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10 years agoARM/KVM: save and restore generic timer registers
Andre Przywara [Fri, 13 Dec 2013 13:23:26 +0000 (14:23 +0100)]
ARM/KVM: save and restore generic timer registers

For migration to work we need to save (and later restore) the state of
each core's virtual generic timer.
Since this is per VCPU, we can use the [gs]et_one_reg ioctl and export
the three needed registers (control, counter, compare value).
Though they live in cp15 space, we don't use the existing list, since
they need special accessor functions and the arch timer is optional.

Acked-by: Marc Zynger <marc.zyngier@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
10 years agoarm/arm64: KVM: arch_timer: Initialize cntvoff at kvm_init
Christoffer Dall [Sat, 16 Nov 2013 18:51:25 +0000 (10:51 -0800)]
arm/arm64: KVM: arch_timer: Initialize cntvoff at kvm_init

Initialize the cntvoff at kvm_init_vm time, not before running the VCPUs
at the first time because that will overwrite any potentially restored
values from user space.

Cc: Andre Przywara <andre.przywara@linaro.org>
Acked-by: Marc Zynger <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
10 years agoKVM: MMU: handle invalid root_hpa at __direct_map
Marcelo Tosatti [Thu, 19 Dec 2013 17:28:51 +0000 (15:28 -0200)]
KVM: MMU: handle invalid root_hpa at __direct_map

It is possible for __direct_map to be called on invalid root_hpa
(-1), two examples:

1) try_async_pf -> can_do_async_pf
    -> vmx_interrupt_allowed -> nested_vmx_vmexit
2) vmx_handle_exit -> vmx_interrupt_allowed -> nested_vmx_vmexit

Then to load_vmcs12_host_state and kvm_mmu_reset_context.

Check for this possibility, let fault exception be regenerated.

BZ: https://bugzilla.redhat.com/show_bug.cgi?id=924916

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoKVM: VMX: Do not skip the instruction if handle_dr injects a fault
Jan Kiszka [Wed, 18 Dec 2013 18:16:24 +0000 (19:16 +0100)]
KVM: VMX: Do not skip the instruction if handle_dr injects a fault

If kvm_get_dr or kvm_set_dr reports that it raised a fault, we must not
advance the instruction pointer. Otherwise the exception will hit the
wrong instruction.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoKVM: nVMX: Support direct APIC access from L2
Jan Kiszka [Mon, 16 Dec 2013 11:55:46 +0000 (12:55 +0100)]
KVM: nVMX: Support direct APIC access from L2

It's a pathological case, but still a valid one: If L1 disables APIC
virtualization and also allows L2 to directly write to the APIC page, we
have to forcibly enable APIC virtualization while in L2 if the in-kernel
APIC is in use.

This allows to run the direct interrupt test case in the vmx unit test
without x2APIC.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoKVM: x86: Add comment on vcpu_enter_guest()'s return value
Takuya Yoshikawa [Fri, 13 Dec 2013 06:08:38 +0000 (15:08 +0900)]
KVM: x86: Add comment on vcpu_enter_guest()'s return value

Giving proper names to the 0 and 1 was once suggested.  But since 0 is
returned to the userspace, giving it another name can introduce extra
confusion.  This patch just explains the meanings instead.

Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoKVM: Use cond_resched() directly and remove useless kvm_resched()
Takuya Yoshikawa [Fri, 13 Dec 2013 06:07:21 +0000 (15:07 +0900)]
KVM: Use cond_resched() directly and remove useless kvm_resched()

Since the commit 15ad7146 ("KVM: Use the scheduler preemption notifiers
to make kvm preemptible"), the remaining stuff in this function is a
simple cond_resched() call with an extra need_resched() check which was
there to avoid dropping VCPUs unnecessarily.  Now it is meaningless.

Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoMerge tag 'kvm-s390-20131211' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms39...
Paolo Bonzini [Thu, 12 Dec 2013 10:41:33 +0000 (11:41 +0100)]
Merge tag 'kvm-s390-20131211' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next

Some further s390 patches for kvm-next.

Various improvements and bugfixes in the signal processor handling.
Document kvm support for diagnose (s390 hypercalls). And last but
not least, fix a bug in the s390 ioeventfd backend that was causing
us grief in scenarios with 4G+ memory.

10 years agoKVM: nVMX: Add support for activity state HLT
Jan Kiszka [Wed, 4 Dec 2013 07:58:54 +0000 (08:58 +0100)]
KVM: nVMX: Add support for activity state HLT

We can easily emulate the HLT activity state for L1: If it decides that
L2 shall be halted on entry, just invoke the normal emulation of halt
after switching to L2. We do not depend on specific host features to
provide this, so we can expose the capability unconditionally.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoKVM: VMX: shadow VM_(ENTRY|EXIT)_CONTROLS vmcs field
Gleb Natapov [Mon, 25 Nov 2013 13:37:13 +0000 (15:37 +0200)]
KVM: VMX: shadow VM_(ENTRY|EXIT)_CONTROLS vmcs field

VM_(ENTRY|EXIT)_CONTROLS vmcs fields are read/written on each guest
entry but most times it can be avoided since values do not changes.
Keep fields copy in memory to avoid unnecessary reads from vmcs.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agoMerge remote-tracking branch 'tip/x86/cpufeature' into kvm-next
Paolo Bonzini [Thu, 12 Dec 2013 09:46:15 +0000 (10:46 +0100)]
Merge remote-tracking branch 'tip/x86/cpufeature' into kvm-next

10 years agoKVM: s390: ioeventfd: ignore leftmost bits
Dominik Dingel [Mon, 9 Dec 2013 17:30:01 +0000 (18:30 +0100)]
KVM: s390: ioeventfd: ignore leftmost bits

The diagnose 500 subcode 3 contains the 32 bit subchannel id in bits 32-63
(counting from the left). As for other I/O instructions, bits 0-31 should be
ignored and thus not be passed to kvm_io_bus_write_cookie().

This fixes a bug where the guest passed non-zero bits 0-31 which the
host tried to interpret, leading to ioeventfd notification failures.

Cc: stable@vger.kernel.org
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: SIGP START has to report BUSY while stopping a CPU
Thomas Huth [Tue, 3 Dec 2013 11:54:55 +0000 (12:54 +0100)]
KVM: s390: SIGP START has to report BUSY while stopping a CPU

Just like the RESTART order, the START order also has to report BUSY
while a STOP request is pending, to avoid that the START might be
ignored due to a race condition between the STOP and the START order.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Reworked SIGP RESTART order
Thomas Huth [Wed, 27 Nov 2013 10:47:10 +0000 (11:47 +0100)]
KVM: s390: Reworked SIGP RESTART order

When SIGP RESTART detected an illegal CPU address, there is no need to
drop to userspace, we can return CC3 to the guest directly instead.
Also renamed __sigp_restart() to sigp_check_callable() (since this
is a better description of what the function is really doing) and
moved a string specific to RESTART to the calling place instead, so
that this function gets usable by other SIGP orders, too.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Add the SIGP order CONDITIONAL EMERGENCY SIGNAL
Thomas Huth [Thu, 21 Nov 2013 15:01:48 +0000 (16:01 +0100)]
KVM: s390: Add the SIGP order CONDITIONAL EMERGENCY SIGNAL

This patch adds the missing SIGP order "conditional emergency
signal" by calling the "emergency signal" SIGP handler if the
required conditions are met.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Use helper function to set CC in SIGP handler
Thomas Huth [Tue, 26 Nov 2013 11:27:16 +0000 (12:27 +0100)]
KVM: s390: Use helper function to set CC in SIGP handler

We've got a helper function for setting the condition code now,
so let's use it in the SIGP handler, too.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: diagnose call documentation
Cornelia Huck [Wed, 13 Nov 2013 10:15:02 +0000 (11:15 +0100)]
KVM: s390: diagnose call documentation

Add some further documentation on the DIAGNOSE calls we support.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agox86, xsave: Support eager-only xsave features, add MPX support
Qiaowei Ren [Thu, 5 Dec 2013 09:15:34 +0000 (17:15 +0800)]
x86, xsave: Support eager-only xsave features, add MPX support

Some features, like Intel MPX, work only if the kernel uses eagerfpu
model.  So we should force eagerfpu on unless the user has explicitly
disabled it.

