Currently, raw6_sk(sk)->ip6mr_table is set unconditionally during
ip6_mroute_setsockopt(MRT6_TABLE). A subsequent attempt at the same
setsockopt will fail with -ENOENT, since we haven't actually created
that table.
A similar fix for ipv4 was included in commit 5e1859fbcc3c ("ipv4: ipmr:
various fixes and cleanups").
Fixes: d1db275dd3f6 ("ipv6: ip6mr: support multiple tables") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
In commit 624dbf55a359b ("driver/net: enic: Try DMA 64 first, then
failover to DMA") DMA mask was changed from 40 bits to 64 bits.
Hardware actually supports only 47 bits.
Fixes: 624dbf55a359b ("driver/net: enic: Try DMA 64 first, then failover to DMA") Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Syzbot reported the use-after-free in timer_is_static_object() [1].
This can happen because the structure for the rto timer (ccid2_hc_tx_sock)
is removed in dccp_disconnect(), and ccid2_hc_tx_rto_expire() can be
called after that.
The report [1] is similar to the one in commit 120e9dabaf55 ("dccp:
defer ccid_hc_tx_delete() at dismantle time"). And the fix is the same,
delay freeing ccid2_hc_tx_sock structure, so that it is freed in
dccp_sk_destruct().
[1]
==================================================================
BUG: KASAN: use-after-free in timer_is_static_object+0x80/0x90
kernel/time/timer.c:607
Read of size 8 at addr ffff8801bebb5118 by task syz-executor2/25299
Reported-by: syzbot+5d47e9ec91a6f15dbd6f@syzkaller.appspotmail.com Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Nearby code that also tests port suggests that the P0 constant should be
used when port is zero.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression e,e1;
@@
* e ? e1 : e1
// </smpl>
Fixes: 6c3218c6f7e5 ("bnx2x: Adjust ETS to 578xx") Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
In file included from scripts/kconfig/zconf.tab.c:2485:
scripts/kconfig/confdata.c: In function ‘conf_write’:
scripts/kconfig/confdata.c:773:22: warning: ‘%s’ directive writing likely 7 or more bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
sprintf(newname, "%s%s", dirname, basename);
^~
scripts/kconfig/confdata.c:773:19: note: assuming directive output of 7 bytes
sprintf(newname, "%s%s", dirname, basename);
^~~~~~
scripts/kconfig/confdata.c:773:2: note: ‘sprintf’ output 1 or more bytes (assuming 4104) into a destination of size 4097
sprintf(newname, "%s%s", dirname, basename);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
scripts/kconfig/confdata.c:776:23: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
^~~~~~~~~~~
scripts/kconfig/confdata.c:776:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097
sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Increase the size of tmpname and newname to make GCC happy.
Commit be83bbf80682 ("mmap: introduce sane default mmap limits") was
introduced to catch problems in various ad-hoc character device drivers
doing mmap and getting the size limits wrong. In the process, it used
"known good" limits for the normal cases of mapping regular files and
block device drivers.
It turns out that the "s_maxbytes" limit was less "known good" than I
thought. In particular, /proc doesn't set it, but exposes one regular
file to mmap: /proc/vmcore. As a result, that file got limited to the
default MAX_INT s_maxbytes value.
This went unnoticed for a while, because apparently the only thing that
needs it is the s390 kernel zfcpdump, but there might be other tools
that use this too.
Vasily suggested just changing s_maxbytes for all of /proc, which isn't
wrong, but makes me nervous at this stage. So instead, just make the
new mmap limit always be MAX_LFS_FILESIZE for regular files, which won't
affect anything else. It wasn't the regular file case I was worried
about.
I'd really prefer for maxsize to have been per-inode, but that is not
how things are today.
The internal VM "mmap()" interfaces are based on the mmap target doing
everything using page indexes rather than byte offsets, because
traditionally (ie 32-bit) we had the situation that the byte offset
didn't fit in a register. So while the mmap virtual address was limited
by the word size of the architecture, the backing store was not.
So we're basically passing "pgoff" around as a page index, in order to
be able to describe backing store locations that are much bigger than
the word size (think files larger than 4GB etc).
But while this all makes a ton of sense conceptually, we've been dogged
by various drivers that don't really understand this, and internally
work with byte offsets, and then try to work with the page index by
turning it into a byte offset with "pgoff << PAGE_SHIFT".
Which obviously can overflow.
Adding the size of the mapping to it to get the byte offset of the end
of the backing store just exacerbates the problem, and if you then use
this overflow-prone value to check various limits of your device driver
mmap capability, you're just setting yourself up for problems.
The correct thing for drivers to do is to do their limit math in page
indices, the way the interface is designed. Because the generic mmap
code _does_ test that the index doesn't overflow, since that's what the
mmap code really cares about.
HOWEVER.
Finding and fixing various random drivers is a sisyphean task, so let's
just see if we can just make the core mmap() code do the limiting for
us. Realistically, the only "big" backing stores we need to care about
are regular files and block devices, both of which are known to do this
properly, and which have nice well-defined limits for how much data they
can access.
So let's special-case just those two known cases, and then limit other
random mmap users to a backing store that still fits in "unsigned long".
Realistically, that's not much of a limit at all on 64-bit, and on
32-bit architectures the only worry might be the GPU drivers, which can
have big physical address spaces.
To make it possible for drivers like that to say that they are 64-bit
clean, this patch does repurpose the "FMODE_UNSIGNED_OFFSET" bit in the
file flags to allow drivers to mark their file descriptors as safe in
the full 64-bit mmap address space.
[ The timing for doing this is less than optimal, and this should really
go in a merge window. But realistically, this needs wide testing more
than it needs anything else, and being main-line is the only way to do
that.
So the earlier the better, even if it's outside the proper development
cycle - Linus ]
Cc: Kees Cook <keescook@chromium.org> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Willy Tarreau <w@1wt.eu> Cc: Dave Airlie <airlied@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Since SCSI scanning occurs asynchronously, since sd_revalidate_disk() is
called from sd_probe_async() and since sd_revalidate_disk() calls
sd_zbc_read_zones() it can happen that sd_zbc_read_zones() is called
concurrently with blkdev_report_zones() and/or blkdev_reset_zones(). That can
cause these functions to fail with -EIO because sd_zbc_read_zones() e.g. sets
q->nr_zones to zero before restoring it to the actual value, even if no drive
characteristics have changed. Avoid that this can happen by making the
following changes:
- Protect the code that updates zone information with blk_queue_enter()
and blk_queue_exit().
- Modify sd_zbc_setup_seq_zones_bitmap() and sd_zbc_setup() such that
these functions do not modify struct scsi_disk before all zone
information has been obtained.
Note: since commit 055f6e18e08f ("block: Make q_usage_counter also track
legacy requests"; kernel v4.15) the request queue freezing mechanism also
affects legacy request queues.
Fixes: 89d947561077 ("sd: Implement support for ZBC devices") Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.com> Cc: stable@vger.kernel.org # v4.16 Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
... into a global, two-dimensional array and service subsequent reads from
that cache to avoid rdmsr_on_cpu() calls during CPU hotplug (IPIs with IRQs
disabled).
In addition, this fixes a KASAN slab-out-of-bounds read due to wrong usage
of the bank->blocks pointer.
Fixes: 27bd59502702 ("x86/mce/AMD: Get address from already initialized block") Reported-by: Johannes Hirte <johannes.hirte@datenkhaos.de> Tested-by: Johannes Hirte <johannes.hirte@datenkhaos.de> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Yazen Ghannam <yazen.ghannam@amd.com> Link: http://lkml.kernel.org/r/20180414004230.GA2033@probook Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Yazen Ghannam [Wed, 21 Feb 2018 10:18:58 +0000 (11:18 +0100)]
x86/mce/AMD, EDAC/mce_amd: Enumerate Reserved SMCA bank type
BugLink: http://bugs.launchpad.net/bugs/1788897
Currently, bank 4 is reserved on Fam17h, so we chose not to initialize
bank 4 in the smca_banks array. This means that when we check if a bank
is initialized, like during boot or resume, we will see that bank 4 is
not initialized and try to initialize it.
