds [Sun, 4 Jun 2017 18:29:32 +0000 (11:29 -0700)]
Merge tag 'rtc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC fixlet from Alexandre Belloni:
 "A single patch, not really a fix but I don't think there is any reason
  to delay it.

  Change the mailing list address"

* tag 'rtc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  MAINTAINERS: update RTC mailing list

7 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 4 Jun 2017 18:15:43 +0000 (11:15 -0700)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is nine fixes, seven of which are for the qedi driver (new as of
  4.10) the other two are a use after free in the cxgbi drivers and a
  potential NULL dereference in the rdac device handler"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: libcxgbi: fix skb use after free
  scsi: qedi: Fix endpoint NULL panic during recovery.
  scsi: qedi: set max_fin_rt default value
  scsi: qedi: Set firmware tcp msl timer value.
  scsi: qedi: Fix endpoint NULL panic in qedi_set_path.
  scsi: qedi: Set dma_boundary to 0xfff.
  scsi: qedi: Correctly set firmware max supported BDs.
  scsi: qedi: Fix bad pte call trace when iscsiuio is stopped.
  scsi: scsi_dh_rdac: Use ctlr directly in rdac_failover_get()

7 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sun, 4 Jun 2017 17:41:32 +0000 (10:41 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "For the most part this is just a minor -rc cycle for the rdma
  subsystem. Even given that this is all of the -rc patches since the
  merge window closed, it's still only about 25 patches:

   - Multiple i40iw, nes, iw_cxgb4, hfi1, qib, mlx4, mlx5 fixes

   - A few upper layer protocol fixes (IPoIB, iSER, SRP)

   - A modest number of core fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (26 commits)
  RDMA/SA: Fix kernel panic in CMA request handler flow
  RDMA/umem: Fix missing mmap_sem in get umem ODP call
  RDMA/core: not to set page dirty bit if it's already set.
  RDMA/uverbs: Declare local function static and add brackets to sizeof
  RDMA/netlink: Reduce exposure of RDMA netlink functions
  RDMA/srp: Fix NULL deref at srp_destroy_qp()
  RDMA/IPoIB: Limit the ipoib_dev_uninit_default scope
  RDMA/IPoIB: Replace netdev_priv with ipoib_priv for ipoib_get_link_ksettings
  RDMA/qedr: add null check before pointer dereference
  RDMA/mlx5: set UMR wqe fence according to HCA cap
  net/mlx5: Define interface bits for fencing UMR wqe
  RDMA/mlx4: Fix MAD tunneling when SRIOV is enabled
  RDMA/qib,hfi1: Fix MR reference count leak on write with immediate
  RDMA/hfi1: Defer setting VL15 credits to link-up interrupt
  RDMA/hfi1: change PCI bar addr assignments to Linux API functions
  RDMA/hfi1: fix array termination by appending NULL to attr array
  RDMA/iw_cxgb4: fix the calculation of ipv6 header size
  RDMA/iw_cxgb4: calculate t4_eq_status_entries properly
  RDMA/iw_cxgb4: Avoid touch after free error in ARP failure handlers
  RDMA/nes: ACK MPA Reply frame
  ...

7 years agoRevert "tty: fix port buffer locking"
Greg Kroah-Hartman [Sun, 4 Jun 2017 08:23:25 +0000 (10:23 +0200)]
Revert "tty: fix port buffer locking"

This reverts commit 925bb1ce47f429f69aad35876df7ecd8c53deb7e.

It causes lots of warnings and problems so for now, let's just revert
it.

Reported-by: <valdis.kletnieks@vt.edu>
Reported-by: Russell King <linux@armlinux.org.uk>
Reported-by: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
7 years agonfs: Mark unnecessarily extern functions as static
Jan Kara [Tue, 16 May 2017 10:18:11 +0000 (12:18 +0200)]
nfs: Mark unnecessarily extern functions as static

nfs_initialise_sb() and nfs_clone_super() are declared as extern even
though they are used only in fs/nfs/super.c. Mark them as static.

Also remove explicit 'inline' directive from nfs_initialise_sb() and
leave it upto compiler to decide whether inlining is worth it.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
7 years agoMerge tag 'hwmon-for-linus-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 3 Jun 2017 15:45:03 +0000 (08:45 -0700)]
Merge tag 'hwmon-for-linus-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
 "A couple of patches for the aspeed pwm fan driver"

* tag 'hwmon-for-linus-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (aspeed-pwm-tacho) make fan/pwm names start with index 1
  hwmon: (aspeed-pwm-tacho) Call of_node_put() on a node not claimed
  hwmon: (aspeed-pwm-tacho) On read failure return -ETIMEDOUT
  hwmon: (aspeed-pwm-tacho) Select REGMAP

7 years agoMerge tag 'for-linus-20170602' of git://git.infradead.org/linux-mtd
Linus Torvalds [Sat, 3 Jun 2017 15:42:30 +0000 (08:42 -0700)]
Merge tag 'for-linus-20170602' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Brian Norris:
 "NAND updates from Boris:

  tango fixes:
   - Add missing MODULE_DEVICE_TABLE() in tango_nand.c
   - Update the number of corrected bitflips

  core fixes:
   - Fix a long standing memory leak in nand_scan_tail()
   - Fix several bugs introduced by the per-vendor init/detection
     infrastructure (introduced in 4.12)
   - Add a static specifier to nand_ooblayout_lp_hamming_ops definition"

* tag 'for-linus-20170602' of git://git.infradead.org/linux-mtd:
  mtd: nand: make nand_ooblayout_lp_hamming_ops static
  mtd: nand: tango: Update ecc_stats.corrected
  mtd: nand: tango: Export OF device ID table as module aliases
  mtd: nand: samsung: warn about un-parseable ECC info
  mtd: nand: free vendor-specific resources in init failure paths
  mtd: nand: drop unneeded module.h include
  mtd: nand: don't leak buffers when ->scan_bbt() fails

7 years agohwmon: (aspeed-pwm-tacho) make fan/pwm names start with index 1
Stefan Schaeckeler [Fri, 2 Jun 2017 19:43:28 +0000 (12:43 -0700)]
hwmon: (aspeed-pwm-tacho) make fan/pwm names start with index 1

Make fan and pwm names in sysfs start with index 1 in accordance to
Documentation/hwmon/sysfs-interface conventions.

Current implementation starts with index 0, making tools such as
sensors(1) skip the first fan.

Signed-off-by: Stefan Schaeckeler <sschaeck@cisco.com>
Fixes: 2d7a548a3eff ("drivers: hwmon: Support for ASPEED PWM/Fan tach")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
7 years agohwmon: (aspeed-pwm-tacho) Call of_node_put() on a node not claimed
Stefan Schaeckeler [Fri, 2 Jun 2017 19:42:08 +0000 (12:42 -0700)]
hwmon: (aspeed-pwm-tacho) Call of_node_put() on a node not claimed

Call of_node_put() on a node claimed with of_node_get() or by any other
means such as for_each_child_of_node().

Signed-off-by: Stefan Schaeckeler <sschaeck@cisco.com>
Fixes: 2d7a548a3eff ("drivers: hwmon: Support for ASPEED PWM/Fan tach")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
7 years agoInput: axp20x-pek - switch to acpi_dev_present and check for ACPI0011 too
Hans de Goede [Sat, 3 Jun 2017 00:50:22 +0000 (17:50 -0700)]
Input: axp20x-pek - switch to acpi_dev_present and check for ACPI0011 too

acpi_dev_found checks that there is a matching ACPI node, but it
may be disabled (_STA method returns 0) in which case the
soc_button_array driver will not bind to it and axp20x-pek should
handle the power-button.

This commit switches from acpi_dev_found to acpi_dev_present to
avoid not registering an input-dev for the powerbutton when there
is a disabled PNP0C40 device.

The ACPI-6.0 standard defines a standard gpio button device using
the ACPI0011 HID replacing the custom PNP0C40 gpio device, many
newer devices define both PNP0C40 and ACPI0011 devices enabling one
or the other depending on whether the BIOS thinks it is going to boot
Android or Windows.

This commit adds a check for the ACPI0011 device, so that if
either device is present *and* enabled we don't register an input-dev
for the powerbutton.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
7 years agoInput: axp20x-pek - only check for "INTCFD9" ACPI device on Cherry Trail
Hans de Goede [Sat, 3 Jun 2017 00:18:47 +0000 (17:18 -0700)]
Input: axp20x-pek - only check for "INTCFD9" ACPI device on Cherry Trail

Commit 9b13a4ca8d2c ("Input: axp20x-pek - do not register input device
on some systems") added a check for the INTCFD9 ACPI device which also
handles the powerbutton as on some systems the powerbutton is connected
to both the PMIC, handled by axp20x-pek, and to a gpio on the SoC, handled
by soc_button_array which attaches itself to the INTCFD9 ACPI device.

Testing + comparing DSDTs has shown that this only happens on Cherry
Trail devices with an AXP288 PMIC, the AXP288 PMIC is also used on
Bay Trail devices but there the power button is only connected to
the PMIC and not handled by soc_button_array.

This means that the INTCFD9 check has caused a regression on Bay Trail
devices, causing power-button presses to no longer be seen.

This commit fixes this by limiting the check to devices where the ACPI
node for the AXP288 contains a _HRV (hardware revision) attribute with
a value of 3 which indicates we are dealing with a Cherry Trail platform.

Fixes: 9b13a4ca8d2c ("Input: axp20x-pek - do not register input ...")
Reported-by: Сергей Трусов <t.rus76@ya.ru>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
7 years agoMerge tag 'v4.12-rc3' into for-linus
Dmitry Torokhov [Sat, 3 Jun 2017 00:49:10 +0000 (17:49 -0700)]
Merge tag 'v4.12-rc3' into for-linus

Merge with mainline to get acpi_dev_present() needed by patches to
axp20x-pek driver.

7 years agoMerge tag 'acpi-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 2 Jun 2017 23:36:23 +0000 (16:36 -0700)]
Merge tag 'acpi-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These revert one more problematic commit related to the ACPI-based
  handling of laptop lids and make some unuseful error messages coming
  from ACPICA go away.

  Specifics:

   - Revert one more commit related to the ACPI-based handling of laptop
     lids that changed the default behavior on laptops that booted with
     closed lids and introduced a regression there (Benjamin Tissoires).

   - Add a missing acpi_put_table() to the code implementing the
     /sys/firmware/acpi/tables interface to prevent a counter in the
     ACPICA core from overflowing (Dan Williams).

   - Drop error messages printed by ACPICA on acpi_get_table() reference
     counting mismatches as they need not indicate real errors at this
     point (Lv Zheng)"

* tag 'acpi-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: Tables: Fix regression introduced by a too early mechanism enabling
  Revert "ACPI / button: Change default behavior to lid_init_state=open"
  ACPI / sysfs: fix acpi_get_table() leak / acpi-sysfs denial of service

7 years agoMerge tag 'pm-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 2 Jun 2017 23:33:33 +0000 (16:33 -0700)]
Merge tag 'pm-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix two bugs in error code paths in the cpufreq core and in the
  kirkwood-cpufreq driver.

  Specifics:

   - Make cpufreq_register_driver() return an error if the ->init()
     calls fail for all CPUs to prevent non-functional drivers from
     hanging around for no reason (David Arcari).