Add definitions for Intel MPX and add it to the supported list.

[ hpa: renamed XSTATE_FLEXIBLE to XSTATE_LAZY and added comments ]

Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Link: http://lkml.kernel.org/r/9E0BE1322F2F2246BD820DA9FC397ADE014A6115@SHSMSX102.ccr.corp.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
10 years agox86, cpufeature: Define the Intel MPX feature flag
Qiaowei Ren [Sat, 7 Dec 2013 00:20:57 +0000 (08:20 +0800)]
x86, cpufeature: Define the Intel MPX feature flag

Define the Intel MPX (Memory Protection Extensions) CPU feature flag
in the cpufeature list.

Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Link: http://lkml.kernel.org/r/1386375658-2191-2-git-send-email-qiaowei.ren@intel.com
Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
10 years agoLinux 3.13-rc2
Linus Torvalds [Fri, 29 Nov 2013 20:57:14 +0000 (12:57 -0800)]
Linux 3.13-rc2

10 years agoMerge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas...
Linus Torvalds [Fri, 29 Nov 2013 17:57:13 +0000 (09:57 -0800)]
Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 fixes from Catalin Marinas:
 - Remove preempt_count modifications in the arm64 IRQ handling code
   since that's already dealt with in generic irq_enter/irq_exit
 - PTE_PROT_NONE bit moved higher up to avoid overlapping with the
   hardware bits (for PROT_NONE mappings which are pte_present)
 - Big-endian fixes for ptrace support
 - Asynchronous aborts unmasking while in the kernel
 - pgprot_writecombine() change to create Normal NonCacheable memory
   rather than Device GRE

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: Move PTE_PROT_NONE higher up
  arm64: Use Normal NonCacheable memory for writecombine
  arm64: debug: make aarch32 bkpt checking endian clean
  arm64: ptrace: fix compat registes get/set to be endian clean
  arm64: Unmask asynchronous aborts when in kernel mode
  arm64: dts: Reserve the memory used for secondary CPU release address
  arm64: let the core code deal with preempt_count

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 29 Nov 2013 17:56:15 +0000 (09:56 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:
 "One performance improvement and a few bug fixes.  Two of the fixes
  deal with the clock related problems we have seen on recent kernels"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/mm: handle asce-type exceptions as normal page fault
  s390,time: revert direct ktime path for s390 clockevent device
  s390/time,vdso: convert to the new update_vsyscall interface
  s390/uaccess: add missing page table walk range check
  s390/mm: optimize copy_page
  s390/dasd: validate request size before building CCW/TCW request
  s390/signal: always restore saved runtime instrumentation psw bit

10 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Fri, 29 Nov 2013 17:55:13 +0000 (09:55 -0800)]
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Some easy but needed fixes for i2c drivers since rc1"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: bcm2835: Linking platform nodes to adapter nodes
  i2c: omap: raw read and write endian fix
  i2c: i2c-bcm-kona: Fix module build
  i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C
  i2c: bcm-kona: remove duplicated include
  i2c: davinci: raw read and write endian fix

10 years agoMerge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Linus Torvalds [Fri, 29 Nov 2013 17:49:08 +0000 (09:49 -0800)]
Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

Pull workqueue fixes from Tejun Heo:
 "This contains one important fix.  The NUMA support added a while back
  broke ordering guarantees on ordered workqueues.  It was enforced by
  having single frontend interface with @max_active == 1 but the NUMA
  support puts multiple interfaces on unbound workqueues on NUMA
  machines thus breaking the ordered guarantee.  This is fixed by
  disabling NUMA support on ordered workqueues.

  The above and a couple other patches were sitting in for-3.12-fixes
  but I forgot to push that out, so they ended up waiting a bit too
  long.  My aplogies.

  Other fixes are minor"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: fix pool ID allocation leakage and remove BUILD_BUG_ON() in init_workqueues
  workqueue: fix comment typo for __queue_work()
  workqueue: fix ordered workqueues in NUMA setups
  workqueue: swap set_cpus_allowed_ptr() and PF_NO_SETAFFINITY

10 years agoMerge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Fri, 29 Nov 2013 17:48:25 +0000 (09:48 -0800)]
Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata

Pull libata fixes from Tejun Heo:
 "libata device removal path was removing parent device node before its
  child, which is mostly harmless but triggers warning after recent
  sysfs changes.  Rafael's patch fixes the order.

  Other than that, minor controller-specific fixes and device ID
  additions"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ATA: Fix port removal ordering
  ahci: add Marvell 9230 to the AHCI PCI device list
  ata: fix acpi_bus_get_device() return value check
  pata_arasan_cf: add missing clk_disable_unprepare() on error path
  ahci: add support for IBM Akebono platform device

10 years agoMerge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Fri, 29 Nov 2013 17:47:06 +0000 (09:47 -0800)]
Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:
 "Fixes for three issues.

   - cgroup destruction path could swamp system_wq possibly leading to
     deadlock.  This actually seems to happen in the wild with memcg
     because memcg destruction path adds nested dependency on system_wq.

     Resolved by isolating cgroup destruction work items on its
     dedicated workqueue.

   - Possible locking context deadlock through seqcount reported by
     lockdep

   - Memory leak under certain conditions"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: fix cgroup_subsys_state leak for seq_files
  cpuset: Fix memory allocator deadlock
  cgroup: use a dedicated workqueue for cgroup destruction

10 years agoMerge tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 29 Nov 2013 17:36:42 +0000 (09:36 -0800)]
Merge tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Quite a few HD-Audio fixes, a WUSB audio fix and a fix for FireWire
  audio.  The HD-audio part contains a couple of fixes for the generic
  parser, and these are the only intrusive fixes.  The rest are mostly
  device-specific fixes"

* tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add LFE chmap to ASUS ET2700
  ALSA: hda - Initialize missing bass speaker pin for ASUS AIO ET2700
  ALSA: hda - limit mic boost on Asus UX31[A,E]
  ALSA: hda - Check leaf nodes to find aamix amps
  ALSA: hda - Fix hp-mic mode without VREF bits
  ALSA: hda - Create Headhpone Mic Jack Mode when really needed
  ALSA: usb: use multiple packets per urb for Wireless USB inbound audio
  ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec
  ALSA: hda - Drop bus->avoid_link_reset flag
  ALSA: hda/realtek - Set pcbeep amp for ALC668
  ALSA: hda/realtek - Add support of ALC231 codec
  ALSA: firewire-lib: fix wrong value for FDF field as an empty packet

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Fri, 29 Nov 2013 17:27:19 +0000 (09:27 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs dentry reference count fix from Al Viro.