This will cause a call trace, when resuming from suspend, due to
rdmsr_*on_cpu() calls in the init path. The rdmsr_*on_cpu() calls issue
an IPI but we're running with interrupts disabled. This triggers:
WARNING: CPU: 0 PID: 11523 at kernel/smp.c:291 smp_call_function_single+0xdc/0xe0
...
Reserved banks will be read-as-zero, so their MCA_IPID register will be
zero. So, like the smca_banks array, the threshold_banks array will not
have an entry for a reserved bank since all its MCA_MISC* registers will
be zero.
Enumerate a "Reserved" bank type that matches on a HWID_MCATYPE of 0,0.
Use the "Reserved" type when checking if a bank is reserved. It's
possible that other bank numbers may be reserved on future systems.
Don't try to find the block address on reserved banks.
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: <stable@vger.kernel.org> # 4.14.x Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/20180221101900.10326-7-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 68627a697c195937672ce07683094c72b1174786) Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Also, we should compare the bank number to MAX_NR_BANKS (size of the
smca_banks array) not the number of bank types. Bank types are reused
for multiple banks, so the number of types can be different from the
number of banks in a system and thus we could return an invalid bank
type.
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: <stable@vger.kernel.org> # 4.14.x Cc: <stable@vger.kernel.org> # 4.14.x: 11cf887728a3 x86/MCE/AMD: Define a function to get SMCA bank type Cc: <stable@vger.kernel.org> # 4.14.x: c6708d50f166 x86/MCE: Report only DRAM ECC as memory errors on AMD systems Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/20180221101900.10326-6-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit e5d6a126d4c473499f354254a15ca0c2d8c84ca3) Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Yazen Ghannam [Mon, 18 Dec 2017 11:37:12 +0000 (12:37 +0100)]
x86/MCE/AMD: Define a function to get SMCA bank type
BugLink: http://bugs.launchpad.net/bugs/1788897
Scalable MCA systems have various types of banks. The bank's type
can determine how we handle errors from it. For example, if a bank
represents a UMC (Unified Memory Controller) then we will need to
convert its address from a normalized address to a system physical
address before handling the error.
[ bp: Verify m->bank is within range and use bank pointer. ]
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20171207203955.118171-1-Yazen.Ghannam@amd.com Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
hid_sensor_set_power_work() powers the sensors back up after a resume
based on the user_requested_state atomic_t.
But hid_sensor_power_state() treats this as a boolean flag, leading to
the following problematic scenario:
1) Some app starts using the iio-sensor in buffered / triggered mode,
hid_sensor_data_rdy_trigger_set_state(true) gets called, setting
user_requested_state to 1.
2) Something directly accesses a _raw value through sysfs, leading
to a call to hid_sensor_power_state(true) followed by
hid_sensor_power_state(false) call, this sets user_requested_state
to 1 followed by setting it to 0.
3) Suspend/resume the machine, hid_sensor_set_power_work() now does
NOT power the sensor back up because user_requested_state (wrongly)
is 0. Which stops the app using the sensor in buffered mode from
receiving any new values.
This commit changes user_requested_state to a counter tracking how many
times hid_sensor_power_state(true) was called instead, fixing this.
Cc: Bastien Nocera <hadess@hadess.net> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Use kasprintf instead of combination of kmalloc and sprintf. Also,
remove the local variables used for storing the string length as they
are not required now.
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Delay registering ourselves with the acpi lid notification mechanism
until we are registering the connectors after initialisation is
complete. This prevents a possibility of trying to handle the lid
notification before we are ready with the danger of chasing
uninitialised function pointers.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106559 Fixes: c1c7af608920 ("drm/i915: force mode set at lid open time") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180518074840.16194-1-chris@chris-wilson.co.uk Cc: stable@vger.kernel.org
(cherry picked from commit e578a570dc7c20475774d1ff993825e3bd7a7011) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Entry corresponding to 220 us setup time was missing. I am not aware of
any specific bug this fixes, but this could potentially result in enabling
PSR on a panel with a higher setup time requirement than supported by the
hardware.
I verified the value is present in eDP spec versions 1.3, 1.4 and 1.4a.
Fixes: 6608804b3d7f ("drm/dp: Add drm_dp_psr_setup_time()") Cc: stable@vger.kernel.org Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jose Roberto de Souza <jose.souza@intel.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by: José Roberto de Souza <jose.souza@intel.com> Reviewed-by: Tarun Vyas <tarun.vyas@intel.com> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180511195145.3829-3-dhinakaran.pandiyan@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Commit d5c435df4a890 ("intel_th: msu: Use the real device in case of IOMMU
domain allocation") changes dma buffer allocation to use the actual
underlying device, but forgets to change the deallocation path, which leads
to (if you've got CAP_SYS_RAWIO):
> # echo 0,0 > /sys/bus/intel_th/devices/0-msc0/nr_pages
> ------------[ cut here ]------------
> kernel BUG at ../linux/drivers/iommu/intel-iommu.c:3670!
> CPU: 3 PID: 231 Comm: sh Not tainted 4.17.0-rc1+ #2729
> RIP: 0010:intel_unmap+0x11e/0x130
...
> Call Trace:
> intel_free_coherent+0x3e/0x60
> msc_buffer_win_free+0x100/0x160 [intel_th_msu]
This patch fixes the buffer deallocation code to use the correct device.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Fixes: d5c435df4a890 ("intel_th: msu: Use the real device in case of IOMMU domain allocation") Reported-by: Baofeng Tian <baofeng.tian@intel.com> CC: stable@vger.kernel.org # v4.14+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
In some situations when we set TXOP_BACKOFF, the probe frame is
not sent at all. What it worse then sending probe frame as part
of AMPDU and can degrade 11n performance to 11g rates.
Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Swapping load on huge=always tmpfs (with khugepaged tuned up to be very
eager, but I'm not sure that is relevant) soon hung uninterruptibly,
waiting for page lock in shmem_getpage_gfp()'s find_lock_entry(), most
often when "cp -a" was trying to write to a smallish file. Debug showed
that the page in question was not locked, and page->mapping NULL by now,
but page->index consistent with having been in a huge page before.
Reproduced in minutes on a 4.15 kernel, even with 4.17's 605ca5ede764
("mm/huge_memory.c: reorder operations in __split_huge_page_tail()") added
in; but took hours to reproduce on a 4.17 kernel (no idea why).
The culprit proved to be the __ClearPageDirty() on tails beyond i_size in
__split_huge_page(): the non-atomic __bitoperation may have been safe when
4.8's baa355fd3314 ("thp: file pages support for split_huge_page()")
introduced it, but liable to erase PageWaiters after 4.10's 62906027091f
("mm: add PageWaiters indicating tasks are waiting for a page bit").
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1805291841070.3197@eggly.anvils Fixes: 62906027091f ("mm: add PageWaiters indicating tasks are waiting for a page bit") Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
When a GID entry is invalid EAGAIN is returned. This is an incorrect error
code, there is nothing that will make this GID entry valid again in
bounded time.
Some user space tools fail incorrectly if EAGAIN is returned here, and
this represents a small ABI change from earlier kernels.
The first patch in the Fixes list makes entries that were valid before
to become invalid, allowing this code to trigger, while the second patch
in the Fixes list introduced the wrong EAGAIN.
Therefore revert the return result to EINVAL which matches the historical
expectations of the ibv_query_gid_type() API of the libibverbs user space
library.
Cc: <stable@vger.kernel.org> Fixes: 598ff6bae689 ("IB/core: Refactor GID modify code for RoCE") Fixes: 03db3a2d81e6 ("IB/core: Add RoCE GID table management") Reviewed-by: Daniel Jurgens <danielj@mellanox.com> Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Commit b5e2ced9bf81 ("stm class: Use vmalloc for the master map") caused
a build error on some arches as vmalloc.h was not explicitly included.