   - Make kirkwood-cpufreq check the return value of
     clk_prepare_enable() (which may fail) as appropriate (Arvind
     Yadav)"

* tag 'pm-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: kirkwood-cpufreq:- Handle return value of clk_prepare_enable()
  cpufreq: cpufreq_register_driver() should return -ENODEV if init fails

7 years agoMerge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 2 Jun 2017 23:19:47 +0000 (16:19 -0700)]
Merge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

Pull /dev/random bug fix from Ted Ts'o:
 "Fix a race on architectures with prioritized interrupts (such as m68k)
  which can causes crashes in drivers/char/random.c:get_reg()"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  fix race in drivers/char/random.c:get_reg()

7 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Fri, 2 Jun 2017 22:49:46 +0000 (15:49 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "15 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  scripts/gdb: make lx-dmesg command work (reliably)
  mm: consider memblock reservations for deferred memory initialization sizing
  mm/hugetlb: report -EHWPOISON not -EFAULT when FOLL_HWPOISON is specified
  mlock: fix mlock count can not decrease in race condition
  mm/migrate: fix refcount handling when !hugepage_migration_supported()
  dax: fix race between colliding PMD & PTE entries
  mm: avoid spurious 'bad pmd' warning messages
  mm/page_alloc.c: make sure OOM victim can try allocations with no watermarks once
  pcmcia: remove left-over %Z format
  slub/memcg: cure the brainless abuse of sysfs attributes
  initramfs: fix disabling of initramfs (and its compression)
  mm: clarify why we want kmalloc before falling backto vmallock
  frv: declare jiffies to be located in the .data section
  include/linux/gfp.h: fix ___GFP_NOLOCKDEP value
  ksm: prevent crash after write_protect_page fails

7 years agoscripts/gdb: make lx-dmesg command work (reliably)
André Draszik [Fri, 2 Jun 2017 21:46:51 +0000 (14:46 -0700)]
scripts/gdb: make lx-dmesg command work (reliably)

lx-dmesg needs access to the log_buf symbol from printk.c.
Unfortunately, the symbol log_buf also exists in BPF's verifier.c and
hence gdb can pick one or the other.  If it happens to pick BPF's
log_buf, lx-dmesg doesn't work:

  (gdb) lx-dmesg
  Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0x0:
  Error occurred in Python command: Cannot access memory at address 0x0
  (gdb) p log_buf
  $15 = 0x0

Luckily, GDB has a way to deal with this, see
  https://sourceware.org/gdb/onlinedocs/gdb/Symbols.html

  (gdb) info variables ^log_buf$
  All variables matching regular expression "^log_buf$":

  File <linux.git>/kernel/bpf/verifier.c:
  static char *log_buf;

  File <linux.git>/kernel/printk/printk.c:
  static char *log_buf;
  (gdb) p 'verifier.c'::log_buf
  $1 = 0x0
  (gdb) p 'printk.c'::log_buf
  $2 = 0x811a6aa0 <__log_buf> ""
  (gdb) p &log_buf
  $3 = (char **) 0x8120fe40 <log_buf>
  (gdb) p &'verifier.c'::log_buf
  $4 = (char **) 0x8120fe40 <log_buf>
  (gdb) p &'printk.c'::log_buf
  $5 = (char **) 0x8048b7d0 <log_buf>

By being explicit about the location of the symbol, we can make lx-dmesg
work again.  While at it, do the same for the other symbols we need from
printk.c

Link: http://lkml.kernel.org/r/20170526112222.3414-1-git@andred.net
Signed-off-by: André Draszik <git@andred.net>
Tested-by: Kieran Bingham <kieran@bingham.xyz>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomm: consider memblock reservations for deferred memory initialization sizing
Michal Hocko [Fri, 2 Jun 2017 21:46:49 +0000 (14:46 -0700)]
mm: consider memblock reservations for deferred memory initialization sizing

We have seen an early OOM killer invocation on ppc64 systems with
crashkernel=4096M:

kthreadd invoked oom-killer: gfp_mask=0x16040c0(GFP_KERNEL|__GFP_COMP|__GFP_NOTRACK), nodemask=7, order=0, oom_score_adj=0
kthreadd cpuset=/ mems_allowed=7
CPU: 0 PID: 2 Comm: kthreadd Not tainted 4.4.68-1.gd7fe927-default #1
Call Trace:
  dump_stack+0xb0/0xf0 (unreliable)
  dump_header+0xb0/0x258
  out_of_memory+0x5f0/0x640
  __alloc_pages_nodemask+0xa8c/0xc80
  kmem_getpages+0x84/0x1a0
  fallback_alloc+0x2a4/0x320
  kmem_cache_alloc_node+0xc0/0x2e0
  copy_process.isra.25+0x260/0x1b30
  _do_fork+0x94/0x470
  kernel_thread+0x48/0x60
  kthreadd+0x264/0x330
  ret_from_kernel_thread+0x5c/0xa4

Mem-Info:
active_anon:0 inactive_anon:0 isolated_anon:0
 active_file:0 inactive_file:0 isolated_file:0
 unevictable:0 dirty:0 writeback:0 unstable:0
 slab_reclaimable:5 slab_unreclaimable:73
 mapped:0 shmem:0 pagetables:0 bounce:0
 free:0 free_pcp:0 free_cma:0
Node 7 DMA free:0kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:52428800kB managed:110016kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:320kB slab_unreclaimable:4672kB kernel_stack:1152kB pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
lowmem_reserve[]: 0 0 0 0
Node 7 DMA: 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB 0*16384kB = 0kB
0 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
819200 pages RAM
0 pages HighMem/MovableOnly
817481 pages reserved
0 pages cma reserved
0 pages hwpoisoned

the reason is that the managed memory is too low (only 110MB) while the
rest of the the 50GB is still waiting for the deferred intialization to
be done.  update_defer_init estimates the initial memoty to initialize
to 2GB at least but it doesn't consider any memory allocated in that
range.  In this particular case we've had

Reserving 4096MB of memory at 128MB for crashkernel (System RAM: 51200MB)

so the low 2GB is mostly depleted.

Fix this by considering memblock allocations in the initial static
initialization estimation.  Move the max_initialise to
reset_deferred_meminit and implement a simple memblock_reserved_memory
helper which iterates all reserved blocks and sums the size of all that
start below the given address.  The cumulative size is than added on top
of the initial estimation.  This is still not ideal because
reset_deferred_meminit doesn't consider holes and so reservation might
be above the initial estimation whihch we ignore but let's make the
logic simpler until we really need to handle more complicated cases.

Fixes: 3a80a7fa7989 ("mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set")
Link: http://lkml.kernel.org/r/20170531104010.GI27783@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> [4.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomm/hugetlb: report -EHWPOISON not -EFAULT when FOLL_HWPOISON is specified
James Morse [Fri, 2 Jun 2017 21:46:46 +0000 (14:46 -0700)]
mm/hugetlb: report -EHWPOISON not -EFAULT when FOLL_HWPOISON is specified

KVM uses get_user_pages() to resolve its stage2 faults.  KVM sets the
FOLL_HWPOISON flag causing faultin_page() to return -EHWPOISON when it
finds a VM_FAULT_HWPOISON.  KVM handles these hwpoison pages as a
special case.  (check_user_page_hwpoison())

When huge pages are involved, this doesn't work so well.
get_user_pages() calls follow_hugetlb_page(), which stops early if it
receives VM_FAULT_HWPOISON from hugetlb_fault(), eventually returning
-EFAULT to the caller.  The step to map this to -EHWPOISON based on the
FOLL_ flags is missing.  The hwpoison special case is skipped, and
-EFAULT is returned to user-space, causing Qemu or kvmtool to exit.

Instead, move this VM_FAULT_ to errno mapping code into a header file
and use it from faultin_page() and follow_hugetlb_page().

With this, KVM works as expected.

This isn't a problem for arm64 today as we haven't enabled
MEMORY_FAILURE, but I can't see any reason this doesn't happen on x86
too, so I think this should be a fix.  This doesn't apply earlier than
stable's v4.11.1 due to all sorts of cleanup.

[james.morse@arm.com: add vm_fault_to_errno() call to faultin_page()]
suggested.
Link: http://lkml.kernel.org/r/20170525171035.16359-1-james.morse@arm.com
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20170524160900.28786-1-james.morse@arm.com
Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org> [4.11.1+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomlock: fix mlock count can not decrease in race condition
Yisheng Xie [Fri, 2 Jun 2017 21:46:43 +0000 (14:46 -0700)]
mlock: fix mlock count can not decrease in race condition

Kefeng reported that when running the follow test, the mlock count in
meminfo will increase permanently:

 [1] testcase
 linux:~ # cat test_mlockal
 grep Mlocked /proc/meminfo
  for j in `seq 0 10`
  do
  for i in `seq 4 15`
  do
  ./p_mlockall >> log &
  done
  sleep 0.2
 done
 # wait some time to let mlock counter decrease and 5s may not enough
 sleep 5
 grep Mlocked /proc/meminfo

 linux:~ # cat p_mlockall.c
 #include <sys/mman.h>
 #include <stdlib.h>
 #include <stdio.h>

 #define SPACE_LEN 4096

 int main(int argc, char ** argv)
 {
  int ret;
  void *adr = malloc(SPACE_LEN);
  if (!adr)
  return -1;

  ret = mlockall(MCL_CURRENT | MCL_FUTURE);
  printf("mlcokall ret = %d\n", ret);

  ret = munlockall();
  printf("munlcokall ret = %d\n", ret);

  free(adr);
  return 0;
 }

In __munlock_pagevec() we should decrement NR_MLOCK for each page where
we clear the PageMlocked flag.  Commit 1ebb7cc6a583 ("mm: munlock: batch
NR_MLOCK zone state updates") has introduced a bug where we don't
decrement NR_MLOCK for pages where we clear the flag, but fail to
isolate them from the lru list (e.g.  when the pages are on some other
cpu's percpu pagevec).  Since PageMlocked stays cleared, the NR_MLOCK
accounting gets permanently disrupted by this.

Fix it by counting the number of page whose PageMlock flag is cleared.

Fixes: 1ebb7cc6a583 (" mm: munlock: batch NR_MLOCK zone state updates")
Link: http://lkml.kernel.org/r/1495678405-54569-1-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Reported-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Joern Engel <joern@logfs.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michel Lespinasse <walken@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: zhongjiang <zhongjiang@huawei.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomm/migrate: fix refcount handling when !hugepage_migration_supported()
Punit Agrawal [Fri, 2 Jun 2017 21:46:40 +0000 (14:46 -0700)]
mm/migrate: fix refcount handling when !hugepage_migration_supported()

On failing to migrate a page, soft_offline_huge_page() performs the
necessary update to the hugepage ref-count.

But when !hugepage_migration_supported() , unmap_and_move_hugepage()
also decrements the page ref-count for the hugepage.  The combined
behaviour leaves the ref-count in an inconsistent state.

This leads to soft lockups when running the overcommitted hugepage test
from mce-tests suite.

  Soft offlining pfn 0x83ed600 at process virtual address 0x400000000000
  soft offline: 0x83ed600: migration failed 1, type 1fffc00000008008 (uptodate|head)
  INFO: rcu_preempt detected stalls on CPUs/tasks:
   Tasks blocked on level-0 rcu_node (CPUs 0-7): P2715
    (detected by 7, t=5254 jiffies, g=963, c=962, q=321)
    thugetlb_overco R  running task        0  2715   2685 0x00000008
    Call trace:
      dump_backtrace+0x0/0x268
      show_stack+0x24/0x30
      sched_show_task+0x134/0x180
      rcu_print_detail_task_stall_rnp+0x54/0x7c
      rcu_check_callbacks+0xa74/0xb08
      update_process_times+0x34/0x60
      tick_sched_handle.isra.7+0x38/0x70
      tick_sched_timer+0x4c/0x98
      __hrtimer_run_queues+0xc0/0x300
      hrtimer_interrupt+0xac/0x228
      arch_timer_handler_phys+0x3c/0x50
      handle_percpu_devid_irq+0x8c/0x290
      generic_handle_irq+0x34/0x50
      __handle_domain_irq+0x68/0xc0
      gic_handle_irq+0x5c/0xb0

Address this by changing the putback_active_hugepage() in
soft_offline_huge_page() to putback_movable_pages().

This only triggers on systems that enable memory failure handling
(ARCH_SUPPORTS_MEMORY_FAILURE) but not hugepage migration
(!ARCH_ENABLE_HUGEPAGE_MIGRATION).

I imagine this wasn't triggered as there aren't many systems running
this configuration.