This fixes a possible inode_permission NULL pointer dereference (and
other problems) that were due to the root dentry count being decremented
too much.  In commit 48a066e72d97 ("RCU'd vfsmounts") the placement of
clearing the LOOKUP_RCU bit changed, and we then returned failure of
incrementing the lockref on the parent dentry with LOOKUP_RCU cleared.

But that meant we needed to go through the same cleanup routines that
the later failures did wrt LOOKUP_ROOT and nd->root.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix bogus path_put() of nd->root after some unlazy_walk() failures

10 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 29 Nov 2013 17:26:42 +0000 (09:26 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm qxl leak fix from Dave Airlie:
 "As usual 5 mins after I send a trivial pull fix I find a real bug!

  This fixes a memory leak and I'd like to get it into stable queue
  asap"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/qxl: fix memory leak in release list handling

10 years agoarm64: Move PTE_PROT_NONE higher up
Catalin Marinas [Wed, 27 Nov 2013 16:59:27 +0000 (16:59 +0000)]
arm64: Move PTE_PROT_NONE higher up

PTE_PROT_NONE means that a pte is present but does not have any
read/write attributes. However, setting the memory type like
pgprot_writecombine() is allowed and such bits overlap with
PTE_PROT_NONE. This causes mmap/munmap issues in drivers that change the
vma->vm_pg_prot on PROT_NONE mappings.

This patch reverts the PTE_FILE/PTE_PROT_NONE shift in commit
59911ca4325d (ARM64: mm: Move PTE_PROT_NONE bit) and moves PTE_PROT_NONE
together with the other software bits.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Cc: <stable@vger.kernel.org> # 3.11+
10 years agoarm64: Use Normal NonCacheable memory for writecombine
Catalin Marinas [Fri, 29 Nov 2013 10:56:14 +0000 (10:56 +0000)]
arm64: Use Normal NonCacheable memory for writecombine

This provides better performance compared to Device GRE and also allows
unaligned accesses. Such memory is intended to be used with standard RAM
(e.g. framebuffers) and not I/O.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agofix bogus path_put() of nd->root after some unlazy_walk() failures
Al Viro [Fri, 29 Nov 2013 06:48:32 +0000 (01:48 -0500)]
fix bogus path_put() of nd->root after some unlazy_walk() failures

Failure to grab reference to parent dentry should go through the
same cleanup as nd->seq mismatch.  As it is, we might end up with
caller thinking it needs to path_put() nd->root, with obvious
nasty results once we'd hit that bug enough times to drive the
refcount of root dentry all the way to zero...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
10 years agodrm/qxl: fix memory leak in release list handling
Dave Airlie [Thu, 28 Nov 2013 05:39:03 +0000 (05:39 +0000)]
drm/qxl: fix memory leak in release list handling

wow no idea how I got this far without seeing this,
leaking the entries in the list makes kmalloc-64 slab grow.

References: https://bugzilla.kernel.org/show_bug.cgi?id=65121
Cc: stable@vger.kernel.org
Reported-by: Matthew Stapleton <matthew4196@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agoarm64: debug: make aarch32 bkpt checking endian clean
Matthew Leach [Thu, 28 Nov 2013 12:07:23 +0000 (12:07 +0000)]
arm64: debug: make aarch32 bkpt checking endian clean

The current breakpoint instruction checking code for A32 is not endian
clean. Fix this with appropriate byte-swapping when retrieving
instructions.

Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoarm64: ptrace: fix compat registes get/set to be endian clean
Matthew Leach [Thu, 28 Nov 2013 12:07:22 +0000 (12:07 +0000)]
arm64: ptrace: fix compat registes get/set to be endian clean

On a BE system the wrong half of the X registers is retrieved/written
when attempting to get/set the value of aarch32 registers through
ptrace.

Ensure that types are the correct width so that the relevant
casting occurs.

Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoMerge tag 'gpio-v3.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Thu, 28 Nov 2013 17:57:46 +0000 (09:57 -0800)]
Merge tag 'gpio-v3.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Here us a bunch of patches for the v3.13 series.  Most important stuff
  is related to fixes and documentation for the new GPIO descriptor API.
  If the diffstat is scary you'll notice most of it is to
  Documentation/*:

   - A big slew of documentation for the gpiod transition that happened
     in the merge window, no semantic effect, but we should provide
     proper documentation with the new API.

   - Fix flags related to the new API.

   - Fix to the find_chip_by_name() lookup function related to the new
     API.

   - Fix of_find_gpio() when not using device tree.

   - Bug fix for the TB10x direction setting.

   - Error path fixes from Dan Carpenter.

   - Nasty IRQdomain bug relating to taking an unitialized spinlock.

   - Minor fixes here and there"

* tag 'gpio-v3.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: bcm281xx: Fix return value of bcm_kona_gpio_get()
  gpio: pl061: move irqdomain initialization
  gpio: ucb1400: Add MODULE_ALIAS
  gpiolib: fix of_find_gpio() when OF not defined
  gpio: fix memory leak in error path
  gpio: rcar: NULL dereference on error in probe()
  gpio: msm: make msm_gpio.summary_irq signed for error handling
  gpio: mvebu: make mvchip->irqbase signed for error handling
  gpiolib: use dedicated flags for GPIO properties
  gpiolib: fix find_chip_by_name()
  Documentation: gpiolib: document new interface
  gpio: tb10x: Set output value before setting direction to output

10 years agoMerge tag 'md/3.13-fixes' of git://neil.brown.name/md
Linus Torvalds [Thu, 28 Nov 2013 17:51:39 +0000 (09:51 -0800)]
Merge tag 'md/3.13-fixes' of git://neil.brown.name/md

Pull md fixes from Neil Brown:
 "Three bug fixes for md in 3.13-rc

  All recent regressions, one in 3.12 so marked for -stable"

* tag 'md/3.13-fixes' of git://neil.brown.name/md:
  md/raid5: fix newly-broken locking in get_active_stripe.
  md: test mddev->flags more safely in md_check_recovery.
  md/raid5: fix new memory-reference bug in alloc_thread_groups.

10 years agoMerge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Thu, 28 Nov 2013 17:50:25 +0000 (09:50 -0800)]
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "SMB3 "validate negotiate" is needed to prevent certain types of
  downgrade attacks.

  Also changes SMB2/SMB3 copy offload from using the BTRFS copy ioctl
  (BTRFS_IOC_CLONE) to a cifs specific ioctl (CIFS_IOC_COPYCHUNK_FILE)
  to address Christoph's comment that there are semantic differences
  between requesting copy offload in which copy-on-write is mandatory
  (as in the BTRFS ioctl) and optional in the SMB2/SMB3 case.  Also
  fixes SMB2/SMB3 copychunk for large files"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] Do not use btrfs refcopy ioctl for SMB2 copy offload
  Check SMB3 dialects against downgrade attacks
  Removed duplicated (and unneeded) goto
  CIFS: Fix SMB2/SMB3 Copy offload support (refcopy) for large files

10 years agokernel/extable: fix address-checks for core_kernel and init areas
Helge Deller [Thu, 28 Nov 2013 08:16:33 +0000 (09:16 +0100)]
kernel/extable: fix address-checks for core_kernel and init areas

The init_kernel_text() and core_kernel_text() functions should not
include the labels _einittext and _etext when checking if an address is
inside the .text or .init sections.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge tag 'kvm-s390-20131128' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms39...
Paolo Bonzini [Thu, 28 Nov 2013 14:30:16 +0000 (15:30 +0100)]
Merge tag 'kvm-s390-20131128' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next

Several fixes for kvm-next.