Fix that by adding it to the list of includes.
Fixes: b5e2ced9bf81 ("stm class: Use vmalloc for the master map") Reported-by: kbuild test robot <lkp@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Fengguang is running into a warning from the buddy allocator:
> swapper/0: page allocation failure: order:9, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null)
> CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.17.0-rc1 #262
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
> Call Trace:
...
> __kmalloc+0x14b/0x180: ____cache_alloc at mm/slab.c:3127
> stm_register_device+0xf3/0x5c0: stm_register_device at drivers/hwtracing/stm/core.c:695
...
Which is basically a result of the stm class trying to allocate ~512kB
for the dummy_stm with its default parameters. There's no reason, however,
for it not to be vmalloc()ed instead, which is what this patch does.
Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> CC: stable@vger.kernel.org # v4.4+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Since an SRP remote port is attached as a child to shost->shost_gendev
and as the only child, the translation from the shost pointer into an
rport pointer must happen by looking up the shost child that is an
rport. This patch fixes the following KASAN complaint:
BUG: KASAN: slab-out-of-bounds in srp_timed_out+0x57/0x110 [scsi_transport_srp]
Read of size 4 at addr ffff880035d3fcc0 by task kworker/1:0H/19
Having PR_FP_MODE_FRE (i.e. Config5.FRE) set without PR_FP_MODE_FR (i.e.
Status.FR) is not supported as the lone purpose of Config5.FRE is to
emulate Status.FR=0 handling on FPU hardware that has Status.FR=1
hardwired[1][2]. Also we do not handle this case elsewhere, and assume
throughout our code that TIF_HYBRID_FPREGS and TIF_32BIT_FPREGS cannot
be set both at once for a task, leading to inconsistent behaviour if
this does happen.
Return unsuccessfully then from prctl(2) PR_SET_FP_MODE calls requesting
PR_FP_MODE_FRE to be set with PR_FP_MODE_FR clear. This corresponds to
modes allowed by `mips_set_personality_fp'.
References:
[1] "MIPS Architecture For Programmers, Vol. III: MIPS32 / microMIPS32
Privileged Resource Architecture", Imagination Technologies,
Document Number: MD00090, Revision 6.02, July 10, 2015, Table 9.69
"Config5 Register Field Descriptions", p. 262
[2] "MIPS Architecture For Programmers, Volume III: MIPS64 / microMIPS64
Privileged Resource Architecture", Imagination Technologies,
Document Number: MD00091, Revision 6.03, December 22, 2015, Table
9.72 "Config5 Register Field Descriptions", p. 288
Fixes: 9791554b45a2 ("MIPS,prctl: add PR_[GS]ET_FP_MODE prctl options for MIPS") Signed-off-by: Maciej W. Rozycki <macro@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 4.0+
Patchwork: https://patchwork.linux-mips.org/patch/19327/ Signed-off-by: James Hogan <jhogan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Use 64-bit accesses for 64-bit floating-point general registers with
PTRACE_PEEKUSR, removing the truncation of their upper halves in the
FR=1 mode, caused by commit bbd426f542cb ("MIPS: Simplify FP context
access"), which inadvertently switched them to using 32-bit accesses.
The PTRACE_POKEUSR side is fine as it's never been broken and continues
using 64-bit accesses.
Fixes: bbd426f542cb ("MIPS: Simplify FP context access") Signed-off-by: Maciej W. Rozycki <macro@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 3.15+
Patchwork: https://patchwork.linux-mips.org/patch/19334/ Signed-off-by: James Hogan <jhogan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
While doing a global software reset, these bits are not cleared and let
some bootloader fail to initialise the GPHYs. The bootloader don't
expect the GPHYs in reset, as they aren't during power on.
The asserts were a workaround for a wrong syscon-reboot mask. With a
mask set which includes the GPHY resets, these resets aren't required
any more.
Fixes: 126534141b45 ("MIPS: lantiq: Add a GPHY driver which uses the RCU syscon-mfd") Signed-off-by: Mathias Kresin <dev@kresin.me> Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Acked-by: Hauke Mehrtens <hauke@hauke-m.de> Cc: John Crispin <john@phrozen.org> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 4.14+
Patchwork: https://patchwork.linux-mips.org/patch/19003/
[jhogan@kernel.org: Fix build warnings] Signed-off-by: James Hogan <jhogan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
We need to select the buffer code, otherwise we get build errors
with undefined functions on the trigger and buffer,
if we select just IIO and then AT91_SAMA5D2_ADC from menuconfig
This adds a Kconfig 'select' statement like other ADC
drivers have it already.
Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Note that using 1073741824 instead of 1073741825 causes "write error:
Cannot allocate memory" but no OOPS.
This is because 1073741824 == 2^30 and 1073741825 == 2^30+1. Since kfifo
rounds up to the nearest power of 2, it will actually call kmalloc with
roundup_pow_of_two(length) * bytes_per_datum.
Using length == 1073741825 and bytes_per_datum == 2, we get:
so this overflows to 0, causing kmalloc to return ZERO_SIZE_PTR and
subsequent memcpy to fail once the device is enabled.
Fix this by checking for overflow prior to allocating a kfifo. With this
check added, the above code returns -EINVAL when enabling the buffer,
rather than causing an OOPS.
Signed-off-by: Martin Kelly <mkelly@xevo.com>
cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Currently, we use int for buffer length and bytes_per_datum. However,
kfifo uses unsigned int for length and size_t for element size. We need
to make sure these matches or we will have bugs related to overflow (in
the range between INT_MAX and UINT_MAX for length, for example).
In addition, set_bytes_per_datum uses size_t while bytes_per_datum is an
int, which would cause bugs for large values of bytes_per_datum.
Change buffer length to use unsigned int and bytes_per_datum to use
size_t.
Signed-off-by: Martin Kelly <mkelly@xevo.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
This commit is a follow-up to changes made to ad_sigma_delta.h
in staging: iio: ad7192: implement IIO_CHAN_INFO_SAMP_FREQ
which broke ad7793 as it was not altered to match those changes.
This driver predates the availability of IIO_CHAN_INFO_SAMP_FREQ
attribute wherein usage has some advantages like it can be accessed by
in-kernel consumers as well as reduces the code size.
Therefore, use IIO_CHAN_INFO_SAMP_FREQ to implement the
sampling_frequency attribute instead of using IIO_DEV_ATTR_SAMP_FREQ()
macro.
Move code from the functions associated with IIO_DEV_ATTR_SAMP_FREQ()
into respective read and write hooks with the mask set to
IIO_CHAN_INFO_SAMP_FREQ.
Fixes: a13e831fcaa7 ("staging: iio: ad7192: implement IIO_CHAN_INFO_SAMP_FREQ") Signed-off-by: Michael Nosthoff <committed@heine.so> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
When using large tcp_rmem[2] values (I did tests with 500 MB),
I noticed overflows while computing rcvwin.
Lets fix this before the following patch.
Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Wei Wang <weiwan@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
[Backport: sysctl_tcp_rmem is not Namespace-ify'd in older kernels] Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Currently, GCC disables -Wunused-const-variable, but not
-Wunused-variable, so warns unused variables if they are
non-constant.
While, Clang does not warn unused variables at all regardless of
the const qualifier because -Wno-unused-const-variable is implied
by the stronger option -Wno-unused-variable.
Disable -Wunused-const-variable instead of -Wunused-variable so that
GCC and Clang work in the same way.