[akpm@linux-foundation.org: remove dead comment, per Naoya]
Link: http://lkml.kernel.org/r/20170525135146.32011-1-punit.agrawal@arm.com
Reported-by: Manoj Iyer <manoj.iyer@canonical.com>
Tested-by: Manoj Iyer <manoj.iyer@canonical.com>
Suggested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: <stable@vger.kernel.org> [3.14+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agodax: fix race between colliding PMD & PTE entries
Ross Zwisler [Fri, 2 Jun 2017 21:46:37 +0000 (14:46 -0700)]
dax: fix race between colliding PMD & PTE entries

We currently have two related PMD vs PTE races in the DAX code.  These
can both be easily triggered by having two threads reading and writing
simultaneously to the same private mapping, with the key being that
private mapping reads can be handled with PMDs but private mapping
writes are always handled with PTEs so that we can COW.

Here is the first race:

  CPU 0 CPU 1

  (private mapping write)
  __handle_mm_fault()
    create_huge_pmd() - FALLBACK
    handle_pte_fault()
      passes check for pmd_devmap()

(private mapping read)
__handle_mm_fault()
  create_huge_pmd()
    dax_iomap_pmd_fault() inserts PMD

      dax_iomap_pte_fault() does a PTE fault, but we already have a DAX PMD
         installed in our page tables at this spot.

Here's the second race:

  CPU 0 CPU 1

  (private mapping read)
  __handle_mm_fault()
    passes check for pmd_none()
    create_huge_pmd()
      dax_iomap_pmd_fault() inserts PMD

  (private mapping write)
  __handle_mm_fault()
    create_huge_pmd() - FALLBACK
(private mapping read)
__handle_mm_fault()
  passes check for pmd_none()
  create_huge_pmd()

    handle_pte_fault()
      dax_iomap_pte_fault() inserts PTE
    dax_iomap_pmd_fault() inserts PMD,
       but we already have a PTE at
       this spot.

The core of the issue is that while there is isolation between faults to
the same range in the DAX fault handlers via our DAX entry locking,
there is no isolation between faults in the code in mm/memory.c.  This
means for instance that this code in __handle_mm_fault() can run:

if (pmd_none(*vmf.pmd) && transparent_hugepage_enabled(vma)) {
ret = create_huge_pmd(&vmf);

But by the time we actually get to run the fault handler called by
create_huge_pmd(), the PMD is no longer pmd_none() because a racing PTE
fault has installed a normal PMD here as a parent.  This is the cause of
the 2nd race.  The first race is similar - there is the following check
in handle_pte_fault():

} else {
/* See comment in pte_alloc_one_map() */
if (pmd_devmap(*vmf->pmd) || pmd_trans_unstable(vmf->pmd))
return 0;

So if a pmd_devmap() PMD (a DAX PMD) has been installed at vmf->pmd, we
will bail and retry the fault.  This is correct, but there is nothing
preventing the PMD from being installed after this check but before we
actually get to the DAX PTE fault handlers.

In my testing these races result in the following types of errors:

  BUG: Bad rss-counter state mm:ffff8800a817d280 idx:1 val:1
  BUG: non-zero nr_ptes on freeing mm: 15

Fix this issue by having the DAX fault handlers verify that it is safe
to continue their fault after they have taken an entry lock to block
other racing faults.

[ross.zwisler@linux.intel.com: improve fix for colliding PMD & PTE entries]
Link: http://lkml.kernel.org/r/20170526195932.32178-1-ross.zwisler@linux.intel.com
Link: http://lkml.kernel.org/r/20170522215749.23516-2-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Pawel Lebioda <pawel.lebioda@intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Pawel Lebioda <pawel.lebioda@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Xiong Zhou <xzhou@redhat.com>
Cc: Eryu Guan <eguan@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomm: avoid spurious 'bad pmd' warning messages
Ross Zwisler [Fri, 2 Jun 2017 21:46:34 +0000 (14:46 -0700)]
mm: avoid spurious 'bad pmd' warning messages

When the pmd_devmap() checks were added by 5c7fb56e5e3f ("mm, dax:
dax-pmd vs thp-pmd vs hugetlbfs-pmd") to add better support for DAX huge
pages, they were all added to the end of if() statements after existing
pmd_trans_huge() checks.  So, things like:

  -       if (pmd_trans_huge(*pmd))
  +       if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd))

When further checks were added after pmd_trans_unstable() checks by
commit 7267ec008b5c ("mm: postpone page table allocation until we have
page to map") they were also added at the end of the conditional:

  +       if (pmd_trans_unstable(fe->pmd) || pmd_devmap(*fe->pmd))

This ordering is fine for pmd_trans_huge(), but doesn't work for
pmd_trans_unstable().  This is because DAX huge pages trip the bad_pmd()
check inside of pmd_none_or_trans_huge_or_clear_bad() (called by
pmd_trans_unstable()), which prints out a warning and returns 1.  So, we
do end up doing the right thing, but only after spamming dmesg with
suspicious looking messages:

  mm/pgtable-generic.c:39: bad pmd ffff8808daa49b88(84000001006000a5)

Reorder these checks in a helper so that pmd_devmap() is checked first,
avoiding the error messages, and add a comment explaining why the
ordering is important.

Fixes: commit 7267ec008b5c ("mm: postpone page table allocation until we have page to map")
Link: http://lkml.kernel.org/r/20170522215749.23516-1-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Pawel Lebioda <pawel.lebioda@intel.com>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Xiong Zhou <xzhou@redhat.com>
Cc: Eryu Guan <eguan@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomm/page_alloc.c: make sure OOM victim can try allocations with no watermarks once
Tetsuo Handa [Fri, 2 Jun 2017 21:46:31 +0000 (14:46 -0700)]
mm/page_alloc.c: make sure OOM victim can try allocations with no watermarks once

Roman Gushchin has reported that the OOM killer can trivially selects
next OOM victim when a thread doing memory allocation from page fault
path was selected as first OOM victim.

    allocate invoked oom-killer: gfp_mask=0x14280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), nodemask=(null),  order=0, oom_score_adj=0
    allocate cpuset=/ mems_allowed=0
    CPU: 1 PID: 492 Comm: allocate Not tainted 4.12.0-rc1-mm1+ #181
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
    Call Trace:
     oom_kill_process+0x219/0x3e0
     out_of_memory+0x11d/0x480
     __alloc_pages_slowpath+0xc84/0xd40
     __alloc_pages_nodemask+0x245/0x260
     alloc_pages_vma+0xa2/0x270
     __handle_mm_fault+0xca9/0x10c0
     handle_mm_fault+0xf3/0x210
     __do_page_fault+0x240/0x4e0
     trace_do_page_fault+0x37/0xe0
     do_async_page_fault+0x19/0x70
     async_page_fault+0x28/0x30
    ...
    Out of memory: Kill process 492 (allocate) score 899 or sacrifice child
    Killed process 492 (allocate) total-vm:2052368kB, anon-rss:1894576kB, file-rss:4kB, shmem-rss:0kB
    allocate: page allocation failure: order:0, mode:0x14280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), nodemask=(null)
    allocate cpuset=/ mems_allowed=0
    CPU: 1 PID: 492 Comm: allocate Not tainted 4.12.0-rc1-mm1+ #181
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
    Call Trace:
     __alloc_pages_slowpath+0xd32/0xd40
     __alloc_pages_nodemask+0x245/0x260
     alloc_pages_vma+0xa2/0x270
     __handle_mm_fault+0xca9/0x10c0
     handle_mm_fault+0xf3/0x210
     __do_page_fault+0x240/0x4e0
     trace_do_page_fault+0x37/0xe0
     do_async_page_fault+0x19/0x70
     async_page_fault+0x28/0x30
    ...
    oom_reaper: reaped process 492 (allocate), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
    ...
    allocate invoked oom-killer: gfp_mask=0x0(), nodemask=(null),  order=0, oom_score_adj=0
    allocate cpuset=/ mems_allowed=0
    CPU: 1 PID: 492 Comm: allocate Not tainted 4.12.0-rc1-mm1+ #181
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
    Call Trace:
     oom_kill_process+0x219/0x3e0
     out_of_memory+0x11d/0x480
     pagefault_out_of_memory+0x68/0x80
     mm_fault_error+0x8f/0x190
     ? handle_mm_fault+0xf3/0x210
     __do_page_fault+0x4b2/0x4e0
     trace_do_page_fault+0x37/0xe0
     do_async_page_fault+0x19/0x70
     async_page_fault+0x28/0x30
    ...
    Out of memory: Kill process 233 (firewalld) score 10 or sacrifice child
    Killed process 233 (firewalld) total-vm:246076kB, anon-rss:20956kB, file-rss:0kB, shmem-rss:0kB

There is a race window that the OOM reaper completes reclaiming the
first victim's memory while nothing but mutex_trylock() prevents the
first victim from calling out_of_memory() from pagefault_out_of_memory()
after memory allocation for page fault path failed due to being selected
as an OOM victim.

This is a side effect of commit 9a67f6488eca926f ("mm: consolidate
GFP_NOFAIL checks in the allocator slowpath") because that commit
silently changed the behavior from

    /* Avoid allocations with no watermarks from looping endlessly */

to

    /*
     * Give up allocations without trying memory reserves if selected
     * as an OOM victim
     */

in __alloc_pages_slowpath() by moving the location to check TIF_MEMDIE
flag.  I have noticed this change but I didn't post a patch because I
thought it is an acceptable change other than noise by warn_alloc()
because !__GFP_NOFAIL allocations are allowed to fail.  But we
overlooked that failing memory allocation from page fault path makes
difference due to the race window explained above.

While it might be possible to add a check to pagefault_out_of_memory()
that prevents the first victim from calling out_of_memory() or remove
out_of_memory() from pagefault_out_of_memory(), changing
pagefault_out_of_memory() does not suppress noise by warn_alloc() when
allocating thread was selected as an OOM victim.  There is little point
with printing similar backtraces and memory information from both
out_of_memory() and warn_alloc().

Instead, if we guarantee that current thread can try allocations with no
watermarks once when current thread looping inside
__alloc_pages_slowpath() was selected as an OOM victim, we can follow "who
can use memory reserves" rules and suppress noise by warn_alloc() and
prevent memory allocations from page fault path from calling
pagefault_out_of_memory().

If we take the comment literally, this patch would do

  -    if (test_thread_flag(TIF_MEMDIE))
  -        goto nopage;
  +    if (alloc_flags == ALLOC_NO_WATERMARKS || (gfp_mask & __GFP_NOMEMALLOC))
  +        goto nopage;

because gfp_pfmemalloc_allowed() returns false if __GFP_NOMEMALLOC is
given.  But if I recall correctly (I couldn't find the message), the
condition is meant to apply to only OOM victims despite the comment.
Therefore, this patch preserves TIF_MEMDIE check.

Fixes: 9a67f6488eca926f ("mm: consolidate GFP_NOFAIL checks in the allocator slowpath")
Link: http://lkml.kernel.org/r/201705192112.IAF69238.OQOHSJLFOFFMtV@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: Roman Gushchin <guro@fb.com>
Tested-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org> [4.11]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agopcmcia: remove left-over %Z format
Nicolas Iooss [Fri, 2 Jun 2017 21:46:28 +0000 (14:46 -0700)]
pcmcia: remove left-over %Z format

Commit 5b5e0928f742 ("lib/vsprintf.c: remove %Z support") removed some
usages of format %Z but forgot "%.2Zx".  This makes clang 4.0 reports a
-Wformat-extra-args warning because it does not know about %Z.

Replace %Z with %z.

Link: http://lkml.kernel.org/r/20170520090946.22562-1-nicolas.iooss_linux@m4x.org
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Harald Welte <laforge@gnumonks.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: <stable@vger.kernel.org> [4.11+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoslub/memcg: cure the brainless abuse of sysfs attributes
Thomas Gleixner [Fri, 2 Jun 2017 21:46:25 +0000 (14:46 -0700)]
slub/memcg: cure the brainless abuse of sysfs attributes

memcg_propagate_slab_attrs() abuses the sysfs attribute file functions
to propagate settings from the root kmem_cache to a newly created
kmem_cache.  It does that with:

     attr->show(root, buf);
     attr->store(new, buf, strlen(bug);

Aside of being a lazy and absurd hackery this is broken because it does
not check the return value of the show() function.