The diagnose decoding and the missing store status are more major (can
cause the host to execute different things than the guest wanted resp.
produce unusable dumps when something breaks). The other patches contain
more minor fixes and cleanups.

10 years agoALSA: hda - Add LFE chmap to ASUS ET2700
Takashi Iwai [Thu, 28 Nov 2013 14:24:34 +0000 (15:24 +0100)]
ALSA: hda - Add LFE chmap to ASUS ET2700

As the previous commit 1f0bbf03cb82 added the pin config for the bass
speaker, this patch adds the corresponding LFE-only channel map on
ASUS ET2700.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65961
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoALSA: hda - Initialize missing bass speaker pin for ASUS AIO ET2700
Takashi Iwai [Thu, 28 Nov 2013 14:21:21 +0000 (15:21 +0100)]
ALSA: hda - Initialize missing bass speaker pin for ASUS AIO ET2700

Add a fixup entry for the missing bass speaker pin 0x16 on ASUS ET2700
AiO desktop.  The channel map will be added in the next patch, so that
this can be backported easily to stable kernels.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65961
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoALSA: hda - limit mic boost on Asus UX31[A,E]
Oleksij Rempel [Wed, 27 Nov 2013 16:12:03 +0000 (17:12 +0100)]
ALSA: hda - limit mic boost on Asus UX31[A,E]

This both devices need limit for internal dmic.

[cosmetic change; renamed fixup name by tiwai]

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoALSA: hda - Check leaf nodes to find aamix amps
Takashi Iwai [Thu, 28 Nov 2013 10:05:28 +0000 (11:05 +0100)]
ALSA: hda - Check leaf nodes to find aamix amps

The current generic parser assumes blindly that the volume and mute
amps are found in the aamix node itself.  But on some codecs,
typically Analog Devices ones, the aamix amps are separately
implemented in each leaf node of the aamix node, and the current
driver can't establish the correct amp controls.  This is a regression
compared with the previous static quirks.

This patch extends the search for the amps to the leaf nodes for
allowing the aamix controls again on such codecs.
In this implementation, I didn't code to loop through the whole paths,
since usually one depth should suffice, and we can't search too
deeply, as it may result in the conflicting control assignments.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65641
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoKVM: s390: Removed kvm_s390_inject_sigp_stop()
Thomas Huth [Thu, 14 Nov 2013 10:08:20 +0000 (11:08 +0100)]
KVM: s390: Removed kvm_s390_inject_sigp_stop()

The function kvm_s390_inject_sigp_stop() as been unused since the
removal of the old mmu reload code and thus can be removed safely.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Add SIGP store-status-at-address order
Thomas Huth [Wed, 13 Nov 2013 19:48:51 +0000 (20:48 +0100)]
KVM: s390: Add SIGP store-status-at-address order

The STORE STATUS AT ADDRESS order of SIGP was still missing.
Now it is supported, using the common kvm_s390_store_status()
function.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: fix diagnose code extraction
Heiko Carstens [Mon, 11 Nov 2013 12:56:47 +0000 (13:56 +0100)]
KVM: s390: fix diagnose code extraction

The diagnose code to be used is the contents of the base register (if not
zero), plus the displacement. The current code ignores the base register
contents. So let's fix that...

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Fix clock comparator field for STORE STATUS
Thomas Huth [Wed, 13 Nov 2013 19:28:18 +0000 (20:28 +0100)]
KVM: s390: Fix clock comparator field for STORE STATUS

Only the most 7 significant bytes of the clock comparator must be
saved to the status area, and the byte at offset 304 has to be zero.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Always store status during SIGP STOP_AND_STORE_STATUS
Thomas Huth [Wed, 6 Nov 2013 14:46:33 +0000 (15:46 +0100)]
KVM: s390: Always store status during SIGP STOP_AND_STORE_STATUS

The SIGP order STOP_AND_STORE_STATUS is defined to stop a CPU and store
its status. However, we only stored the status if the CPU was still
running, so make sure that the status is now also stored if the CPU was
already stopped. This fixes the problem that the CPU information was
not stored correctly in kdump files, rendering them unreadable.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Do not set CC3 for EQBS and SQBS
Thomas Huth [Wed, 9 Oct 2013 14:49:03 +0000 (16:49 +0200)]
KVM: s390: Do not set CC3 for EQBS and SQBS

The EQBS and SQBS instructions do not set CC3 for invalid channels, but
should throw an operation exception instead when not available. Thus they
should not be handled by the handle_io_inst() wrapper but drop to userspace
instead (which will then inject the operation exception).

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Fix access to CR6 in TPI handler
Thomas Huth [Wed, 9 Oct 2013 12:15:54 +0000 (14:15 +0200)]
KVM: s390: Fix access to CR6 in TPI handler

The TPI handler currently uses vcpu->run->s.regs.crs[6] to get the current
value of CR6. I think this is wrong, because vcpu->run->s.regs.crs is
only updated when kvm_arch_vcpu_ioctl_run() drops back to userspace.
So let's change the TPI handler to use vcpu->arch.sie_block->gcr[6] instead.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Removed VIRTIODESCSPACE
Thomas Huth [Mon, 7 Oct 2013 15:50:22 +0000 (17:50 +0200)]
KVM: s390: Removed VIRTIODESCSPACE

VIRTIODESCSPACE is completely unused nowadays and thus can be removed
without any problems.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoKVM: s390: Removed SIE_INTERCEPT_UCONTROL
Thomas Huth [Thu, 19 Sep 2013 14:26:18 +0000 (16:26 +0200)]
KVM: s390: Removed SIE_INTERCEPT_UCONTROL

The SIE_INTERCEPT_UCONTROL can be removed by moving the related code
from kvm_arch_vcpu_ioctl_run() to vcpu_post_run().

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
10 years agoi2c: bcm2835: Linking platform nodes to adapter nodes
Florian Meier [Mon, 25 Nov 2013 08:01:50 +0000 (09:01 +0100)]
i2c: bcm2835: Linking platform nodes to adapter nodes

In order to find I2C devices in the device tree, the platform nodes
have to be known by the I2C core. This requires setting the
dev.of_node parameter of the adapter.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
10 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 28 Nov 2013 05:06:55 +0000 (21:06 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Just two minor fixes as people keep resending since they are so low
  hanging"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/nouveau/hwmon: fix compilation without CONFIG_HWMON
  drm/sysfs: fix OOM verification

10 years agoMerge tag 'tty-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Thu, 28 Nov 2013 05:06:01 +0000 (21:06 -0800)]
Merge tag 'tty-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are some tty/serial driver fixes for reported issues in 3.13-rc2.

  The n_gsm "fix" was reverted as it was found to not be correct.
  Hopefully this will be resolved in a future pull request, but as
  there's really only one user of this line setting, it's not a big
  deal..."