In _rtl92c_get_txpower_writeval_by_regulatory() the variable writeVal
is assigned to itself in an if ... else statement, apparently only to
document that the branch condition is handled and that a previously read
value should be returned unmodified. The self-assignment causes clang to
raise the following warning:
drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c:304:13:
error: explicitly assigning value of variable of type 'u32'
(aka 'unsigned int') to itself [-Werror,-Wself-assign]
writeVal = writeVal;
Delete the branch with the self-assignment.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Reviewed-by: Guenter Roeck <groeck@chromium.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
In several locations the driver uses AMD_CG_STATE_UNGATE (type enum
amd_clockgating_state) instead of AMD_PG_STATE_UNGATE (type enum
amd_powergating_stat) and vice versa. Both constants have the same
value, so this doesn't cause any problems, but we still want to pass
the correct type.
Fixing the mismatch resolves multiple warnings like this when building
with clang:
drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/cz_clockpowergating.c:169:7:
error: implicit conversion from enumeration type 'enum
amd_powergating_state' to different enumeration type 'enum
amd_clockgating_state' [-Werror,-Wenum-conversion]
AMD_PG_STATE_UNGATE);
Reviewed-by: Guenter Roeck <groeck@chromium.org> Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
wiphy names were recently limited to 128 bytes by commit a7cfebcb7594
("cfg80211: limit wiphy names to 128 bytes"). As it turns out though,
this isn't sufficient because dev_vprintk_emit() needs the syslog header
string "SUBSYSTEM=ieee80211\0DEVICE=+ieee80211:$devname" to fit into 128
bytes. This triggered the "device/subsystem name too long" WARN when
the device name was >= 90 bytes. As before, this was reproduced by
syzbot by sending an HWSIM_CMD_NEW_RADIO command to the MAC80211_HWSIM
generic netlink family.
Fix it by further limiting wiphy names to 64 bytes.
Reported-by: syzbot+e64565577af34b3768dc@syzkaller.appspotmail.com Fixes: a7cfebcb7594 ("cfg80211: limit wiphy names to 128 bytes") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
If user get root access and calls security.selinux setxattr() with an
embedded NUL on a file and then if some process performs a getxattr()
on that file with a length greater than the actual length of the string,
it would result in a panic.
To fix this, add the actual length of the string to the security context
instead of the length passed by the userspace process.
Signed-off-by: Sachin Grover <sgrover@codeaurora.org> Cc: stable@vger.kernel.org Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
The snapshot trigger currently only affects the main ring buffer, even when
it is used by the instances. This can be confusing as the snapshot trigger
is listed in the instance.
> # cd /sys/kernel/tracing
> # mkdir instances/foo
> # echo snapshot > instances/foo/events/syscalls/sys_enter_fchownat/trigger
> # echo top buffer > trace_marker
> # echo foo buffer > instances/foo/trace_marker
> # touch /tmp/bar
> # chown rostedt /tmp/bar
> # cat instances/foo/snapshot
# tracer: nop
#
#
# * Snapshot is freed *
#
# Snapshot commands:
# echo 0 > snapshot : Clears and frees snapshot buffer
# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.
# Takes a snapshot of the main buffer.
# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)
# (Doesn't have to be '2' works with any number that
# is not a '0' or '1')
New ICs (like the one on the Lenovo T480s) answer to
ETP_SMBUS_IAP_VERSION_CMD 4 bytes instead of 3. This corrupts the stack
as i2c_smbus_read_block_data() uses the values returned by the i2c
device to know how many data it need to return.
i2c_smbus_read_block_data() can read up to 32 bytes (I2C_SMBUS_BLOCK_MAX)
and there is no safeguard on how many bytes are provided in the return
value. Ensure we always have enough space for any future firmware.
Also 0-initialize the values to prevent any access to uninitialized memory.
This time, Lenovo decided to go with different pieces in its latest
series of Thinkpads.
For those we have been able to test:
- the T480 is using Synaptics with an IBM trackpoint
-> it behaves properly with or without intertouch, there is no point
not using RMI4
- the X1 Carbon 6th gen is using Synaptics with an IBM trackpoint
-> the touchpad doesn't behave properly under PS/2 so we have to
switch it to RMI4 if we do not want to have disappointed users
- the X280 is using Synaptics with an ALPS trackpoint
-> the recent fixes in the trackpoint handling fixed it so upstream
now works fine with or without RMI4, and there is no point not
using RMI4
- the T480s is using an Elan touchpad, so that's a different story
The struct xfs_agfl v5 header was originally introduced with
unexpected padding that caused the AGFL to operate with one less
slot than intended. The header has since been packed, but the fix
left an incompatibility for users who upgrade from an old kernel
with the unpacked header to a newer kernel with the packed header
while the AGFL happens to wrap around the end. The newer kernel
recognizes one extra slot at the physical end of the AGFL that the
previous kernel did not. The new kernel will eventually attempt to
allocate a block from that slot, which contains invalid data, and
cause a crash.
This condition can be detected by comparing the active range of the
AGFL to the count. While this detects a padding mismatch, it can
also trigger false positives for unrelated flcount corruption. Since
we cannot distinguish a size mismatch due to padding from unrelated
corruption, we can't trust the AGFL enough to simply repopulate the
empty slot.
Instead, avoid unnecessarily complex detection logic and and use a
solution that can handle any form of flcount corruption that slips
through read verifiers: distrust the entire AGFL and reset it to an
empty state. Any valid blocks within the AGFL are intentionally
leaked. This requires xfs_repair to rectify (which was already
necessary based on the state the AGFL was found in). The reset
mitigates the side effect of the padding mismatch problem from a
filesystem crash to a free space accounting inconsistency. The
generic approach also means that this patch can be safely backported
to kernels with or without a packed struct xfs_agfl.
Check the AGF for an invalid freelist count on initial read from
disk. If detected, set a flag on the xfs_perag to indicate that a
reset is required before the AGFL can be used. In the first
transaction that attempts to use a flagged AGFL, reset it to empty,
warn the user about the inconsistency and allow the freelist fixup
code to repopulate the AGFL with new blocks. The xfs_perag flag is
cleared to eliminate the need for repeated checks on each block
allocation operation.
This allows kernels that include the packing fix commit 96f859d52bcb
("libxfs: pack the agfl header structure so XFS_AGFL_SIZE is correct")
to handle older unpacked AGFL formats without a filesystem crash.
Suggested-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by Dave Chiluk <chiluk+linuxxfs@indeed.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
The AGFL size calculation is about to get more complex, so lets turn
the macro into a function first and remove the macro.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
[darrick: forward port to newer kernel, simplify the helper] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Objtool has some crude logic for detecting static "noreturn" functions
(aka "dead ends"). This is necessary for being able to correctly follow
GCC code flow when such functions are called.
It's remotely possible for two functions to call each other via sibling
calls. If they don't have RET instructions, objtool's noreturn
detection logic goes into a recursive loop:
fd35c88b7417 ("objtool: Support GCC 8 switch tables")
I added a "can't find switch jump table" warning, to stop covering up
silent failures if add_switch_table() can't find anything.
That warning found yet another bug in the objtool switch table detection
logic. For cases 1 and 2 (as described in the comments of
find_switch_table()), the find_symbol_containing() check doesn't adjust
the offset for RIP-relative switch jumps.
Incidentally, this bug was already fixed for case 3 with:
However, that commit missed the fix for cases 1 and 2.
The different cases are now starting to look more and more alike. So
fix the bug by consolidating them into a single case, by checking the
original dynamic jump instruction in the case 3 loop.
This also simplifies the code and makes it more robust against future
switch table detection issues -- of which I'm sure there will be many...
Switch table detection has been the most fragile area of objtool, by
far. I long for the day when we'll have a GCC plugin for annotating
switch tables. Linus asked me to delay such a plugin due to the
flakiness of the plugin infrastructure in older versions of GCC, so this
rickety code is what we're stuck with for now. At least the code is now
a little simpler than it was.
Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/f400541613d45689086329432f3095119ffbc328.1526674218.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
In this case the relocation addend needs to be adjusted accordingly in
order to find the location of the switch table.
The fix is for case 3 (as described in the comments), but also make the
existing case 1 & 2 checks more precise by only adjusting the addend for
R_X86_64_PC32 relocations.