Some of the show() functions return 0 w/o touching the buffer.  That
means in such a case the store function is called with the stale content
of the previous show().  That causes nonsense like invoking
kmem_cache_shrink() on a newly created kmem_cache.  In the worst case it
would cause handing in an uninitialized buffer.

This should be rewritten proper by adding a propagate() callback to
those slub_attributes which must be propagated and avoid that insane
conversion to and from ASCII, but that's too large for a hot fix.

Check at least the return value of the show() function, so calling
store() with stale content is prevented.

Steven said:
 "It can cause a deadlock with get_online_cpus() that has been uncovered
  by recent cpu hotplug and lockdep changes that Thomas and Peter have
  been doing.

     Possible unsafe locking scenario:

           CPU0                    CPU1
           ----                    ----
      lock(cpu_hotplug.lock);
                                   lock(slab_mutex);
                                   lock(cpu_hotplug.lock);
      lock(slab_mutex);

     *** DEADLOCK ***"

Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1705201244540.2255@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoinitramfs: fix disabling of initramfs (and its compression)
Florian Fainelli [Fri, 2 Jun 2017 21:46:22 +0000 (14:46 -0700)]
initramfs: fix disabling of initramfs (and its compression)

Commit db2aa7fd15e8 ("initramfs: allow again choice of the embedded
initram compression algorithm") introduced the possibility to select the
initramfs compression algorithm from Kconfig and while this is a nice
feature it broke the use case described below.

Here is what my build system does:

 - kernel is initially configured not to have an initramfs included

 - build the user space root file system

 - re-configure the kernel to have an initramfs included
   (CONFIG_INITRAMFS_SOURCE="/path/to/romfs") and set relevant
   CONFIG_INITRAMFS options, in my case, no compression option
   (CONFIG_INITRAMFS_COMPRESSION_NONE)

 - kernel is re-built with these options -> kernel+initramfs image is
   copied

 - kernel is re-built again without these options -> kernel image is
   copied

Building a kernel without an initramfs means setting this option:

  CONFIG_INITRAMFS_SOURCE="" (and this one only)

whereas building a kernel with an initramfs means setting these options:

  CONFIG_INITRAMFS_SOURCE="/home/fainelli/work/uclinux-rootfs/romfs /home/fainelli/work/uclinux-rootfs/misc/initramfs.dev"
  CONFIG_INITRAMFS_ROOT_UID=1000
  CONFIG_INITRAMFS_ROOT_GID=1000
  CONFIG_INITRAMFS_COMPRESSION_NONE=y
  CONFIG_INITRAMFS_COMPRESSION=""

Commit db2aa7fd15e85 ("initramfs: allow again choice of the embedded
initram compression algorithm") is problematic because
CONFIG_INITRAMFS_COMPRESSION which is used to determine the
initramfs_data.cpio extension/compression is a string, and due to how
Kconfig works it will evaluate in order, how to assign it.

Setting CONFIG_INITRAMFS_COMPRESSION_NONE with CONFIG_INITRAMFS_SOURCE=""
cannot possibly work (because of the depends on INITRAMFS_SOURCE!=""
imposed on CONFIG_INITRAMFS_COMPRESSION ) yet we still get
CONFIG_INITRAMFS_COMPRESSION assigned to ".gz" because CONFIG_RD_GZIP=y
is set in my kernel, even when there is no initramfs being built.

So we basically end-up generating two initramfs_data.cpio* files, one
without extension, and one with .gz.  This causes usr/Makefile to track
usr/initramfs_data.cpio.gz, and not usr/initramfs_data.cpio anymore,
that is also largely problematic after 9e3596b0c6539e ("kbuild:
initramfs cleanup, set target from Kconfig") because we used to track
all possible initramfs_data files in the $(targets) variable before that
commit.

The end result is that the kernel with an initramfs clearly does not
contain what we expect it to, it has a stale initramfs_data.cpio file
built into it, and we keep re-generating an initramfs_data.cpio.gz file
which is not the one that we want to include in the kernel image proper.

The fix consists in hiding CONFIG_INITRAMFS_COMPRESSION when
CONFIG_INITRAMFS_SOURCE="".  This puts us back in a state to the
pre-4.10 behavior where we can properly disable and re-enable initramfs
within the same kernel .config file, and be in control of what
CONFIG_INITRAMFS_COMPRESSION is set to.

Fixes: db2aa7fd15e8 ("initramfs: allow again choice of the embedded initram compression algorithm")
Fixes: 9e3596b0c653 ("kbuild: initramfs cleanup, set target from Kconfig")
Link: http://lkml.kernel.org/r/20170521033337.6197-1-f.fainelli@gmail.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Cc: P J P <ppandit@redhat.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agomm: clarify why we want kmalloc before falling backto vmallock
Michal Hocko [Fri, 2 Jun 2017 21:46:19 +0000 (14:46 -0700)]
mm: clarify why we want kmalloc before falling backto vmallock

While converting drm_[cm]alloc* helpers to kvmalloc* variants Chris
Wilson has wondered why we want to try kmalloc before vmalloc fallback
even for larger allocations requests.  Let's clarify that one larger
physically contiguous block is less likely to fragment memory than many
scattered pages which can prevent more large blocks from being created.

[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20170517080932.21423-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agofrv: declare jiffies to be located in the .data section
Matthias Kaehlcke [Fri, 2 Jun 2017 21:46:16 +0000 (14:46 -0700)]
frv: declare jiffies to be located in the .data section

Commit 7c30f352c852 ("jiffies.h: declare jiffies and jiffies_64 with
____cacheline_aligned_in_smp") removed a section specification from the
jiffies declaration that caused conflicts on some platforms.

Unfortunately this change broke the build for frv:

  kernel/built-in.o: In function `__do_softirq': (.text+0x6460): relocation truncated to fit: R_FRV_GPREL12 against symbol
      `jiffies' defined in *ABS* section in .tmp_vmlinux1
  kernel/built-in.o: In function `__do_softirq': (.text+0x6574): relocation truncated to fit: R_FRV_GPREL12 against symbol
      `jiffies' defined in *ABS* section in .tmp_vmlinux1
  kernel/built-in.o: In function `pwq_activate_delayed_work': workqueue.c:(.text+0x15b9c): relocation truncated to fit: R_FRV_GPREL12 against
      symbol `jiffies' defined in *ABS* section in .tmp_vmlinux1
  ...

Add __jiffy_arch_data to the declaration of jiffies and use it on frv to
include the section specification.  For all other platforms
__jiffy_arch_data (currently) has no effect.

Fixes: 7c30f352c852 ("jiffies.h: declare jiffies and jiffies_64 with ____cacheline_aligned_in_smp")
Link: http://lkml.kernel.org/r/20170516221333.177280-1-mka@chromium.org
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoinclude/linux/gfp.h: fix ___GFP_NOLOCKDEP value
Michal Hocko [Fri, 2 Jun 2017 21:46:13 +0000 (14:46 -0700)]
include/linux/gfp.h: fix ___GFP_NOLOCKDEP value

Igor Stoppa has noticed that __GFP_NOLOCKDEP can use a lower bit.  At
the time commit 7e7844226f10 ("lockdep: allow to disable reclaim lockup
detection") was written we still had __GFP_OTHER_NODE but I have removed
it in commit 41b6167e8f74 ("mm: get rid of __GFP_OTHER_NODE") and forgot
to lower the bit value.

The current value is outside of __GFP_BITS_SHIFT so it cannot be used
actually.

Fixes: 7e7844226f10 ("lockdep: allow to disable reclaim lockup detection")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Igor Stoppa <igor.stoppa@nokia.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoksm: prevent crash after write_protect_page fails
Andrea Arcangeli [Fri, 2 Jun 2017 21:46:11 +0000 (14:46 -0700)]
ksm: prevent crash after write_protect_page fails

"err" needs to be left set to -EFAULT if split_huge_page succeeds.
Otherwise if "err" gets clobbered with zero and write_protect_page
fails, try_to_merge_one_page() will succeed instead of returning -EFAULT
and then try_to_merge_with_ksm_page() will continue thinking kpage is a
PageKsm when in fact it's still an anonymous page.  Eventually it'll
crash in page_add_anon_rmap.

This has been reproduced on Fedora25 kernel but I can reproduce with
upstream too.

The bug was introduced in commit f765f540598a ("ksm: prepare to new THP
semantics") introduced in v4.5.

    page:fffff67546ce1cc0 count:4 mapcount:2 mapping:ffffa094551e36e1 index:0x7f0f46673
    flags: 0x2ffffc0004007c(referenced|uptodate|dirty|lru|active|swapbacked)
    page dumped because: VM_BUG_ON_PAGE(!PageLocked(page))
    page->mem_cgroup:ffffa09674bf0000
    ------------[ cut here ]------------
    kernel BUG at mm/rmap.c:1222!
    CPU: 1 PID: 76 Comm: ksmd Not tainted 4.9.3-200.fc25.x86_64 #1
    RIP: do_page_add_anon_rmap+0x1c4/0x240
    Call Trace:
      page_add_anon_rmap+0x18/0x20
      try_to_merge_with_ksm_page+0x50b/0x780
      ksm_scan_thread+0x1211/0x1410
      ? prepare_to_wait_event+0x100/0x100
      ? try_to_merge_with_ksm_page+0x780/0x780
      kthread+0xd9/0xf0
      ? kthread_park+0x60/0x60
      ret_from_fork+0x25/0x30

Fixes: f765f54059 ("ksm: prepare to new THP semantics")
Link: http://lkml.kernel.org/r/20170513131040.21732-1-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Federico Simoncelli <fsimonce@redhat.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge branches 'acpi-button', 'acpica' and 'acpi-sysfs'
Rafael J. Wysocki [Fri, 2 Jun 2017 22:03:29 +0000 (00:03 +0200)]
Merge branches 'acpi-button', 'acpica' and 'acpi-sysfs'

* acpi-button:
  Revert "ACPI / button: Change default behavior to lid_init_state=open"

* acpica:
  ACPICA: Tables: Fix regression introduced by a too early mechanism enabling

* acpi-sysfs:
  ACPI / sysfs: fix acpi_get_table() leak / acpi-sysfs denial of service

7 years agoMerge branch 'pm-cpufreq'
Rafael J. Wysocki [Fri, 2 Jun 2017 22:01:45 +0000 (00:01 +0200)]
Merge branch 'pm-cpufreq'

* pm-cpufreq:
  cpufreq: kirkwood-cpufreq:- Handle return value of clk_prepare_enable()
  cpufreq: cpufreq_register_driver() should return -ENODEV if init fails

7 years agoMerge tag 'xfs-4.12-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Fri, 2 Jun 2017 19:29:03 +0000 (12:29 -0700)]
Merge tag 'xfs-4.12-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull XFS fix from Darrick Wong:
 "I've one more bugfix for you for 4.12-rc4: Fix an unmount hang due to
  a race in io buffer accounting"

* tag 'xfs-4.12-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: use ->b_state to fix buffer I/O accounting release race

7 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 2 Jun 2017 19:06:27 +0000 (12:06 -0700)]
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:
 "ACPI-related fixes for arm64:

   - GICC MADT entry validity check fix

   - Skip IRQ registration with pmu=off in an ACPI guest

   - struct acpi_pci_root_ops freeing on error path"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  ARM64/ACPI: Fix BAD_MADT_GICC_ENTRY() macro implementation
  drivers/perf: arm_pmu_acpi: avoid perf IRQ init when guest PMU is off
  ARM64: PCI: Fix struct acpi_pci_root_ops allocation failure path

7 years agoMerge tag 'ceph-for-4.12-rc4' of git://github.com/ceph/ceph-client
Linus Torvalds [Fri, 2 Jun 2017 19:03:07 +0000 (12:03 -0700)]
Merge tag 'ceph-for-4.12-rc4' of git://github.com/ceph/ceph-client

Pull ceph fix from Ilya Dryomov:
 "A small fix for rbd FALLOC_FL_ZERO_RANGE/PUNCH_HOLE handling breakage
  introduced in -rc1"

* tag 'ceph-for-4.12-rc4' of git://github.com/ceph/ceph-client:
  rbd: implement REQ_OP_WRITE_ZEROES

7 years agoMerge tag 'for-4.12/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 2 Jun 2017 18:50:37 +0000 (11:50 -0700)]
Merge tag 'for-4.12/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - a DM verity fix for a mode when no salt is used

 - a fix to DM to account for the possibility that PREFLUSH or FUA are
   used without the SYNC flag if the underlying storage doesn't have a
   volatile write-cache

 - a DM ioctl memory allocation flag fix to use __GFP_HIGH to allow
   emergency forward progress (by using memory reserves as last resort)

 - a small DM integrity cleanup to use kvmalloc() instead of duplicating
   the same

* tag 'for-4.12/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: make flush bios explicitly sync
  dm ioctl: restore __GFP_HIGH in copy_params()
  dm integrity: use kvmalloc() instead of dm_integrity_kvmalloc()
  dm verity: fix no salt use case

7 years agoMerge tag 'md/4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Linus Torvalds [Fri, 2 Jun 2017 18:47:24 +0000 (11:47 -0700)]
Merge tag 'md/4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:
 "Several patches for MD. One notable is making flush bios sync, others
  fix small issues"

* tag 'md/4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md: Make flush bios explicitely sync
  md: report sector of stripes with check mismatches
  md: uuid debug statement now in processor byte order.
  md-cluster: fix potential lock issue in add_new_disk

7 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 2 Jun 2017 18:44:46 +0000 (11:44 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A set of fixes that should go into the next -rc. This contains:

   - A use-after-free in the request_list exit for the legacy IO path,
     from Bart.