* tag 'tty-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "n_gsm: race between ld close and gsmtty open"
  n_tty: Protect minimum_to_wake reset for concurrent readers
  tty: Reset hupped state on open
  TTY: amiserial, add missing platform check
  TTY: pmac_zilog, check existence of ports in pmz_console_init()
  n_gsm: race between ld close and gsmtty open
  tty/serial/8250: fix typo in help text
  n_tty: Fix 4096-byte canonical reads
  n_tty: Fix echo overrun tail computation
  n_tty: Ensure reader restarts worker for next reader

10 years agoMerge tag 'staging-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Thu, 28 Nov 2013 05:05:31 +0000 (21:05 -0800)]
Merge tag 'staging-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging fixes from Greg KH:
 "Here are a number of staging, and IIO driver, fixes for 3.13-rc2 that
  resolve issues that have been reported for 3.13-rc1.  All of these
  have been in linux-next for a bit this week"

* tag 'staging-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (25 commits)
  Staging: tidspbridge: disable driver
  staging: zsmalloc: Ensure handle is never 0 on success
  staging/lustre/ptlrpc: fix ptlrpc_stop_pinger logic
  staging: r8188eu: Fix AP mode
  Staging: btmtk_usb: Add hdev parameter to hdev->send driver callback
  Staging: go7007: fix up some remaining go->dev issues
  staging: imx-drm: Fix modular build of DRM_IMX_IPUV3
  staging: ft1000: fix use of potentially uninitialized variable
  Revert "staging:media: Use dev_dbg() instead of pr_debug()"
  Staging: zram: Fix memory leak by refcount mismatch
  staging: vt6656: [BUG] Fix for TX USB resets from vendors driver.
  staging: nvec: potential NULL dereference on error path
  Staging: vt6655-6: potential NULL dereference in hostap_disable_hostapd()
  staging: comedi: s626: fix value written by s626_set_dac()
  Staging: comedi: pcl730: fix some bitwise vs logical AND bugs
  staging: comedi: fix potentially uninitialised variable
  iio:accel:kxsd9 fix missing mutex unlock
  iio: adc: ti_am335x_adc: avoid double free of buffer.
  staging:iio: Fix hmc5843 Kconfig dependencies
  iio: Fix tcs3472 Kconfig dependencies
  ...

10 years agoMerge tag 'driver-core-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 28 Nov 2013 05:04:37 +0000 (21:04 -0800)]
Merge tag 'driver-core-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are 3 patches for sysfs issues that have been reported.  Well, 1
  patch really, the first one is reverted as it's not really needed (the
  correct fix is coming in through the different driver subsystems
  instead)

  But that 1 sysfs fix is needed, so this is still a good thing to pull
  in now"

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'driver-core-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  Revert "sysfs: handle duplicate removal attempts in sysfs_remove_group()"
  sysfs: use a separate locking class for open files depending on mmap
  sysfs: handle duplicate removal attempts in sysfs_remove_group()

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Thu, 28 Nov 2013 04:41:54 +0000 (20:41 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid

Pull HID fixes from Jiri Kosina:
 - fix compat ioctl leak in uhid, by David Herrmann
 - fix scheduling in atomic context (causing actual lockups in real
   world) in hid-sony driver, by Sven Eckelmann
 - revert patch introducing VID/PID conflict, by Jiri Kosina
 - support from various new device IDs by Benjamin Tissoires and
   KaiChung Cheng

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: uhid: fix leak for 64/32 UHID_CREATE
  HID: kye: fix unresponsive keyboard
  HID: kye: Add report fixup for Genius Manticore Keyboard
  HID: multicouh: add PID VID to support 1 new Wistron optical touch device
  HID: appleir: force input to be set
  Revert "HID: wiimote: add LEGO-wiimote VID"
  HID: sony: Send FF commands in non-atomic context

10 years agoMerge tag 'pm+acpi-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Thu, 28 Nov 2013 04:40:35 +0000 (20:40 -0800)]
Merge tag 'pm+acpi-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:

 - Fix for a recent regression in the Tegra cpufreq driver causing
   excess error messages to be printed from Stephen Warren

 - ACPI-based device hotplug fix to prevent conflicting notify handlers
   from being installed for PCI host bridge objects.  From Toshi Kani

 - ACPICA update to upstream version 20131115.  This contains bug fixes
   mostly (loop termination fix for the get AML length function, fixes
   related to namespace node removal and debug output).  From Bob Moore,
   Tomasz Nowicki and Lv Zheng

 - Removal of incorrect inclusions of internal ACPICA header files by
   non-ACPICA code from Lv Zheng

 - Fixes for the ACPI sysfs interface exposing tables to user space from
   Daisuke Hatayama and Jeremy Compostella

 - Assorted ACPI and cpufreq cleanups from Sachin Kamat and Al Stone

 - cpupower tool fix and man page from Thomas Renninger

* tag 'pm+acpi-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: Clean up incorrect inclusions of ACPICA headers
  tools: cpupower: fix wrong err msg not supported vs not available
  tools: cpupower: Add cpupower-idle-set(1) manpage
  ACPI / sysfs: Fix incorrect ACPI tables walk in acpi_tables_sysfs_init()
  ACPI / sysfs: Set file size for each exposed ACPI table
  ACPICA: Update version to 20131115.
  ACPICA: Add support to delete all objects attached to the root namespace node.
  ACPICA: Delete all attached data objects during namespace node deletion.
  ACPICA: Resources: Fix loop termination for the get AML length function.
  ACPICA: Tests: Add CHECKSUM_ABORT protection for test utilities.
  ACPICA: Debug output: Do not emit function nesting level for kernel build.
  ACPI / sleep: clean up compiler warning about uninitialized field
  cpufreq: exynos: Remove unwanted EXPORT_SYMBOL
  cpufreq: tegra: don't error target() when suspended
  ACPI / hotplug: Fix conflicted PCI bridge notify handlers

10 years agodoc: fix generation of device-drivers
Nicolas Dichtel [Wed, 20 Nov 2013 08:50:28 +0000 (09:50 +0100)]
doc: fix generation of device-drivers

Since commit 7a6354e241d8 ("sched: Move wait.c into kernel/sched/"), the
path of this file has changed.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Andy Whitcroft <apw@canonical.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agodrm/nouveau/hwmon: fix compilation without CONFIG_HWMON
Ilia Mirkin [Wed, 27 Nov 2013 17:38:42 +0000 (12:38 -0500)]
drm/nouveau/hwmon: fix compilation without CONFIG_HWMON

Reported-by: Jim Davis <jim.epost@gmail.com>
Tested-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agolockref: include mutex.h rather than reinvent arch_mutex_cpu_relax
Will Deacon [Wed, 27 Nov 2013 13:52:53 +0000 (13:52 +0000)]
lockref: include mutex.h rather than reinvent arch_mutex_cpu_relax

arch_mutex_cpu_relax is already conditionally defined in mutex.h, so
simply include that header rather than replicate the code here.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agodrm/sysfs: fix OOM verification
David Herrmann [Tue, 26 Nov 2013 11:50:50 +0000 (12:50 +0100)]
drm/sysfs: fix OOM verification

Copy/Paste typo.. we need to test for ->kdev instead of ->dev.

Reported-by: Juha Leppänen <juha_efku@dnainternet.net>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agoremove obsolete references to powertweak
Dave Jones [Wed, 27 Nov 2013 20:15:57 +0000 (15:15 -0500)]
remove obsolete references to powertweak

This tool hasn't been maintained in over a decade, and is pretty much
useless these days.  Let's pretend it never happened.

Also remove a long-dead email address.

Signed-off-by: Dave Jones <davej@fedoraproject.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Thu, 28 Nov 2013 04:32:38 +0000 (20:32 -0800)]
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

Pull powerpc fixes from Ben Herrenschmidt:
 "The main thing that caused problem was that CONFIG_CPU_LITTLE_ENDIAN
  got turned on with allyesconfig and such, which is not a very good
  idea especially since it requires a newer toolchain than what most
  people have.