This fixes the following warnings:
drivers/video/fbdev/omap2/omapfb/dss/dispc.o: warning: objtool: dispc_runtime_suspend()+0xbb8: sibling call from callable instruction with modified stack frame
drivers/video/fbdev/omap2/omapfb/dss/dispc.o: warning: objtool: dispc_runtime_resume()+0xcc5: sibling call from callable instruction with modified stack frame
Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/b6098294fd67afb69af8c47c9883d7a68bf0f8ea.1526305958.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
With GCC 8, some issues were found with the objtool switch table
detection.
1) In the .rodata section, immediately after the switch table, there can
be another object which contains a pointer to the function which had
the switch statement. In this case objtool wrongly considers the
function pointer to be part of the switch table. Fix it by:
a) making sure there are no pointers to the beginning of the
function; and
b) making sure there are no gaps in the switch table.
Only the former was needed, the latter adds additional protection for
future optimizations.
2) In find_switch_table(), case 1 and case 2 are missing the check to
ensure that the .rodata switch table data is anonymous, i.e. that it
isn't already associated with an ELF symbol. Fix it by adding the
same find_symbol_containing() check which is used for case 3.
This fixes the following warnings with GCC 8:
drivers/block/virtio_blk.o: warning: objtool: virtio_queue_rq()+0x0: stack state mismatch: cfa1=7+8 cfa2=7+72
net/ipv6/icmp.o: warning: objtool: icmpv6_rcv()+0x0: stack state mismatch: cfa1=7+8 cfa2=7+64
drivers/usb/core/quirks.o: warning: objtool: quirks_param_set()+0x0: stack state mismatch: cfa1=7+8 cfa2=7+48
drivers/mtd/nand/raw/nand_hynix.o: warning: objtool: hynix_nand_decode_id()+0x0: stack state mismatch: cfa1=7+8 cfa2=7+24
drivers/mtd/nand/raw/nand_samsung.o: warning: objtool: samsung_nand_decode_id()+0x0: stack state mismatch: cfa1=7+8 cfa2=7+32
drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.o: warning: objtool: gk104_top_oneinit()+0x0: stack state mismatch: cfa1=7+8 cfa2=7+64
Reported-by: Arnd Bergmann <arnd@arndb.de> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: damian <damian.tometzki@icloud.com> Link: http://lkml.kernel.org/r/20180510224849.xwi34d6tzheb5wgw@treble Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
GCC 8 moves a lot of unlikely code out of line to "cold" subfunctions in
.text.unlikely. Properly detect the new subfunctions and treat them as
extensions of the original functions.
This fixes a bunch of warnings like:
kernel/cgroup/cgroup.o: warning: objtool: parse_cgroup_root_flags()+0x33: sibling call from callable instruction with modified stack frame
kernel/cgroup/cgroup.o: warning: objtool: cgroup_addrm_files()+0x290: sibling call from callable instruction with modified stack frame
kernel/cgroup/cgroup.o: warning: objtool: cgroup_apply_control_enable()+0x25b: sibling call from callable instruction with modified stack frame
kernel/cgroup/cgroup.o: warning: objtool: rebind_subsystems()+0x325: sibling call from callable instruction with modified stack frame
Reported-and-tested-by: damian <damian.tometzki@icloud.com> Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/0965e7fcfc5f31a276f0c7f298ff770c19b68706.1525923412.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
George Boole would have noticed a slight error in 4.16 commit 69d763fc6d3a ("mm: pin address_space before dereferencing it while
isolating an LRU page"). Fix it, to match both the comment above it,
and the original behaviour.
Although anonymous pages are not marked PageDirty at first, we have an
old habit of calling SetPageDirty when a page is removed from swap
cache: so there's a category of ex-swap pages that are easily
migratable, but were inadvertently excluded from compaction's async
migration in 4.16.
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1805302014001.12558@eggly.anvils Fixes: 69d763fc6d3a ("mm: pin address_space before dereferencing it while isolating an LRU page") Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Mel Gorman <mgorman@techsingularity.net> Reported-by: Ivan Kalvachev <ikalvachev@gmail.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
If io_destroy() gets to cancelling everything that can be cancelled and
gets to kiocb_cancel() calling the function driver has left in ->ki_cancel,
it becomes vulnerable to a race with IO completion. At that point req
is already taken off the list and aio_complete() does *NOT* spin until
we (in free_ioctx_users()) releases ->ctx_lock. As the result, it proceeds
to kiocb_free(), freing req just it gets passed to ->ki_cancel().
Fix is simple - remove from the list after the call of kiocb_cancel(). All
instances of ->ki_cancel() already have to cope with the being called with
iocb still on list - that's what happens in io_cancel(2).
Cc: stable@kernel.org Fixes: 0460fef2a921 "aio: use cancellation list lazily" Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
partitions/aix: append null character to print data from disk
BugLink: https://bugs.launchpad.net/bugs/1787281
Even if properly initialized, the lvname array (i.e., strings)
is read from disk, and might contain corrupt data (e.g., lack
the null terminating character for strings).
So, make sure the partition name string used in pr_warn() has
the null terminating character.
Fixes: 6ceea22bbbc8 ("partitions: add aix lvm partition support files") Suggested-by: Daniel J. Axtens <daniel.axtens@canonical.com> Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit d43fdae7bac2def8c4314b5a49822cb7f08a45f1) Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com> Acked-by: Seth Forshee <seth.forshee@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
partitions/aix: fix usage of uninitialized lv_info and lvname structures
BugLink: https://bugs.launchpad.net/bugs/1787281
The if-block that sets a successful return value in aix_partition()
uses 'lvip[].pps_per_lv' and 'n[].name' potentially uninitialized.
For example, if 'numlvs' is zero or alloc_lvn() fails, neither is
initialized, but are used anyway if alloc_pvd() succeeds after it.
So, make the alloc_pvd() call conditional on their initialization.
This has been hit when attaching an apparently corrupted/stressed
AIX LUN, misleading the kernel to pr_warn() invalid data and hang.
[...] partition (null) (11 pp's found) is not contiguous
[...] partition (null) (2 pp's found) is not contiguous
[...] partition (null) (3 pp's found) is not contiguous
[...] partition (null) (64 pp's found) is not contiguous
Fixes: 6ceea22bbbc8 ("partitions: add aix lvm partition support files") Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit 14cb2c8a6c5dae57ee3e2da10fa3db2b9087e39e) Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com> Acked-by: Seth Forshee <seth.forshee@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
powerpc/mm/radix: Change pte relax sequence to handle nest MMU hang
BugLink: https://bugs.launchpad.net/bugs/1789772
When relaxing access (read -> read_write update), pte needs to be marked invalid
to handle a nest MMU bug. We also need to do a tlb flush after the pte is
marked invalid before updating the pte with new access bits.
We also move tlb flush to platform specific __ptep_set_access_flags. This will
help us to gerid of unnecessary tlb flush on BOOK3S 64 later. We don't do that
in this patch. This also helps in avoiding multiple tlbies with coprocessor
attached.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry-picked from bd5050e38aec3055ff4257ade987d808ac93b582) Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Joseph Salisbury <joseph.salisbury@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
BugLink: https://bugs.launchpad.net/bugs/1789772
In later patch, we use the vma and psize to do tlb flush. Do the prototype
update in separate patch to make the review easy.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry-picked from e4c1112c3fc503fc78379fa61450bfda3f0717fe) Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Joseph Salisbury <joseph.salisbury@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
powerpc/mm/radix: Move function from radix.h to pgtable-radix.c
BugLink: https://bugs.launchpad.net/bugs/1789772
In later patch we will update them which require them to be moved
to pgtable-radix.c. Keeping the function in radix.h results in
compile warning as below.