   - A fix for CFQ, fixing a recent regression with the conversion to
     higher resolution timing for iops mode. From Hou Tao.

   - A single fix for nbd, split in two patches, fixing a leak of a data
     structure.

   - A regression fix from Keith, ensuring that callers of
     blk_mq_update_nr_hw_queues() hold the right lock"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: Avoid that blk_exit_rl() triggers a use-after-free
  cfq-iosched: fix the delay of cfq_group's vdisktime under iops mode
  blk-mq: Take tagset lock when updating hw queues
  nbd: don't leak nbd_config
  nbd: nbd_reset() call in nbd_dev_add() is redundant

7 years agoMerge tag 'drm-dp-quirk-for-v4.12-rc4' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 2 Jun 2017 18:32:38 +0000 (11:32 -0700)]
Merge tag 'drm-dp-quirk-for-v4.12-rc4' of git://people.freedesktop.org/~airlied/linux

Pull drm displayport quirk support:
 "DP quirk for usb c dongles.

  As mentioned I have a separate request for fixing a regression, but
  also keeping the broken hw working, for certain USB-C DP adapters they
  require a minimised n/m parameters, but an attempt to do this
  generically has failed, we need to quirk these specific adapters.
  However doing it generically regressed some eDP panels.

  This pull adds the infrastructure and a quirk for the adapter"

* tag 'drm-dp-quirk-for-v4.12-rc4' of git://people.freedesktop.org/~airlied/linux:
  drm/i915: Detect USB-C specific dongles before reducing M and N
  drm/dp: start a DPCD based DP sink/branch device quirk database
  drm/i915: use drm DP helper to read DPCD desc
  drm/dp: add helper for reading DP sink/branch device desc from DPCD

7 years agoMerge tag 'sound-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 2 Jun 2017 16:40:47 +0000 (09:40 -0700)]
Merge tag 'sound-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "This contains the fixes for a few reported regression for HD-audio and
  USB-audio. All small, trivial, and boring"

* tag 'sound-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix applying MSI dual-codec mobo quirk
  ALSA: usb: Avoid VLA in mixer_us16x08.c
  ALSA: usb: Fix a typo in Tascam US-16x08 mixer element
  Revert "ALSA: usb-audio: purge needless variable length array"

7 years agoMerge tag 'dmaengine-fix-4.12-rc4' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Fri, 2 Jun 2017 16:26:42 +0000 (09:26 -0700)]
Merge tag 'dmaengine-fix-4.12-rc4' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "Here is the dmaengine fixes request for 4.12. Fixes bunch of issues in
  the driver, npthing exciting though..

   - mv_xor_v2 driver fixes for handling descriptors, tx_submit
     implementation, removing interrupt coalescing and setting DMA mask
     properly

   - fix usb-dmac DMAOR AE bit definition

   - fix ep93xx start buffer from BASE0 and not drain the transfers in
     terminate_all

   - fix rcar-dmac to use right descriptor pointer for residue
     calculation

   - pl330 fix warn for irq freeup"

* tag 'dmaengine-fix-4.12-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: pl330: fix warning in pl330_remove
  rcar-dmac: fixup descriptor pointer for descriptor mode
  dmaengine: ep93xx: Don't drain the transfers in terminate_all()
  dmaengine: ep93xx: Always start from BASE0
  dmaengine: usb-dmac: Fix DMAOR AE bit definition
  dmaengine: mv_xor_v2: set DMA mask to 40 bits
  dmaengine: mv_xor_v2: remove interrupt coalescing
  dmaengine: mv_xor_v2: fix tx_submit() implementation
  dmaengine: mv_xor_v2: enable XOR engine after its configuration
  dmaengine: mv_xor_v2: do not use descriptors not acked by async_tx
  dmaengine: mv_xor_v2: properly handle wrapping in the array of HW descriptors
  dmaengine: mv_xor_v2: handle mv_xor_v2_prep_sw_desc() error properly

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Fri, 2 Jun 2017 16:23:56 +0000 (09:23 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid

Pull HID fixes from Jiri Kosina:

 - corner-case oops fixes for Asus and Wacom drivers from Carlo Caione
   and Jason Gerecke

 - power management fix (reported on SIS0817 touchscreen) for i2c-hid
   devices from Hans de Goede

 - device-id-specific fixes and quirks from Hans de Goede, Diego Elio
   Pettenò and Che-Liang Chiou

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: asus: Stop underlying hardware on remove
  HID: i2c: Call acpi_device_fix_up_power for ACPI-enumerated devices
  HID: asus: Add support for T100 keyboard
  HID: elecom: extend to fix the descriptor for DEFT trackballs
  HID: magicmouse: Set multi-touch keybits for Magic Mouse
  HID: wacom: Have wacom_tpc_irq guard against possible NULL dereference

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livep...
Linus Torvalds [Fri, 2 Jun 2017 15:59:17 +0000 (08:59 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching

Pull livepatching fix from Jiri Kosina:
 "Kconfig dependency fix for livepatching infrastructure from Miroslav
  Benes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: Make livepatch dependent on !TRIM_UNUSED_KSYMS

7 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 2 Jun 2017 15:53:42 +0000 (08:53 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - revert a broken PAT commit that broke a number of systems

   - fix two preemptability warnings/bugs that can trigger under certain
     circumstances, in the debug code and in the microcode loader"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "x86/PAT: Fix Xorg regression on CPUs that don't support PAT"
  x86/debug/32: Convert a smp_processor_id() call to raw to avoid DEBUG_PREEMPT warning
  x86/microcode/AMD: Change load_microcode_amd()'s param to bool to fix preemptibility bug

7 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 2 Jun 2017 15:51:53 +0000 (08:51 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "Misc fixes:

   - three boot crash fixes for uncommon configurations

   - silence a boot warning under virtualization

   - plus a GCC 7 related (harmless) build warning fix"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/bgrt: Skip efi_bgrt_init() in case of non-EFI boot
  x86/efi: Correct EFI identity mapping under 'efi=old_map' when KASLR is enabled
  x86/efi: Disable runtime services on kexec kernel if booted with efi=old_map
  efi: Remove duplicate 'const' specifiers
  efi: Don't issue error message when booted under Xen

7 years agoARM64/ACPI: Fix BAD_MADT_GICC_ENTRY() macro implementation
Lorenzo Pieralisi [Fri, 26 May 2017 16:40:02 +0000 (17:40 +0100)]
ARM64/ACPI: Fix BAD_MADT_GICC_ENTRY() macro implementation

The BAD_MADT_GICC_ENTRY() macro checks if a GICC MADT entry passes
muster from an ACPI specification standpoint. Current macro detects the
MADT GICC entry length through ACPI firmware version (it changed from 76
to 80 bytes in the transition from ACPI 5.1 to ACPI 6.0 specification)
but always uses (erroneously) the ACPICA (latest) struct (ie struct
acpi_madt_generic_interrupt - that is 80-bytes long) length to check if
the current GICC entry memory record exceeds the MADT table end in
memory as defined by the MADT table header itself, which may result in
false negatives depending on the ACPI firmware version and how the MADT
entries are laid out in memory (ie on ACPI 5.1 firmware MADT GICC
entries are 76 bytes long, so by adding 80 to a GICC entry start address
in memory the resulting address may well be past the actual MADT end,
triggering a false negative).

Fix the BAD_MADT_GICC_ENTRY() macro by reshuffling the condition checks
and update them to always use the firmware version specific MADT GICC
entry length in order to carry out boundary checks.

Fixes: b6cfb277378e ("ACPI / ARM64: add BAD_MADT_GICC_ENTRY() macro")
Reported-by: Julien Grall <julien.grall@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Julien Grall <julien.grall@arm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Al Stone <ahs3@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
7 years agoHID: asus: Stop underlying hardware on remove
Carlo Caione [Tue, 30 May 2017 20:39:46 +0000 (22:39 +0200)]
HID: asus: Stop underlying hardware on remove

We are missing a call to hid_hw_stop() on the remove hook.
Among other things this is causing an Oops when (re-)starting GNOME /
upowerd / ... after the module has been already rmmod-ed.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
7 years agodmaengine: pl330: fix warning in pl330_remove
Jean-Philippe Brucker [Thu, 1 Jun 2017 18:22:01 +0000 (19:22 +0100)]
dmaengine: pl330: fix warning in pl330_remove

When removing a device with less than 9 IRQs (AMBA_NR_IRQS), we'll get a
big WARN_ON from devres.c because pl330_remove calls devm_free_irqs for
unallocated irqs. Similarly to pl330_probe, check that IRQ number is
present before calling devm_free_irq.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
7 years agoInput: tm2-touchkey - use LEN_ON as boolean value instead of LED_FULL
Andi Shyti [Fri, 2 Jun 2017 05:05:40 +0000 (22:05 -0700)]
Input: tm2-touchkey - use LEN_ON as boolean value instead of LED_FULL

Commit 4e552c8cb5bc ("leds: add LED_ON brightness as boolean value")
has introduced the LED_ON enumeration value that can be used
instead of LED_FULL which has more of a linear value.

Because the tm2-touchscreen doesn't have brightness levels, but
it's a simple on/off led, use LED_ON instead of LED_FULL.

Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Reviewed-by: Jaechul Lee <jcsing.lee@samsung.com>
Tested-by: Jaechul Lee <jcsing.lee@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
7 years agoMerge tag 'topic/dp-quirks-2017-05-31' of git://anongit.freedesktop.org/git/drm-intel...
Dave Airlie [Fri, 2 Jun 2017 02:57:32 +0000 (12:57 +1000)]
Merge tag 'topic/dp-quirks-2017-05-31' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

DP sink specific quirks

* tag 'topic/dp-quirks-2017-05-31' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Detect USB-C specific dongles before reducing M and N
  drm/dp: start a DPCD based DP sink/branch device quirk database
  drm/i915: use drm DP helper to read DPCD desc
  drm/dp: add helper for reading DP sink/branch device desc from DPCD

7 years agoMerge tag 'nfsd-4.12-1' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Thu, 1 Jun 2017 23:24:48 +0000 (16:24 -0700)]
Merge tag 'nfsd-4.12-1' of git://linux-nfs.org/~bfields/linux

Pull nfsd fixes from Bruce Fields:
 "Revert patch accidentally included in the merge window pull request,
  and fix a crash that was likely a result of buggy client behavior"

* tag 'nfsd-4.12-1' of git://linux-nfs.org/~bfields/linux:
  nfsd4: fix null dereference on replay
  nfsd: Revert "nfsd: check for oversized NFSv2/v3 arguments"

7 years agoMerge tag 'gcc-plugins-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 1 Jun 2017 23:17:42 +0000 (16:17 -0700)]
Merge tag 'gcc-plugins-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull gcc-plugin prepwork from Kees Cook:
 "Use designated initializers for mtk-vcodec, powerplay, amdgpu, and
  sgi-xp. Use ERR_CAST() to avoid cross-structure cast in ocf2, ntfs,
  and NFS.