  So we turned it into a choice instead that defaults to big endian"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/windfarm: Fix XServe G5 fan control Makefile issue
  arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflow
  powerpc/signals: Improved mark VSX not saved with small contexts fix
  powerpc/kdump: Adding symbols in vmcoreinfo to facilitate dump filtering
  powerpc: allyesconfig should not select CONFIG_CPU_LITTLE_ENDIAN
  powerpc: Fix error when cross building TAGS & cscope
  powerpc/booke: Only check for hugetlb in flush if vma != NULL
  powerpc/85xx: typo in dts: "interupt" (four devices)
  powerpc/8xx: mfspr SPRN_TBRx in lieu of mftb/mftbu is not supported
  powerpc/corenet64: compile with CONFIG_E{5,6}500_CPU well

10 years agomd/raid5: fix newly-broken locking in get_active_stripe.
NeilBrown [Wed, 27 Nov 2013 23:55:27 +0000 (10:55 +1100)]
md/raid5: fix newly-broken locking in get_active_stripe.

commit 566c09c53455d7c4f1 raid5: relieve lock contention in get_active_stripe()

modified the locking in get_active_stripe() reducing the range
protected by the (highly contended) device_lock.
Unfortunately it reduced the range too much opening up some races.

One race can occur if get_priority_stripe runs between the
test on sh->count and device_lock being taken.
This will mean that sh->lru is not empty while get_active_stripe
thinks ->count is zero resulting in a 'BUG' firing.

Another race happens if __release_stripe is called immediately
after sh->count is tested and found to be non-zero.  If STRIPE_HANDLE
is not set, get_active_stripe should increment ->active_stripes
when it increments ->count from 0, but as it didn't think it was 0,
it doesn't.

Extending device_lock to cover the test on sh->count close these
races.

While we are here, fix the two BUG tests:
 -If count is zero, then lru really must not be empty, or we've
  lock the stripe_head somehow - no other tests are relevant.
 -STRIPE_ON_RELEASE_LIST is completely independent of ->lru so
  testing it is pointless.

Reported-and-tested-by: Brassow Jonathan <jbrassow@redhat.com>
Reviewed-by: Shaohua Li <shli@kernel.org>
Fixes: 566c09c53455d7c4f1
Signed-off-by: NeilBrown <neilb@suse.de>
10 years agomd: test mddev->flags more safely in md_check_recovery.
NeilBrown [Wed, 27 Nov 2013 23:34:18 +0000 (10:34 +1100)]
md: test mddev->flags more safely in md_check_recovery.

commit 7a0a5355cbc71efa md: Don't test all of mddev->flags at once.
made most tests on mddev->flags safer, but missed one.

When
commit 260fa034ef7a4ff8b7306 md: avoid deadlock when dirty buffers during md_stop.
added MD_STILL_CLOSED, this caused md_check_recovery to misbehave.
It can think there is something to do but find nothing.  This can
lead to the md thread spinning during array shutdown.

https://bugzilla.kernel.org/show_bug.cgi?id=65721

Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com>
Fixes: 260fa034ef7a4ff8b7306
Cc: stable@vger.kernel.org (3.12)
Signed-off-by: NeilBrown <neilb@suse.de>
10 years agomd/raid5: fix new memory-reference bug in alloc_thread_groups.
NeilBrown [Mon, 25 Nov 2013 00:12:43 +0000 (11:12 +1100)]
md/raid5: fix new memory-reference bug in alloc_thread_groups.

In alloc_thread_groups, worker_groups is a pointer to an array,
not an array of pointers.
So
   worker_groups[i]
is wrong.  It should be
   &(*worker_groups)[i]

Found-by: coverity
Fixes: 60aaf9338545
Reported-by: Ben Hutchings <bhutchings@solarflare.com>
Cc: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
10 years agocgroup: fix cgroup_subsys_state leak for seq_files
Tejun Heo [Wed, 27 Nov 2013 23:16:21 +0000 (18:16 -0500)]
cgroup: fix cgroup_subsys_state leak for seq_files

If a cgroup file implements either read_map() or read_seq_string(),
such file is served using seq_file by overriding file->f_op to
cgroup_seqfile_operations, which also overrides the release method to
single_release() from cgroup_file_release().

Because cgroup_file_open() didn't use to acquire any resources, this
used to be fine, but since f7d58818ba42 ("cgroup: pin
cgroup_subsys_state when opening a cgroupfs file"), cgroup_file_open()
pins the css (cgroup_subsys_state) which is put by
cgroup_file_release().  The patch forgot to update the release path
for seq_files and each open/release cycle leaks a css reference.

Fix it by updating cgroup_file_release() to also handle seq_files and
using it for seq_file release path too.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # v3.12
10 years agoATA: Fix port removal ordering
Rafael J. Wysocki [Mon, 25 Nov 2013 12:19:01 +0000 (13:19 +0100)]
ATA: Fix port removal ordering

After commit bcdde7e221a8 (sysfs: make __sysfs_remove_dir() recursive)
Mika Westerberg sees traces analogous to the one below in Thunderbolt
hot-remove testing:

 WARNING: CPU: 0 PID: 4 at fs/sysfs/group.c:214 sysfs_remove_group+0xc6/0xd0()
 sysfs group ffffffff81c6f1e0 not found for kobject 'host7'
 Modules linked in:
 CPU: 0 PID: 4 Comm: kworker/0:0 Not tainted 3.12.0+ #13
 Hardware name:                  /D33217CK, BIOS GKPPT10H.86A.0042.2013.0422.1439 04/22/2013
 Workqueue: kacpi_hotplug acpi_hotplug_work_fn
  0000000000000009 ffff8801002459b0 ffffffff817daab1 ffff8801002459f8
  ffff8801002459e8 ffffffff810436b8 0000000000000000 ffffffff81c6f1e0
  ffff88006d440358 ffff88006d440188 ffff88006e8b4c28 ffff880100245a48
 Call Trace:
  [<ffffffff817daab1>] dump_stack+0x45/0x56
  [<ffffffff810436b8>] warn_slowpath_common+0x78/0xa0
  [<ffffffff81043727>] warn_slowpath_fmt+0x47/0x50
  [<ffffffff811ad319>] ? sysfs_get_dirent_ns+0x49/0x70
  [<ffffffff811ae526>] sysfs_remove_group+0xc6/0xd0
  [<ffffffff81432f7e>] dpm_sysfs_remove+0x3e/0x50
  [<ffffffff8142a0d0>] device_del+0x40/0x1b0
  [<ffffffff8142a24d>] device_unregister+0xd/0x20
  [<ffffffff8144131a>] scsi_remove_host+0xba/0x110
  [<ffffffff8145f526>] ata_host_detach+0xc6/0x100
  [<ffffffff8145f578>] ata_pci_remove_one+0x18/0x20
  [<ffffffff812e8f48>] pci_device_remove+0x28/0x60
  [<ffffffff8142d854>] __device_release_driver+0x64/0xd0
  [<ffffffff8142d8de>] device_release_driver+0x1e/0x30
  [<ffffffff8142d257>] bus_remove_device+0xf7/0x140
  [<ffffffff8142a1b1>] device_del+0x121/0x1b0
  [<ffffffff812e43d4>] pci_stop_bus_device+0x94/0xa0
  [<ffffffff812e437b>] pci_stop_bus_device+0x3b/0xa0
  [<ffffffff812e437b>] pci_stop_bus_device+0x3b/0xa0
  [<ffffffff812e44dd>] pci_stop_and_remove_bus_device+0xd/0x20
  [<ffffffff812fc743>] trim_stale_devices+0x73/0xe0
  [<ffffffff812fc78b>] trim_stale_devices+0xbb/0xe0
  [<ffffffff812fc78b>] trim_stale_devices+0xbb/0xe0
  [<ffffffff812fcb6e>] acpiphp_check_bridge+0x7e/0xd0
  [<ffffffff812fd90d>] hotplug_event+0xcd/0x160
  [<ffffffff812fd9c5>] hotplug_event_work+0x25/0x60
  [<ffffffff81316749>] acpi_hotplug_work_fn+0x17/0x22
  [<ffffffff8105cf3a>] process_one_work+0x17a/0x430
  [<ffffffff8105db29>] worker_thread+0x119/0x390
  [<ffffffff8105da10>] ? manage_workers.isra.25+0x2a0/0x2a0
  [<ffffffff81063a5d>] kthread+0xcd/0xf0
  [<ffffffff81063990>] ? kthread_create_on_node+0x180/0x180
  [<ffffffff817eb33c>] ret_from_fork+0x7c/0xb0
  [<ffffffff81063990>] ? kthread_create_on_node+0x180/0x180