./arch/powerpc/include/asm/book3s/64/radix.h: In function ‘radix__ptep_set_access_flags’:
./arch/powerpc/include/asm/book3s/64/radix.h:196:28: error: dereferencing pointer to incomplete type ‘struct vm_area_struct’
struct mm_struct *mm = vma->vm_mm;
^~
./arch/powerpc/include/asm/book3s/64/radix.h:204:6: error: implicit declaration of function ‘atomic_read’; did you mean ‘__atomic_load’? [-Werror=implicit-function-declaration]
atomic_read(&mm->context.copros) > 0) {
^~~~~~~~~~~
__atomic_load
./arch/powerpc/include/asm/book3s/64/radix.h:204:21: error: dereferencing pointer to incomplete type ‘struct mm_struct’
atomic_read(&mm->context.copros) > 0) {
Instead of fixing header dependencies, we move the function to pgtable-radix.c
Also the function is now large to be a static inline . Doing the
move in separate patch helps in review.
No functional change in this patch. Only code movement.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry-picked from 044003b52a78bcbda7103633c351da16505096cf) Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Joseph Salisbury <joseph.salisbury@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
powerpc/mm/hugetlb: Update huge_ptep_set_access_flags to call __ptep_set_access_flags directly
BugLink: https://bugs.launchpad.net/bugs/1789772
In a later patch, we want to update __ptep_set_access_flags take page size
arg. This makes ptep_set_access_flags only work with mmu_virtual_psize.
To simplify the code make huge_ptep_set_access_flags directly call
__ptep_set_access_flags so that we can compute the hugetlb page size in
hugetlb function.
Now that ptep_set_access_flags won't be called for hugetlb remove
the is_vm_hugetlb_page() check and add the assert of pte lock
unconditionally.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry-picked from f069ff396d657ac7bdb5de866c3ec28b8d08d953) Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Joseph Salisbury <joseph.salisbury@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Reza Arbab [Thu, 30 Aug 2018 19:44:00 +0000 (21:44 +0200)]
powerpc/powernv: Fix concurrency issue with npu->mmio_atsd_usage
BugLink: https://bugs.launchpad.net/bugs/1788097
We've encountered a performance issue when multiple processors stress
{get,put}_mmio_atsd_reg(). These functions contend for
mmio_atsd_usage, an unsigned long used as a bitmask.
The accesses to mmio_atsd_usage are done using test_and_set_bit_lock()
and clear_bit_unlock(). As implemented, both of these will require
a (successful) stwcx to that same cache line.
What we end up with is thread A, attempting to unlock, being slowed by
other threads repeatedly attempting to lock. A's stwcx instructions
fail and retry because the memory reservation is lost every time a
different thread beats it to the punch.
There may be a long-term way to fix this at a larger scale, but for
now resolve the immediate problem by gating our call to
test_and_set_bit_lock() with one to test_bit(), which is obviously
implemented without using a store.
Fixes: 1ab66d1fbada ("powerpc/powernv: Introduce address translation services for Nvlink2") Signed-off-by: Reza Arbab <arbab@linux.ibm.com> Acked-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry-picked from 9eab9901b015f489199105c470de1ffc337cfabb) Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Arnd Bergmann [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
ACPI: fix menuconfig presentation of ACPI submenu
BugLink: https://bugs.launchpad.net/bugs/1786878
My fix for a recursive Kconfig dependency caused another issue where the
ACPI specific options end up in the top-level menu in 'menuconfig'. This
was an unintended side-effect of having a silent option between
'menuconfig ACPI' and 'if ACPI'.
Moving the ARCH_SUPPORTS_ACPI symbol ahead of the ACPI menu solves that
problem and restores the previous presentation.
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Fixes: 2c870e61132c (arm64: fix ACPI dependencies) Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit f5d707ede37a962bc3cb9b3f8531a870dae29e46) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
drivers/acpi/Kconfig:6:error: recursive dependency detected!
drivers/acpi/Kconfig:6: symbol ACPI depends on EFI
This rephrases the dependency to keep the ARM64 details out of the
shared Kconfig file, so Kconfig no longer gets confused by it.
For consistency, all three architectures that support ACPI now
select ARCH_SUPPORTS_ACPI in exactly the configuration in which
they allow it. We still need the 'default x86', as each one
wants a different default: default-y on x86, default-n on arm64,
and always-y on ia64.
Fixes: 5bcd44083a08 ("drivers: acpi: add dependency of EFI for arm64") Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 2c870e61132c082a03769d2ac0a2849ba33c10e3) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
dann frazier [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
UBUNTU: [Config] CONFIG_ARCH_SUPPORTS_ACPI=y
BugLink: https://bugs.launchpad.net/bugs/1786878 Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
AKASHI Takahiro [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
arm64: acpi: fix alignment fault in accessing ACPI
BugLink: https://bugs.launchpad.net/bugs/1786878
This is a fix against the issue that crash dump kernel may hang up
during booting, which can happen on any ACPI-based system with "ACPI
Reclaim Memory."
(diagnosis)
* This fault is a data abort, alignment fault (ESR=0x96000021)
during reading out ACPI table.
* Initial ACPI tables are normally stored in system ram and marked as
"ACPI Reclaim memory" by the firmware.
* After the commit f56ab9a5b73c ("efi/arm: Don't mark ACPI reclaim
memory as MEMBLOCK_NOMAP"), those regions are differently handled
as they are "memblock-reserved", without NOMAP bit.
* So they are now excluded from device tree's "usable-memory-range"
which kexec-tools determines based on a current view of /proc/iomem.
* When crash dump kernel boots up, it tries to accesses ACPI tables by
mapping them with ioremap(), not ioremap_cache(), in acpi_os_ioremap()
since they are no longer part of mapped system ram.
* Given that ACPI accessor/helper functions are compiled in without
unaligned access support (ACPI_MISALIGNMENT_NOT_SUPPORTED),
any unaligned access to ACPI tables can cause a fatal panic.
With this patch, acpi_os_ioremap() always honors memory attribute
information provided by the firmware (EFI) and retaining cacheability
allows the kernel safe access to ACPI tables.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: James Morse <james.morse@arm.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reported-by and Tested-by: Bhupesh Sharma <bhsharma@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 09ffcb0d718a0b100f0bed029b830987ecf53fab) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
AKASHI Takahiro [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
efi/arm: map UEFI memory map even w/o runtime services enabled
BugLink: https://bugs.launchpad.net/bugs/1786878
Under the current implementation, UEFI memory map will be mapped and made
available in virtual mappings only if runtime services are enabled.
But in a later patch, we want to use UEFI memory map in acpi_os_ioremap()
to create mappings of ACPI tables using memory attributes described in
UEFI memory map.
See the following commit:
arm64: acpi: fix alignment fault in accessing ACPI tables
So, as a first step, arm_enter_runtime_services() is modified, alongside
Ard's patch[1], so that UEFI memory map will not be freed even if
efi=noruntime.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 20d12cf990618845e76d3f24daaebd15d65a5e46) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Ard Biesheuvel [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
efi/arm: preserve early mapping of UEFI memory map longer for BGRT
BugLink: https://bugs.launchpad.net/bugs/1786878
The BGRT code validates the contents of the table against the UEFI
memory map, and so it expects it to be mapped when the code runs.
On ARM, this is currently not the case, since we tear down the early
mapping after efi_init() completes, and only create the permanent
mapping in arm_enable_runtime_services(), which executes as an early
initcall, but still leaves a window where the UEFI memory map is not
mapped.
So move the call to efi_memmap_unmap() from efi_init() to
arm_enable_runtime_services().
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[will: fold in EFI_MEMMAP attribute check from Ard] Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 3ea86495aef2f6de26b7cb1599ba350dd6a0c521) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
AKASHI Takahiro [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
drivers: acpi: add dependency of EFI for arm64
BugLink: https://bugs.launchpad.net/bugs/1786878
As Ard suggested, CONFIG_ACPI && !CONFIG_EFI doesn't make sense on arm64,
while CONFIG_ACPI and CONFIG_CPU_BIG_ENDIAN doesn't make sense either.