  Christoph Hellwig recommended that I send these fixes now, rather than
  waiting for the v4.13 merge window. These are all initializer and cast
  fixes needed for the future randstruct plugin that haven't been picked
  up by the respective maintainers"

* tag 'gcc-plugins-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  mtk-vcodec: Use designated initializers
  drm/amd/powerplay: Use designated initializers
  drm/amdgpu: Use designated initializers
  sgi-xp: Use designated initializers
  ocfs2: Use ERR_CAST() to avoid cross-structure cast
  ntfs: Use ERR_CAST() to avoid cross-structure cast
  NFS: Use ERR_CAST() to avoid cross-structure cast

7 years agoRDMA/SA: Fix kernel panic in CMA request handler flow
Majd Dibbiny [Sun, 21 May 2017 16:09:54 +0000 (19:09 +0300)]
RDMA/SA: Fix kernel panic in CMA request handler flow

Commit 9fdca4da4d8c (IB/SA: Split struct sa_path_rec based on IB and
ROCE specific fields) moved the service_id to be specific attribute
for IB and OPA SA Path Record, and thus wasn't assigned for RoCE.

This caused to the following kernel panic in the CMA request handler flow:

[   27.074594] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[   27.074731] IP: __radix_tree_lookup+0x1d/0xe0
...
[   27.075356] Workqueue: ib_cm cm_work_handler [ib_cm]
[   27.075401] task: ffff88022e3b8000 task.stack: ffffc90001298000
[   27.075449] RIP: 0010:__radix_tree_lookup+0x1d/0xe0
...
[   27.075979] Call Trace:
[   27.076015]  radix_tree_lookup+0xd/0x10
[   27.076055]  cma_ps_find+0x59/0x70 [rdma_cm]
[   27.076097]  cma_id_from_event+0xd2/0x470 [rdma_cm]
[   27.076144]  ? ib_init_ah_from_path+0x39a/0x590 [ib_core]
[   27.076193]  cma_req_handler+0x25/0x480 [rdma_cm]
[   27.076237]  cm_process_work+0x25/0x120 [ib_cm]
[   27.076280]  ? cm_get_bth_pkey.isra.62+0x3c/0xa0 [ib_cm]
[   27.076350]  cm_req_handler+0xb03/0xd40 [ib_cm]
[   27.076430]  ? sched_clock_cpu+0x11/0xb0
[   27.076478]  cm_work_handler+0x194/0x1588 [ib_cm]
[   27.076525]  process_one_work+0x160/0x410
[   27.076565]  worker_thread+0x137/0x4a0
[   27.076614]  kthread+0x112/0x150
[   27.076684]  ? max_active_store+0x60/0x60
[   27.077642]  ? kthread_park+0x90/0x90
[   27.078530]  ret_from_fork+0x2c/0x40

This patch moves it back to the common SA Path Record structure
and removes the redundant setter and getter.

Tested on Connect-IB and Connect-X4 in Infiniband and RoCE respectively.

Fixes: 9fdca4da4d8c (IB/SA: Split struct sa_path_rec based on IB ands
ROCE specific fields)
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/umem: Fix missing mmap_sem in get umem ODP call
Leon Romanovsky [Sun, 21 May 2017 16:08:09 +0000 (19:08 +0300)]
RDMA/umem: Fix missing mmap_sem in get umem ODP call

Add mmap_sem lock around VMA inspection in ib_umem_odp_get().

Fixes: 0008b84ea9af ('IB/umem: Add support to huge ODP')
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/core: not to set page dirty bit if it's already set.
Qing Huang [Thu, 18 May 2017 23:33:53 +0000 (16:33 -0700)]
RDMA/core: not to set page dirty bit if it's already set.

This change will optimize kernel memory deregistration operations.
__ib_umem_release() used to call set_page_dirty_lock() against every
writable page in its memory region. Its purpose is to keep data
synced between CPU and DMA device when swapping happens after mem
deregistration ops. Now we choose not to set page dirty bit if it's
already set by kernel prior to calling __ib_umem_release(). This
reduces memory deregistration time by half or even more when we ran
application simulation test program.

Signed-off-by: Qing Huang <qing.huang@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/uverbs: Declare local function static and add brackets to sizeof
Leon Romanovsky [Thu, 18 May 2017 04:40:33 +0000 (07:40 +0300)]
RDMA/uverbs: Declare local function static and add brackets to sizeof

Commit 57520751445b ("IB/SA: Add OPA path record type") introduced
new local function __ib_copy_path_rec_to_user, but didn't limit its
scope. This produces the following sparse warning:

drivers/infiniband/core/uverbs_marshall.c:99:6: warning:
symbol '__ib_copy_path_rec_to_user' was not declared. Should it be
static?

In addition, it used sizeof ... notations instead of sizeof(...), which
is correct in C, but a little bit misleading. Let's change it too.

Fixes: 57520751445b ("IB/SA: Add OPA path record type")
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/netlink: Reduce exposure of RDMA netlink functions
Leon Romanovsky [Sun, 14 May 2017 12:49:57 +0000 (15:49 +0300)]
RDMA/netlink: Reduce exposure of RDMA netlink functions

RDMA netlink is part of ib_core, hence ibnl_chk_listeners(),
ibnl_init() and ibnl_cleanup() don't need to be published
in public header file.

Let's remove EXPORT_SYMBOL from ibnl_chk_listeners() and move all these
functions to private header file.

CC: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/srp: Fix NULL deref at srp_destroy_qp()
Israel Rukshin [Thu, 11 May 2017 15:52:36 +0000 (18:52 +0300)]
RDMA/srp: Fix NULL deref at srp_destroy_qp()

If srp_init_qp() fails at srp_create_ch_ib() then ch->send_cq
may be NULL.
Calling directly to ib_destroy_qp() is sufficient because
no work requests were posted on the created qp.

Fixes: 9294000d6d89 ("IB/srp: Drain the send queue before destroying a QP")
Cc: <stable@vger.kernel.org>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Bart van Assche <bart.vanassche@sandisk.com>--
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/IPoIB: Limit the ipoib_dev_uninit_default scope
Leon Romanovsky [Sun, 14 May 2017 10:32:06 +0000 (13:32 +0300)]
RDMA/IPoIB: Limit the ipoib_dev_uninit_default scope

ipoib_dev_uninit_default() call is used in ipoib_main.c file only
and it generates the following warning from smatch tool:
drivers/infiniband/ulp/ipoib/ipoib_main.c:1593:6: warning:
symbol 'ipoib_dev_uninit_default' was not declared. Should it
be static?

so let's declare that function as static.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/IPoIB: Replace netdev_priv with ipoib_priv for ipoib_get_link_ksettings
Honggang Li [Thu, 11 May 2017 12:14:28 +0000 (20:14 +0800)]
RDMA/IPoIB: Replace netdev_priv with ipoib_priv for ipoib_get_link_ksettings

ipoib_dev_init accesses the wrong private data for the IPoIB device.
Commit cd565b4b51e5 (IB/IPoIB: Support acceleration options callbacks)
changed ipoib_priv from being identical to netdev_priv to being an
area inside of, but not the same pointer as, the netdev_priv pointer.
As such, the struct we want is the ipoib_priv area, not the netdev_priv
area, so use the right accessor, otherwise we kernel panic.

[   27.271938] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link becomes ready
[   28.156790] BUG: unable to handle kernel NULL pointer dereference at 000000000000067c
[   28.166309] IP: ib_query_port+0x30/0x180 [ib_core]
...
[   28.306282] RIP: 0010:ib_query_port+0x30/0x180 [ib_core]
...
[   28.393337] Call Trace:
[   28.397594]  ipoib_get_link_ksettings+0x66/0xe0 [ib_ipoib]
[   28.405274]  __ethtool_get_link_ksettings+0xa0/0x1c0
[   28.412353]  speed_show+0x74/0xa0
[   28.417503]  dev_attr_show+0x20/0x50
[   28.422922]  ? mutex_lock+0x12/0x40
[   28.428179]  sysfs_kf_seq_show+0xbf/0x1a0
[   28.434002]  kernfs_seq_show+0x21/0x30
[   28.439470]  seq_read+0x116/0x3b0
[   28.444445]  ? do_filp_open+0xa5/0x100
[   28.449774]  kernfs_fop_read+0xff/0x180
[   28.455220]  __vfs_read+0x37/0x150
[   28.460167]  ? security_file_permission+0x9d/0xc0
[   28.466560]  vfs_read+0x8c/0x130
[   28.471318]  SyS_read+0x55/0xc0
[   28.475950]  do_syscall_64+0x67/0x150
[   28.481163]  entry_SYSCALL64_slow_path+0x25/0x25
...
[   28.584493] ---[ end trace 3549968a4bf0aa5d ]---

Fixes: cd565b4b51e5 (IB/IPoIB: Support acceleration options callbacks)
Fixes: 0d7e2d2166f6 (IB/ipoib: add get_link_ksettings in ethtool)
Signed-off-by: Honggang Li <honli@redhat.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/qedr: add null check before pointer dereference
Gustavo A. R. Silva [Mon, 22 May 2017 18:30:15 +0000 (13:30 -0500)]
RDMA/qedr: add null check before pointer dereference

Add null check before dereferencing pointer sgid_attr.ndev
inside function rdma_vlan_dev_vlan_id().

Addresses-Coverity-ID: 1373979
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/mlx5: set UMR wqe fence according to HCA cap
Max Gurtovoy [Sun, 28 May 2017 07:53:11 +0000 (10:53 +0300)]
RDMA/mlx5: set UMR wqe fence according to HCA cap

Cache the needed umr_fence and set the wqe ctrl segmennt
accordingly.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Acked-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agonet/mlx5: Define interface bits for fencing UMR wqe
Max Gurtovoy [Sun, 28 May 2017 07:53:10 +0000 (10:53 +0300)]
net/mlx5: Define interface bits for fencing UMR wqe

HW can implement UMR wqe re-transmission in various ways.
Thus, add HCA cap to distinguish the needed fence for UMR to make
sure that the wqe wouldn't fail on mkey checks.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Acked-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/mlx4: Fix MAD tunneling when SRIOV is enabled
Jack Morgenstein [Sun, 21 May 2017 16:11:13 +0000 (19:11 +0300)]
RDMA/mlx4: Fix MAD tunneling when SRIOV is enabled

The cited patch added a type field to structures ib_ah and rdma_ah_attr.

Function mlx4_ib_query_ah() builds an rdma_ah_attr structure from the
data in an mlx4_ib_ah structure (which contains both an ib_ah structure
and an address vector).

For mlx4_ib_query_ah() to work properly, the type field in the contained
ib_ah structure must be set correctly.

In the outgoing MAD tunneling flow, procedure mlx4_ib_multiplex_mad()
paravirtualizes a MAD received from a slave and sends the processed
mad out over the wire. During this processing, it populates an
mlx4_ib_ah structure and calls mlx4_ib_query_ah().

The cited commit overlooked setting the type field in the contained
ib_ah structure before invoking mlx4_ib_query_ah(). As a result, the
type field remained uninitialized, and the rdma_ah_attr structure was
incorrectly built. This resulted in improperly built MADs being sent out
over the wire.

This patch properly initializes the type field in the contained ib_ah
structure before calling mlx4_ib_query_ah(). The rdma_ah_attr structure
is then generated correctly.