As CONFIG_EFI already has a dependency of !CONFIG_CPU_BIG_ENDIAN, it is
good enough to add a dependency of CONFIG_EFI to avoid any useless
combination of configuration.
This bug, reported by Will, will be revealed when my patch series,
"arm64: kexec,kdump: fix boot failures on acpi-only system," is applied
and the kernel is built under allmodconfig.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 5bcd44083a082f314032969cd6db1eb8275ac77a) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
James Morse [Tue, 28 Aug 2018 20:47:00 +0000 (22:47 +0200)]
arm64: export memblock_reserve()d regions via /proc/iomem
BugLink: https://bugs.launchpad.net/bugs/1786878
There has been some confusion around what is necessary to prevent kexec
overwriting important memory regions. memblock: reserve, or nomap?
Only memblock nomap regions are reported via /proc/iomem, kexec's
user-space doesn't know about memblock_reserve()d regions.
Until commit f56ab9a5b73ca ("efi/arm: Don't mark ACPI reclaim memory
as MEMBLOCK_NOMAP") the ACPI tables were nomap, now they are reserved
and thus possible for kexec to overwrite with the new kernel or initrd.
But this was always broken, as the UEFI memory map is also reserved
and not marked as nomap.
Exporting both nomap and reserved memblock types is a nuisance as
they live in different memblock structures which we can't walk at
the same time.
Take a second walk over memblock.reserved and add new 'reserved'
subnodes for the memblock_reserved() regions that aren't already
described by the existing code. (e.g. Kernel Code)
We use reserve_region_with_split() to find the gaps in existing named
regions. This handles the gap between 'kernel code' and 'kernel data'
which is memblock_reserve()d, but already partially described by
request_standard_resources(). e.g.:
| 80000000-dfffffff : System RAM
| 80080000-80ffffff : Kernel code
| 81000000-8158ffff : reserved
| 81590000-8237efff : Kernel data
| a0000000-dfffffff : Crash kernel
| e00f0000-f949ffff : System RAM
reserve_region_with_split needs kzalloc() which isn't available when
request_standard_resources() is called, use an initcall.
Reported-by: Bhupesh Sharma <bhsharma@redhat.com> Reported-by: Tyler Baicar <tbaicar@codeaurora.org> Suggested-by: Akashi Takahiro <takahiro.akashi@linaro.org> Signed-off-by: James Morse <james.morse@arm.com> Fixes: d28f6df1305a ("arm64/kexec: Add core kexec support") Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> CC: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 50d7ba36b916d0fd4687149ec143bf49c326523f) Signed-off-by: dann frazier <dann.frazier@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Kai-Heng Feng [Tue, 28 Aug 2018 08:24:00 +0000 (10:24 +0200)]
r8152: disable RX aggregation on new Dell TB16 dock
There's a new Dell TB16 dock with a different iSerialNumber.
Apply the same fix from commit 0b1655143df0 ("r8152: disable RX
aggregation on Dell TB16 dock") to this model.
BugLink: https://bugs.launchpad.net/bugs/1785780 Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 176eb614b118c96e7797f5ddefd10708c316f621) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: Hui Wang <hui.wang@canonical.com> Acked-by: Anthony Wong <anthony.wong@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
When Fn-lock hotkey gets pressed to switch to function mode:
[85951.591542] dell_wmi: Unknown key with type 0x0010 and code 0xe035
pressed
[85951.591546] dell_wmi: Unknown key with type 0x0010 and code 0x0000
pressed
When Fn-lock hotkey gets pressed to switch to multimedia mode:
[85956.667686] dell_wmi: Unknown key with type 0x0010 and code 0xe035
pressed
[85956.667690] dell_wmi: Unknown key with type 0x0010 and code 0x0001
pressed
When radio hotkey gets pressed:
[85974.430220] dell_wmi: Unknown key with type 0x0010 and code 0xe008
pressed
These events are for notification purpose, so we can ignore them.
This patch is tested on XPS 9370.
Reviewed-by: Pali Rohár <pali.rohar@gmail.com> Reviewed-by: Mario Limonciello <mario.limonciello@dell.com> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
(backported from commit 64b824649b7787c9ac491015f16ffa4ad2ec287e) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Acked-by: Shrirang Bagul <shrirang.bagul@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
BugLink: https://bugs.launchpad.net/bugs/1773940 Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: AceLan Kao <acelan.kao@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Modify the Kconfig to adress that, so it won't break on architectures
that don't support ACPI.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: AceLan Kao <acelan.kao@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
UBUNTU: SAUCE: i2c:amd move out pointer in union i2c_event_base
BugLink: https://bugs.launchpad.net/bugs/1773940
"Unable to handle kernel paging request" occurs at this line of code:
privdata->eventval.buf[i] = readdata;
The pointer "buf" in union "i2c_event_base" will change its value as
soon as any union member gets modified. We can observe this behaviour in
amd_mp2_irq_isr(). This makes buf points to the wrong place, and causes
the trouble we saw when it gets accessed.
Put pointer inside union is not a good idea, so refactor the structure
to make sure the pointer and the union do not overlap.
Also remove the NULL check for eventval.buf, as its value comes from
read_cfg.buf.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: AceLan Kao <acelan.kao@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
UBUNTU: SAUCE: i2c:amd I2C Driver based on PCI Interface for upcoming platform
BugLink: https://bugs.launchpad.net/bugs/1773940
Added fix for suspend resume and touchpad lost issue
Added fix for IOMMU
This contains two drivers.
1)i2c-amd-platdrv: This is based on I2C framework of
linux kernel. So any i2c read write call or commands
to this driver is routed to PCI Interface driver.
2) i2c-amd-platdrv: This driver is responsible to
talk with Mp2 and does all C2P/P2C communication
or reading/writing from DRAM in case of more
data.
Reviewed-by: S-k, Shyam-sundar <Shyam-sundar.S-k@amd.com> Reviewed-by: Sandeep Singh <sandeep.singh@amd.com> Signed-off-by: Nehal-bakulchandra Shah <Nehal-bakulchandra.Shah@amd.com> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: AceLan Kao <acelan.kao@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Jian-Hong Pan [Mon, 27 Aug 2018 04:36:00 +0000 (06:36 +0200)]
r8169: don't use MSI-X on RTL8106e
BugLink: https://bugs.launchpad.net/bugs/1779817
Found the ethernet network on ASUS X441UAR doesn't come back on resume
from suspend when using MSI-X. The chip is RTL8106e - version 39.
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136]
(rev 07)
Subsystem: ASUSTeK Computer Inc. RTL810xE PCI Express Fast
Ethernet controller [1043:200f]
Flags: bus master, fast devsel, latency 0, IRQ 16
I/O ports at e000 [size=256]
Memory at ef100000 (64-bit, non-prefetchable) [size=4K]
Memory at e0000000 (64-bit, prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169
Falling back to MSI fixes the issue.
Fixes: 6c6aa15fdea5 ("r8169: improve interrupt handling") Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(backported from commit 7bb05b85bc2d1a1b647b91424b2ed4a18e6ecd81) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Anthony Wong <anthony.wong@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Heiner Kallweit [Mon, 27 Aug 2018 04:36:00 +0000 (06:36 +0200)]
r8169: don't use MSI-X on RTL8168g
BugLink: https://bugs.launchpad.net/bugs/1779817
There have been two reports that network doesn't come back on resume
from suspend when using MSI-X. Both cases affect the same chip version
(RTL8168g - version 40), on different systems. Falling back to MSI
fixes the issue.
Even though we don't really have a proof yet that the network chip
version is to blame, let's disable MSI-X for this version.
Reported-by: Steve Dodd <steved424@gmail.com> Reported-by: Lou Reed <gogen@disroot.org> Tested-by: Steve Dodd <steved424@gmail.com> Tested-by: Lou Reed <gogen@disroot.org> Fixes: 6c6aa15fdea5 ("r8169: improve interrupt handling") Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 7c53a722459c1d6ffb0f5b2058c06ca8980b8600) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Anthony Wong <anthony.wong@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Heiner Kallweit [Mon, 27 Aug 2018 04:36:00 +0000 (06:36 +0200)]
r8169: restore previous behavior to accept BIOS WoL settings
BugLink: https://bugs.launchpad.net/bugs/1779817
Commit 7edf6d314cd0 tried to resolve an inconsistency (BIOS WoL
settings are accepted, but device isn't wakeup-enabled) resulting
from a previous broken-BIOS workaround by making disabled WoL the
default.
This however had some side effects, most likely due to a broken BIOS
some systems don't properly resume from suspend when the MagicPacket
WoL bit isn't set in the chip, see
https://bugzilla.kernel.org/show_bug.cgi?id=200195
Therefore restore the WoL behavior from 4.16.
Reported-by: Albert Astals Cid <aacid@kde.org> Fixes: 7edf6d314cd0 ("r8169: disable WOL per default") Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 18041b523692038d41751fd8046638c356d77a36) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Anthony Wong <anthony.wong@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Jarkko Nikula [Thu, 30 Aug 2018 03:54:00 +0000 (05:54 +0200)]
mfd: intel-lpss: Fix Intel Cannon Lake LPSS I2C input clock
BugLink: https://bugs.launchpad.net/bugs/1789790
Intel Cannon Lake PCH has much higher 216 MHz input clock to LPSS I2C
than Sunrisepoint which uses 120 MHz. Preliminary information was that
both share the same clock rate but actual silicon implements elevated
rate for better support for 3.4 MHz high-speed I2C.
This incorrect input clock rate results too high I2C bus clock in case
ACPI doesn't provide tuned I2C timing parameters since I2C host
controller driver calculates them from input clock rate.
Fix this by using the correct rate. We still share the same 230 ns SDA
hold time value than Sunrisepoint.
Cc: stable@vger.kernel.org Fixes: b418bbff36dd ("mfd: intel-lpss: Add Intel Cannonlake PCI IDs") Reported-by: Jian-Hong Pan <jian-hong@endlessm.com> Reported-by: Chris Chiu <chiu@endlessm.com> Reported-by: Daniel Drake <drake@endlessm.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Jian-Hong Pan <jian-hong@endlessm.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
(cherry picked from commit 4e93a658576ab115977225c9d0992b97ff19ba8c) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Paolo Pisati [Mon, 27 Aug 2018 09:18:00 +0000 (11:18 +0200)]
UBUNTU: [Config] disable ARCH_TANGO
BugLink: https://bugs.launchpad.net/bugs/1787945
The TANGO platform is enabled by default in the multiplatform ARM kernel.
However, it calls __initcall in arch/arm/mach-tango/pm.c without a check whether
it actually runs on this hw. This causes an OOPS during suspend on my Tegra
platform. Please disable this (multiplatform incompatible) arch.
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Seth Forshee <seth.forshee@canonical.com>
[ kleber: remove tango-ir and tango_nand modules from prebious ABI's
modules list for armhf. ] Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
When operating the system headless headless, the domain is never
powered on, leaving the clocks disabled. The shutdown function then
tries to disable the already disabled clocks, resulting in errors.
Therefore call meson_gx_pwrc_vpu_power_off() only if domain is
powered on.
This patch fixes the described issue on my system (Odorid-C2).
Fixes: 339cd0ea0822 "soc: amlogic: meson-gx-pwrc-vpu: fix power-off when powered by bootloader" Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
Add test cases verifying FIB onlink commands work as expected in
various conditions - IPv4, IPv6, main table, and VRF.
Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
drm_vblank_count() has an u32 type returning what is a 64-bit vblank count.
The effect of this is when drm_wait_vblank_ioctl() tries to widen the user
space requested vblank sequence using this clipped 32-bit count(when the
value is >= 2^32) as reference, the requested sequence remains a 32-bit
value and gets queued like that. However, the code that checks if the
requested sequence has passed compares this against the 64-bit vblank
count.
With drm_vblank_count() returning all bits of the vblank count, update
drm_crtc_accurate_vblank_count() so that drm_crtc_arm_vblank_event() queues
the correct sequence. Otherwise, this leads to prolonged waits for a vblank
sequence when the current count is >=2^32.
According to the figure 9.2(b) of the R-Car Series, 3rd Generation User’s
Manual: Hardware Rev. 0.80 the A2IRn and A2SCn power areas in R8A77970 have
the A3IR area as a parent, thus the SYSC driver has those parents wrong...
Brightness couldn't change when booting up in DC mode.
It was because "psr_enabled" flag was not set to true before
setting vsc packet revision, causing packet rev setup was skipped.
Now instead of checking the psr flag, it checks if the DPCD_REV >= 1.2
and set the vsc packet revision.
Signed-off-by: Tao <xtao@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
Currently, buffers holding individual queue statistics are allocated
when the device is opened. If an ibmvnic interface is hotplugged or
initialized but never opened, an attempt to get statistics with
ethtool will result in a kernel panic.
Since the driver allocates a constant number, the maximum supported
queues, of buffers, these can be allocated during device probe and
freed when the device is hot-unplugged or the module is removed.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
On the 8xx, the page size is set in the PMD entry and applies to
all pages of the page table pointed by the said PMD entry.
When an app has some regular pages allocated (e.g. see below) and tries
to mmap() a huge page at a hint address covered by the same PMD entry,
the kernel accepts the hint allthough the 8xx cannot handle different
page sizes in the same PMD entry.
In order to fix this, this patch uses the address space "slices"
implemented for BOOK3S/64 and enhanced to support PPC32 by the
preceding patch.
This patch modifies the context.id on the 8xx to be in the range
[1:16] instead of [0:15] in order to identify context.id == 0 as
not initialised contexts as done on BOOK3S
This patch activates CONFIG_PPC_MM_SLICES when CONFIG_HUGETLB_PAGE is
selected for the 8xx
Alltough we could in theory have as many slices as PMD entries, the
current slices implementation limits the number of low slices to 16.
This limitation is not preventing us to fix the initial issue allthough
it is suboptimal. It will be cured in a subsequent patch.
Fixes: 4b91428699477 ("powerpc/8xx: Implement support of hugepages") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
In preparation for the following patch which will fix an issue on
the 8xx by re-using the 'slices', this patch enhances the
'slices' implementation to support 32 bits CPUs.
On PPC32, the address space is limited to 4Gbytes, hence only the low
slices will be used.
The high slices use bitmaps. As bitmap functions are not prepared to
handle bitmaps of size 0, this patch ensures that bitmap functions
are called only when SLICE_NUM_HIGH is not nul.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
In preparation for the following patch which will enhance 'slices'
for supporting PPC32 in order to fix an issue on hugepages on 8xx,
this patch takes out of page*.h all bits related to 'slices' and put
them into newly created slice.h header files.
While common parts go into asm/slice.h, subarch specific
parts go into respective books3s/64/slice.c and nohash/64/slice.c
'slices'
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
bitmap_or() and bitmap_andnot() can work properly with dst identical
to src1 or src2. There is no need of an intermediate result bitmap
that is copied back to dst in a second step.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
The sdma wptr polling memory is not fast enough, then the sdma
wptr register will be random, and not equal to sdma rptr, which
will cause sdma engine hang when load driver, so clean up the sdma
wptr directly to fix this issue.
v2:add comment above the code and correct coding style
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Emily Deng <Emily.Deng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
Previously, we attempt to flush the whole cp pack in a single bio,
however, when suddenly powering off at this time, we could get into
an extreme scenario that cp pack 1 page and cp pack 2 page are updated
and latest, but payload or current summaries are still partially
outdated. (see reliable write in the UFS specification)
This patch submits the whole cp pack except cp pack 2 page at first,
and then writes the cp pack 2 page with an extra independent
bio with pre-io barrier.
projects / mirror_ubuntu-bionic-kernel.git / log