Fixes: 44c58487d51a ("IB/core: Define 'ib' and 'roce' rdma_ah_attr types")
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/qib,hfi1: Fix MR reference count leak on write with immediate
Mike Marciniszyn [Fri, 12 May 2017 16:02:00 +0000 (09:02 -0700)]
RDMA/qib,hfi1: Fix MR reference count leak on write with immediate

The handling of IB_RDMA_WRITE_ONLY_WITH_IMMEDIATE will leak a memory
reference when a buffer cannot be allocated for returning the immediate
data.

The issue is that the rkey validation has already occurred and the RNR
nak fails to release the reference that was fruitlessly gotten.  The
the peer will send the identical single packet request when its RNR
timer pops.

The fix is to release the held reference prior to the rnr nak exit.
This is the only sequence the requires both rkey validation and the
buffer allocation on the same packet.

Cc: Stable <stable@vger.kernel.org> # 4.7+
Tested-by: Tadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/hfi1: Defer setting VL15 credits to link-up interrupt
Byczkowski, Jakub [Fri, 12 May 2017 16:01:37 +0000 (09:01 -0700)]
RDMA/hfi1: Defer setting VL15 credits to link-up interrupt

Keep VL15 credits at 0 during LNI, before link-up. Store
VL15 credits value during verify cap interrupt and set
in after link-up. This addresses an issue where VL15 MAD
packets could be sent by one side of the link before
the other side is ready to receive them.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/hfi1: change PCI bar addr assignments to Linux API functions
Steven L. Roberts [Wed, 10 May 2017 19:58:13 +0000 (14:58 -0500)]
RDMA/hfi1: change PCI bar addr assignments to Linux API functions

The Omni-Path adapter driver fails to load on the ppc64le platform
due to invalid PCI setup.

This patch makes the PCI configuration more robust and will
fix 64 bit addressing for ppc64le.

Signed-off-by: Steven L Roberts <robers97@gmail.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/hfi1: fix array termination by appending NULL to attr array
Steven L. Roberts [Wed, 10 May 2017 15:54:12 +0000 (10:54 -0500)]
RDMA/hfi1: fix array termination by appending NULL to attr array

This fixes a kernel panic when loading the hfi driver as a dynamic module.

Signed-off-by: Steven L Roberts <robers97@gmail.com>
Reviewed-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/iw_cxgb4: fix the calculation of ipv6 header size
Raju Rangoju [Wed, 31 May 2017 06:36:58 +0000 (12:06 +0530)]
RDMA/iw_cxgb4: fix the calculation of ipv6 header size

Take care of ipv6 checks while computing header length for deducing mtu
size of ipv6 servers. Due to the incorrect header length computation for
ipv6 servers, wrong mss is reported to the peer (client).

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/iw_cxgb4: calculate t4_eq_status_entries properly
Ganesh Goudar [Fri, 19 May 2017 09:18:42 +0000 (14:48 +0530)]
RDMA/iw_cxgb4: calculate t4_eq_status_entries properly

use egrstatuspagesize to calculate t4_eq_status_entries.

Fixes: bb58d07964f2 ("cxgb4: Update IngPad and IngPack values")
Reported-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/iw_cxgb4: Avoid touch after free error in ARP failure handlers
Raju Rangoju [Mon, 15 May 2017 06:40:39 +0000 (06:40 +0000)]
RDMA/iw_cxgb4: Avoid touch after free error in ARP failure handlers

The patch 761e19a504af (RDMA/iw_cxgb4: Handle return value of
c4iw_ofld_send() in abort_arp_failure()) from May 6, 2016
leads to the following static checker warning:
drivers/infiniband/hw/cxgb4/cm.c:575 abort_arp_failure()
warn: passing freed memory 'skb'

Also fixes skb leak when l2t resolution fails

Fixes: 761e19a504afa55 (RDMA/iw_cxgb4: Handle return value of
c4iw_ofld_send() in abort_arp_failure())
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/nes: ACK MPA Reply frame
Tatyana Nikolova [Wed, 10 May 2017 21:46:40 +0000 (16:46 -0500)]
RDMA/nes: ACK MPA Reply frame

Explicitly ACK the MPA Reply frame so the peer
does not retransmit the frame.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/nes: Don't set 0-length FULPDU RTR indication control flag
Tatyana Nikolova [Wed, 10 May 2017 21:46:39 +0000 (16:46 -0500)]
RDMA/nes: Don't set 0-length FULPDU RTR indication control flag

Don't set control flag for 0-length FULPDU (Send) RTR indication
in the enhanced MPA Request/Reply frames, because it isn't supported.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/i40iw: fix duplicated code for different branches
Gustavo A. R. Silva [Thu, 18 May 2017 18:11:17 +0000 (13:11 -0500)]
RDMA/i40iw: fix duplicated code for different branches

Refactor code to avoid identical code for different branches.

Addresses-Coverity-ID: 1357356
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/i40iw: Remove MSS change support
Shiraz Saleem [Fri, 19 May 2017 21:14:02 +0000 (16:14 -0500)]
RDMA/i40iw: Remove MSS change support

MSS change on active QPs is not supported. Store new MSS
value for new QPs only. Remove code to modify MSS on the fly.
This also resolves a crash on QP modify to QP 0.

BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
IP: i40iw_sc_qp_modify+0x22/0x280 [i40iw]
Oops: 0000 [#1] SMP KASAN
CPU: 2 PID: 1236 Comm: kworker/u16:4 Not tainted 4.12.0-rc1 #5
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Q87M-D2H,
BIOS F7 01/17/2014
Workqueue: l2params i40iw_l2params_worker [i40iw]
task: ffff88070f5a9b40 task.stack: ffff88070f5a0000
RIP: 0010:i40iw_sc_qp_modify+0x22/0x280 [i40iw]
...
Call Trace:
i40iw_exec_cqp_cmd+0x2ce/0x410 [i40iw]
? _raw_spin_lock_irqsave+0x6f/0x80
? i40iw_process_cqp_cmd+0x1d/0x80 [i40iw]
i40iw_process_cqp_cmd+0x7c/0x80 [i40iw]
i40iw_handle_cqp_op+0x2f/0x200 [i40iw]
? trace_hardirqs_off+0xd/0x10
? _raw_spin_unlock_irqrestore+0x46/0x50
i40iw_hw_modify_qp+0x5e/0x90 [i40iw]
i40iw_qp_mss_modify+0x52/0x60 [i40iw]
i40iw_change_l2params+0x145/0x160 [i40iw]
i40iw_l2params_worker+0x1f/0x40 [i40iw]
process_one_work+0x1f5/0x650
? process_one_work+0x161/0x650
worker_thread+0x48/0x3b0
kthread+0x112/0x150
? process_one_work+0x650/0x650
? kthread_create_on_node+0x40/0x40
ret_from_fork+0x2e/0x40
Code: 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 41 55 41 89 cd 41 54 49 89 fc
53 48 89 f3 48 89 d6 48 83 ec 08 48 8b 87 10 01 00 00 <48> 8b 40 08 4c 8b b0 40 04
00 00 4c 89 f7 e8 1b e5 ff ff 48 85
RIP: i40iw_sc_qp_modify+0x22/0x280 [i40iw] RSP: ffff88070f5a7c28
CR2: 0000000000000008
---[ end trace 77a405931e296060 ]---

Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/i40iw: Fix device initialization error path
Mustafa Ismail [Thu, 11 May 2017 04:32:14 +0000 (23:32 -0500)]
RDMA/i40iw: Fix device initialization error path

Some error paths in i40iw_initialize_dev are doing
additional and unnecessary work before exiting.
Correctly free resources allocated prior to error
and return with correct status code.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intelcom>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/i40iw: ACK MPA Reject frame
Tatyana Nikolova [Fri, 5 May 2017 17:05:17 +0000 (12:05 -0500)]
RDMA/i40iw: ACK MPA Reject frame

Explicitly ACK the MPA Reject frame so the peer does
not retransmit the frame.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoRDMA/i40iw: Don't set 0-length FULPDU RTR indication control flag
Tatyana Nikolova [Fri, 5 May 2017 17:05:16 +0000 (12:05 -0500)]
RDMA/i40iw: Don't set 0-length FULPDU RTR indication control flag

Don't set control flag for 0-length FULPDU (Send)
RTR indication in the enhanced MPA Request/Reply
frames, because it isn't supported.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
7 years agoblock: Avoid that blk_exit_rl() triggers a use-after-free
Bart Van Assche [Wed, 31 May 2017 21:43:45 +0000 (14:43 -0700)]
block: Avoid that blk_exit_rl() triggers a use-after-free

Since the introduction of .init_rq_fn() and .exit_rq_fn() it is
essential that the memory allocated for struct request_queue
stays around until all blk_exit_rl() calls have finished. Hence
make blk_init_rl() take a reference on struct request_queue.

This patch fixes the following crash:

general protection fault: 0000 [#2] SMP
CPU: 3 PID: 28 Comm: ksoftirqd/3 Tainted: G      D         4.12.0-rc2-dbg+ #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
task: ffff88013a108040 task.stack: ffffc9000071c000
RIP: 0010:free_request_size+0x1a/0x30
RSP: 0018:ffffc9000071fd38 EFLAGS: 00010202
RAX: 6b6b6b6b6b6b6b6b RBX: ffff880067362a88 RCX: 0000000000000003
RDX: ffff880067464178 RSI: ffff880067362a88 RDI: ffff880135ea4418
RBP: ffffc9000071fd40 R08: 0000000000000000 R09: 0000000100180009
R10: ffffc9000071fd38 R11: ffffffff81110800 R12: ffff88006752d3d8
R13: ffff88006752d3d8 R14: ffff88013a108040 R15: 000000000000000a
FS:  0000000000000000(0000) GS:ffff88013fd80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8ec1edb00 CR3: 0000000138ee8000 CR4: 00000000001406e0
Call Trace:
 mempool_destroy.part.10+0x21/0x40
 mempool_destroy+0xe/0x10
 blk_exit_rl+0x12/0x20
 blkg_free+0x4d/0xa0
 __blkg_release_rcu+0x59/0x170
 rcu_process_callbacks+0x260/0x4e0
 __do_softirq+0x116/0x250
 smpboot_thread_fn+0x123/0x1e0
 kthread+0x109/0x140
 ret_from_fork+0x31/0x40

Fixes: commit e9c787e65c0c ("scsi: allocate scsi_cmnd structures as part of struct request")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Cc: <stable@vger.kernel.org> # v4.11+
Signed-off-by: Jens Axboe <axboe@fb.com>
7 years agoMerge tag 'nand/fixes-for-4.12-rc3' of git://git.infradead.org/linux-mtd into MTD
Brian Norris [Thu, 1 Jun 2017 17:53:55 +0000 (10:53 -0700)]
Merge tag 'nand/fixes-for-4.12-rc3' of git://git.infradead.org/linux-mtd into MTD

From Boris:
"""
This pull request contains several fixes to the core and the tango
driver.

tango fixes:
 * Add missing MODULE_DEVICE_TABLE() in tango_nand.c
 * Update the number of corrected bitflips

core fixes:
 * Fix a long standing memory leak in nand_scan_tail()
 * Fix several bugs introduced by the per-vendor init/detection
   infrastructure (introduced in 4.12)
 * Add a static specifier to nand_ooblayout_lp_hamming_ops definition
"""

7 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Thu, 1 Jun 2017 17:48:09 +0000 (10:48 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "Many small x86 bug fixes: SVM segment registers access rights, nested
  VMX, preempt notifiers, LAPIC virtual wire mode, NMI injection"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Fix nmi injection failure when vcpu got blocked
  KVM: SVM: do not zero out segment attributes if segment is unusable or not present
  KVM: SVM: ignore type when setting segment registers
  KVM: nVMX: fix nested_vmx_check_vmptr failure paths under debugging
  KVM: x86: Fix virtual wire mode
  KVM: nVMX: Fix handling of lmsw instruction
  KVM: X86: Fix preempt the preemption timer cancel

7 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Linus Torvalds [Thu, 1 Jun 2017 17:45:27 +0000 (10:45 -0700)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull Reiserfs and GFS2 fixes from Jan Kara:
 "Fixes to GFS2 & Reiserfs for the fallout of the recent WRITE_FUA
  cleanup from Christoph.

  Fixes for other filesystems were already merged by respective
  maintainers."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  reiserfs: Make flush bios explicitely sync
  gfs2: Make flush bios explicitely sync

7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Thu, 1 Jun 2017 17:40:41 +0000 (10:40 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "Here are the target-pending fixes for v4.12-rc4:

   - ibmviscsis ABORT_TASK handling fixes that missed the v4.12 merge
     window. (Bryant Ly and Michael Cyr)

   - Re-add a target-core check enforcing WRITE overflow reject that was
     relaxed in v4.3, to avoid unsupported iscsi-target immediate data
     overflow. (nab)

   - Fix a target-core-user OOPs during device removal. (MNC + Bryant
     Ly)

   - Fix a long standing iscsi-target potential issue where kthread exit
     did not wait for kthread_should_stop(). (Jiang Yi)

   - Fix a iscsi-target v3.12.y regression OOPs involving initial login
     PDU processing during asynchronous TCP connection close. (MNC +
     nab)

  This is a little larger than usual for an -rc4, primarily due to the
  iscsi-target v3.12.y regression OOPs bug-fix.

  However, it's an important patch as MNC + Hannes where both able to
  trigger it using a reduced iscsi initiator login timeout combined with
  a backend taking a long time to complete I/Os during iscsi login
  driven session reinstatement"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: Always wait for kthread_should_stop() before kthread exit
  iscsi-target: Fix initial login PDU asynchronous socket close OOPs
  tcmu: fix crash during device removal
  target: Re-add check to reject control WRITEs with overflow data
  ibmvscsis: Fix the incorrect req_lim_delta
  ibmvscsis: Clear left-over abort_cmd pointers

7 years agoRevert "x86/PAT: Fix Xorg regression on CPUs that don't support PAT"
Ingo Molnar [Thu, 1 Jun 2017 13:52:23 +0000 (15:52 +0200)]
Revert "x86/PAT: Fix Xorg regression on CPUs that don't support PAT"

This reverts commit cbed27cdf0e3f7ea3b2259e86b9e34df02be3fe4.

As Andy Lutomirski observed:

 "I think this patch is bogus. pat_enabled() sure looks like it's
  supposed to return true if PAT is *enabled*, and these days PAT is
  'enabled' even if there's no HW PAT support."

Reported-by: Bernhard Held <berny156@gmx.de>
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: stable@vger.kernel.org # v4.2+
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
7 years agoKVM: x86: Fix nmi injection failure when vcpu got blocked
ZhuangYanying [Fri, 26 May 2017 05:16:48 +0000 (13:16 +0800)]
KVM: x86: Fix nmi injection failure when vcpu got blocked

When spin_lock_irqsave() deadlock occurs inside the guest, vcpu threads,
other than the lock-holding one, would enter into S state because of
pvspinlock. Then inject NMI via libvirt API "inject-nmi", the NMI could
not be injected into vm.

The reason is:
1 It sets nmi_queued to 1 when calling ioctl KVM_NMI in qemu, and sets
cpu->kvm_vcpu_dirty to true in do_inject_external_nmi() meanwhile.
2 It sets nmi_queued to 0 in process_nmi(), before entering guest, because
cpu->kvm_vcpu_dirty is true.

It's not enough just to check nmi_queued to decide whether to stay in
vcpu_block() or not. NMI should be injected immediately at any situation.
Add checking nmi_pending, and testing KVM_REQ_NMI replaces nmi_queued
in vm_vcpu_has_events().

Do the same change for SMIs.

Signed-off-by: Zhuang Yanying <ann.zhuangyanying@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agoKVM: SVM: do not zero out segment attributes if segment is unusable or not present
Roman Pen [Thu, 1 Jun 2017 08:55:03 +0000 (10:55 +0200)]
KVM: SVM: do not zero out segment attributes if segment is unusable or not present

This is a fix for the problem [1], where VMCB.CPL was set to 0 and interrupt
was taken on userspace stack.  The root cause lies in the specific AMD CPU
behaviour which manifests itself as unusable segment attributes on SYSRET.
The corresponding work around for the kernel is the following:

61f01dd941ba ("x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue")

In other turn virtualization side treated unusable segment incorrectly and
restored CPL from SS attributes, which were zeroed out few lines above.

In current patch it is assured only that P bit is cleared in VMCB.save state
and segment attributes are not zeroed out if segment is not presented or is
unusable, therefore CPL can be safely restored from DPL field.

This is only one part of the fix, since QEMU side should be fixed accordingly
not to zero out attributes on its side.  Corresponding patch will follow.

[1] Message id: CAJrWOzD6Xq==b-zYCDdFLgSRMPM-NkNuTSDFEtX=7MreT45i7Q@mail.gmail.com

Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com>
Signed-off-by: Mikhail Sennikovskii <mikhail.sennikovskii@profitbricks.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim KrÄmář <rkrcmar@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agoALSA: hda - Fix applying MSI dual-codec mobo quirk
Takashi Iwai [Thu, 1 Jun 2017 07:35:30 +0000 (09:35 +0200)]
ALSA: hda - Fix applying MSI dual-codec mobo quirk

The previous commit [63691587f7b0: ALSA: hda - Apply dual-codec quirk
for MSI Z270-Gaming mobo] attempted to apply the existing dual-codec
quirk for a MSI mobo.  But it turned out that this isn't applied
properly due to the MSI-vendor quirk before this entry.  I overlooked
such two MSI entries just because they were put in the wrong position,
although we have a list ordered by PCI SSID numbers.

This patch fixes it by rearranging the unordered entries.

Fixes: 63691587f7b0 ("ALSA: hda - Apply dual-codec quirk for MSI Z270-Gaming mobo")
Reported-by: Rudolf Schmidt <info@rudolfschmidt.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoMerge tag 'drm-fixes-for-v4.12-rc4' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 1 Jun 2017 04:53:49 +0000 (21:53 -0700)]
Merge tag 'drm-fixes-for-v4.12-rc4' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "This is the main set of fixes for rc4, one amdgpu fix, some exynos
  regression fixes, some msm fixes and some i915 and GVT fixes.

  I've got a second regression fix for some DP chips that might be a
  bit large, but I think we'd like to land it now, I'll send it along
  tomorrow, once you are happy with this set"

* tag 'drm-fixes-for-v4.12-rc4' of git://people.freedesktop.org/~airlied/linux: (24 commits)
  drm/amdgpu: Program ring for vce instance 1 at its register space
  drm/exynos: clean up description of exynos_drm_crtc
  drm/exynos: dsi: Remove bridge node reference in removal
  drm/exynos: dsi: Fix the parse_dt function
  drm/exynos: Merge pre/postclose hooks
  drm/msm: Fix the check for the command size
  drm/msm: Take the mutex before calling msm_gem_new_impl
  drm/msm: for array in-fences, check if all backing fences are from our own context before waiting
  drm/msm: constify irq_domain_ops
  drm/msm/mdp5: release hwpipe(s) for unused planes
  drm/msm: Reuse dma_fence_release.
  drm/msm: Expose our reservation object when exporting a dmabuf.
  drm/msm/gpu: check legacy clk names in get_clocks()
  drm/msm/mdp5: use __drm_atomic_helper_plane_duplicate_state()
  drm/msm: select PM_OPP
  drm/i915: Stop pretending to mask/unmask LPE audio interrupts
  drm/i915/selftests: Silence compiler warning in igt_ctx_exec
  Revert "drm/i915: Restore lost "Initialized i915" welcome message"
  drm/i915/gvt: clean up unsubmited workloads before destroying kmem cache
  drm/i915/gvt: Disable compression workaround for Gen9
  ...

7 years agoMerge tag 'exynos-drm-fixes-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel...
Dave Airlie [Thu, 1 Jun 2017 02:07:48 +0000 (12:07 +1000)]
Merge tag 'exynos-drm-fixes-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes

- Fix a regression to description of exynos_drm_crtc
- Remove preclose hook of Exynos
  . This was a exynos change of the patch series[1] merged already.
- Fix one dt broken issue
- Make sure to release bridge_node of Exynos MIPI-DSI driver.

[1] https://lists.freedesktop.org/archives/dri-devel/2017-March/135111.html

* tag 'exynos-drm-fixes-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm/exynos: clean up description of exynos_drm_crtc
  drm/exynos: dsi: Remove bridge node reference in removal
  drm/exynos: dsi: Fix the parse_dt function
  drm/exynos: Merge pre/postclose hooks

7 years agoMerge branch 'drm-fixes-4.12' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 1 Jun 2017 02:07:18 +0000 (12:07 +1000)]
Merge branch 'drm-fixes-4.12' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

* 'drm-fixes-4.12' of git://people.freedesktop.org/~agd5f/linux:
  drm/amdgpu: Program ring for vce instance 1 at its register space

7 years agoMerge branch 'msm-fixes-4.12-rc4' of git://people.freedesktop.org/~robclark/linux...
Dave Airlie [Thu, 1 Jun 2017 02:06:34 +0000 (12:06 +1000)]
Merge branch 'msm-fixes-4.12-rc4' of git://people.freedesktop.org/~robclark/linux into drm-fixes

a few fixes for 4.12..

* 'msm-fixes-4.12-rc4' of git://people.freedesktop.org/~robclark/linux:
  drm/msm: Fix the check for the command size
  drm/msm: Take the mutex before calling msm_gem_new_impl
  drm/msm: for array in-fences, check if all backing fences are from our own context before waiting
  drm/msm: constify irq_domain_ops
  drm/msm/mdp5: release hwpipe(s) for unused planes
  drm/msm: Reuse dma_fence_release.
  drm/msm: Expose our reservation object when exporting a dmabuf.
  drm/msm/gpu: check legacy clk names in get_clocks()
  drm/msm/mdp5: use __drm_atomic_helper_plane_duplicate_state()
  drm/msm: select PM_OPP

7 years agoMerge tag 'drm-intel-fixes-2017-05-29' of git://anongit.freedesktop.org/git/drm-intel...
Dave Airlie [Thu, 1 Jun 2017 01:53:34 +0000 (11:53 +1000)]
Merge tag 'drm-intel-fixes-2017-05-29' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

drm/i915 fixes for v4.12-rc4

* tag 'drm-intel-fixes-2017-05-29' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Stop pretending to mask/unmask LPE audio interrupts
  drm/i915/selftests: Silence compiler warning in igt_ctx_exec
  Revert "drm/i915: Restore lost "Initialized i915" welcome message"
  drm/i915/gvt: clean up unsubmited workloads before destroying kmem cache
  drm/i915/gvt: Disable compression workaround for Gen9
  drm/i915: set initialised only when init_context callback is NULL
  drm/i915: Fix new -Wint-in-bool-context gcc compiler warning
  drm/i915: use vma->size for appgtt allocate_va_range
  drm/i915: Do not sync RCU during shrinking

7 years agoiscsi-target: Always wait for kthread_should_stop() before kthread exit
Jiang Yi [Tue, 16 May 2017 09:57:55 +0000 (17:57 +0800)]
iscsi-target: Always wait for kthread_should_stop() before kthread exit

There are three timing problems in the kthread usages of iscsi_target_mod:

 - np_thread of struct iscsi_np
 - rx_thread and tx_thread of struct iscsi_conn

In iscsit_close_connection(), it calls

 send_sig(SIGINT, conn->tx_thread, 1);
 kthread_stop(conn->tx_thread);

In conn->tx_thread, which is iscsi_target_tx_thread(), when it receive
SIGINT the kthread will exit without checking the return value of
kthread_should_stop().

So if iscsi_target_tx_thread() exit right between send_sig(SIGINT...)
and kthread_stop(...), the kthread_stop() will try to stop an already
stopped kthread.

This is invalid according to the documentation of kthread_stop().

(Fix -ECONNRESET logout handling in iscsi_target_tx_thread and
 early iscsi_target_rx_thread failure case - nab)

Signed-off-by: Jiang Yi <jiangyilism@gmail.com>
Cc: <stable@vger.kernel.org> # v3.12+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>