The source of this problem is that SCSI hosts are removed from
ATA ports after calling ata_tport_delete() which removes the
port's sysfs directory, among other things.  Now, after commit
bcdde7e221a8, the sysfs directory is removed along with all of
its subdirectories that include the SCSI host's sysfs directory
and its subdirectories at this point.  Consequently, when
device_del() is finally called for any child device of the SCSI
host and tries to remove its "power" group (which is already
gone then), it triggers the above warning.

To make the warnings go away, change the removal ordering in
ata_port_detach() so that the SCSI host is removed from the
port before ata_tport_delete() is called.

References: https://bugzilla.kernel.org/show_bug.cgi?id=65281
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
10 years agocpuset: Fix memory allocator deadlock
Peter Zijlstra [Tue, 26 Nov 2013 14:03:41 +0000 (15:03 +0100)]
cpuset: Fix memory allocator deadlock

Juri hit the below lockdep report:

[    4.303391] ======================================================
[    4.303392] [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]
[    4.303394] 3.12.0-dl-peterz+ #144 Not tainted
[    4.303395] ------------------------------------------------------
[    4.303397] kworker/u4:3/689 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
[    4.303399]  (&p->mems_allowed_seq){+.+...}, at: [<ffffffff8114e63c>] new_slab+0x6c/0x290
[    4.303417]
[    4.303417] and this task is already holding:
[    4.303418]  (&(&q->__queue_lock)->rlock){..-...}, at: [<ffffffff812d2dfb>] blk_execute_rq_nowait+0x5b/0x100
[    4.303431] which would create a new lock dependency:
[    4.303432]  (&(&q->__queue_lock)->rlock){..-...} -> (&p->mems_allowed_seq){+.+...}
[    4.303436]

[    4.303898] the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock:
[    4.303918] -> (&p->mems_allowed_seq){+.+...} ops: 2762 {
[    4.303922]    HARDIRQ-ON-W at:
[    4.303923]                     [<ffffffff8108ab9a>] __lock_acquire+0x65a/0x1ff0
[    4.303926]                     [<ffffffff8108cbe3>] lock_acquire+0x93/0x140
[    4.303929]                     [<ffffffff81063dd6>] kthreadd+0x86/0x180
[    4.303931]                     [<ffffffff816ded6c>] ret_from_fork+0x7c/0xb0
[    4.303933]    SOFTIRQ-ON-W at:
[    4.303933]                     [<ffffffff8108abcc>] __lock_acquire+0x68c/0x1ff0
[    4.303935]                     [<ffffffff8108cbe3>] lock_acquire+0x93/0x140
[    4.303940]                     [<ffffffff81063dd6>] kthreadd+0x86/0x180
[    4.303955]                     [<ffffffff816ded6c>] ret_from_fork+0x7c/0xb0
[    4.303959]    INITIAL USE at:
[    4.303960]                    [<ffffffff8108a884>] __lock_acquire+0x344/0x1ff0
[    4.303963]                    [<ffffffff8108cbe3>] lock_acquire+0x93/0x140
[    4.303966]                    [<ffffffff81063dd6>] kthreadd+0x86/0x180
[    4.303969]                    [<ffffffff816ded6c>] ret_from_fork+0x7c/0xb0
[    4.303972]  }

Which reports that we take mems_allowed_seq with interrupts enabled. A
little digging found that this can only be from
cpuset_change_task_nodemask().

This is an actual deadlock because an interrupt doing an allocation will
hit get_mems_allowed()->...->__read_seqcount_begin(), which will spin
forever waiting for the write side to complete.

Cc: John Stultz <john.stultz@linaro.org>
Cc: Mel Gorman <mgorman@suse.de>
Reported-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Tested-by: Juri Lelli <juri.lelli@gmail.com>
Acked-by: Li Zefan <lizefan@huawei.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
10 years agoi2c: omap: raw read and write endian fix
Victor Kamensky [Wed, 27 Nov 2013 13:48:08 +0000 (15:48 +0200)]
i2c: omap: raw read and write endian fix

All OMAP IP blocks expect LE data, but CPU may operate in BE mode.
Need to use endian neutral functions to read/write h/w registers.
I.e instead of __raw_read[lw] and __raw_write[lw] functions code
need to use read[lw]_relaxed and write[lw]_relaxed functions.
If the first simply reads/writes register, the second will byteswap
it if host operates in BE mode.

Changes are trivial sed like replacement of __raw_xxx functions
with xxx_relaxed variant.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
10 years agoRevert "sysfs: handle duplicate removal attempts in sysfs_remove_group()"
Greg Kroah-Hartman [Wed, 27 Nov 2013 17:44:55 +0000 (09:44 -0800)]
Revert "sysfs: handle duplicate removal attempts in sysfs_remove_group()"

This reverts commit 54d71145a4548330313ca664a4a009772fe8b7dd.

The root cause of these "inverted" sysfs removals have now been found,
so there is no need for this patch.  Keep this functionality around so
that this type of error doesn't show up in driver code again.

Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoStaging: tidspbridge: disable driver
Greg Kroah-Hartman [Wed, 27 Nov 2013 17:32:49 +0000 (09:32 -0800)]
Staging: tidspbridge: disable driver

There seems to be no active maintainer for the driver, and there is an
unfixed security bug, so disable the driver for now.

Hopefully someone steps up to be the maintainer, and works to get this
out of staging, otherwise it will be deleted soon.

Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Omar Ramirez Luna <omar.ramirez@copitl.com>
Cc: Omar Ramirez Luna <omar.ramirez@ti.com>
Cc: Kanigeri, Hari <h-kanigeri2@ti.com>
Cc: Ameya Palande <ameya.palande@nokia.com>
Cc: Guzman Lugo, Fernando <fernando.lugo@ti.com>
Cc: Hebbar, Shivananda <x0hebbar@ti.com>
Cc: Ramos Falcon, Ernesto <ernesto@ti.com>
Cc: Felipe Contreras <felipe.contreras@gmail.com>
Cc: Anna, Suman <s-anna@ti.com>
Cc: Gupta, Ramesh <grgupta@ti.com>
Cc: Gomez Castellanos, Ivan <ivan.gomez@ti.com>
Cc: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Cc: Armando Uribe De Leon <x0095078@ti.com>
Cc: Deepak Chitriki <deepak.chitriki@ti.com>
Cc: Menon, Nishanth <nm@ti.com>
Cc: Phil Carmody <ext-phil.2.carmody@nokia.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoKVM: Change maintainer email address
Gleb Natapov [Wed, 27 Nov 2013 14:35:22 +0000 (16:35 +0200)]
KVM: Change maintainer email address

My Red Hat email address will stop working soon. Updated if with other
address.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 years agogpio: bcm281xx: Fix return value of bcm_kona_gpio_get()
Markus Mayer [Thu, 21 Nov 2013 23:12:46 +0000 (15:12 -0800)]
gpio: bcm281xx: Fix return value of bcm_kona_gpio_get()

We need to return the corresponding bit for a particular GPIO. This bit
contains shift not mask.

Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoALSA: hda - Fix hp-mic mode without VREF bits
Takashi Iwai [Tue, 26 Nov 2013 07:44:26 +0000 (08:44 +0100)]
ALSA: hda - Fix hp-mic mode without VREF bits

When the hp mic pin has no VREF bits, the driver forgot to set PIN_IN
bit.  Spotted during debugging old MacBook Airs.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65681
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoALSA: hda - Create Headhpone Mic Jack Mode when really needed
Takashi Iwai [Tue, 26 Nov 2013 07:33:45 +0000 (08:33 +0100)]
ALSA: hda - Create Headhpone Mic Jack Mode when really needed

When a headphone jack is configurable as input, the generic parser
tries to make it retaskable as Headphone Mic.  The switching can be
done smoothly if Capture Source control exists (i.e. there is another
input source).  Or when user explicitly enables the creation of jack
mode controls, "Headhpone Mic Jack Mode" will be created accordingly.

However, if the headphone mic is the only input source, we have to
create "Headphone Mic Jack Mode" control because there is no capture
source selection.  Otherwise, the generic parser assumes that the
input is constantly enabled, thus the headphone is permanently set
as input.  This situation happens on the old MacBook Airs where no
input is supported properly, for example.

This patch fixes the problem: now "Headphone Mic Jack Mode" is created
when such an input selection isn't possible.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65681
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agogpio: pl061: move irqdomain initialization
Linus Walleij [Wed, 27 Nov 2013 07:47:02 +0000 (08:47 +0100)]
gpio: pl061: move irqdomain initialization

The PL061 driver had the irqdomain initialization in an unfortunate
place: when used with device tree (and thus passing the base IRQ
0) the driver would work, as this registers an irqdomain and waits
for mappings to be done dynamically as the devices request their
IRQs, whereas when booting using platform data the irqdomain core
would attempt to allocate IRQ descriptors dynamically (which works
fine) but also to associate the irq_domain_associate_many() on all
IRQs, which in turn will call the mapping function which at this
point will try to set the type of the IRQ and then tries to acquire
a non-initialized spinlock yielding a backtrace like this:

CPU: 0 PID: 1 Comm: swapper Not tainted 3.13.0-rc1+ #652
Backtrace:
[<c0016f0c>] (dump_backtrace) from [<c00172ac>] (show_stack+0x18/0x1c)
 r6:c798ace0 r5:00000000 r4:c78257e0 r3:00200140
[<c0017294>] (show_stack) from [<c0329ea0>] (dump_stack+0x20/0x28)
[<c0329e80>] (dump_stack) from [<c004fa80>] (__lock_acquire+0x1c0/0x1b80)
[<c004f8c0>] (__lock_acquire) from [<c0051970>] (lock_acquire+0x6c/0x80)
 r10:00000000 r9:c0455234 r8:00000060 r7:c047d798 r6:600000d3 r5:00000000
 r4:c782c000
[<c0051904>] (lock_acquire) from [<c032e484>] (_raw_spin_lock_irqsave+0x60/0x74)
 r6:c01a1100 r5:800000d3 r4:c798acd0
[<c032e424>] (_raw_spin_lock_irqsave) from [<c01a1100>] (pl061_irq_type+0x28/0x)
 r6:00000000 r5:00000000 r4:c798acd0
[<c01a10d8>] (pl061_irq_type) from [<c0059ef4>] (__irq_set_trigger+0x70/0x104)
 r6:00000000 r5:c01a10d8 r4:c046da1c r3:c01a10d8
[<c0059e84>] (__irq_set_trigger) from [<c005b348>] (irq_set_irq_type+0x40/0x60)
 r10:c043240c r8:00000060 r7:00000000 r6:c046da1c r5:00000060 r4:00000000
[<c005b308>] (irq_set_irq_type) from [<c01a1208>] (pl061_irq_map+0x40/0x54)
 r6:c79693c0 r5:c798acd0 r4:00000060
[<c01a11c8>] (pl061_irq_map) from [<c005d27c>] (irq_domain_associate+0xc0/0x190)
 r5:00000060 r4:c046da1c
[<c005d1bc>] (irq_domain_associate) from [<c005d604>] (irq_domain_associate_man)
 r8:00000008 r7:00000000 r6:c79693c0 r5:00000060 r4:00000000
[<c005d5d0>] (irq_domain_associate_many) from [<c005d864>] (irq_domain_add_simp)
 r8:c046578c r7:c035b72c r6:c79693c0 r5:00000060 r4:00000008 r3:00000008
[<c005d814>] (irq_domain_add_simple) from [<c01a1380>] (pl061_probe+0xc4/0x22c)
 r6:00000060 r5:c0464380 r4:c798acd0
[<c01a12bc>] (pl061_probe) from [<c01c0450>] (amba_probe+0x74/0xe0)
 r10:c043240c r9:c0455234 r8:00000000 r7:c047d7f8 r6:c047d744 r5:00000000
 r4:c0464380

This moves the irqdomain initialization to a point where the spinlock
and GPIO chip are both fully propulated, so the callbacks can be used
without crashes.

I had some problem reproducing the crash, as the devm_kzalloc():ed
zeroed memory would seemingly mask the spinlock as something OK,
but by poisoning the lock like this:

u32 *dum;
dum = (u32 *) &chip->lock;
*dum = 0xaaaaaaaaU;

I could reproduce, fix and test the patch.

Reported-by: Russell King <linux@arm.linux.org.uk>
Cc: Rob Herring <robherring2@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoALSA: usb: use multiple packets per urb for Wireless USB inbound audio
Thomas Pugliese [Tue, 26 Nov 2013 19:58:15 +0000 (13:58 -0600)]
ALSA: usb: use multiple packets per urb for Wireless USB inbound audio

For Wireless USB audio devices, use multiple isoc packets per URB for
inbound endpoints with a datainterval < 5.  This allows the WUSB host
controller to take advantage of bursting to service endpoints whose
logical polling interval is less than the 4ms minimum polling interval
limit in WUSB.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoHID: uhid: fix leak for 64/32 UHID_CREATE
David Herrmann [Tue, 26 Nov 2013 12:58:18 +0000 (13:58 +0100)]
HID: uhid: fix leak for 64/32 UHID_CREATE

UHID allows short writes so user-space can omit unused fields. We
automatically set them to 0 in the kernel. However, the 64/32 bit
compat-handler didn't do that in the UHID_CREATE fallback. This will
reveal random kernel heap data (of random size, even) to user-space.

Fixes: befde0226a59 ('HID: uhid: make creating devices work on 64/32 systems')
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
10 years agoALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec
Hui Wang [Wed, 27 Nov 2013 06:47:26 +0000 (14:47 +0800)]
ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec

Most Thinkpad Edge series laptops use conexant codec, so far although
the codecs have different minor Vendor Id and minor Subsystem Id,
they all belong to the cxt5066 family, this change can make the
mute/mic-mute LEDs support more generic among cxt_5066 family.

This design refers to the similar solution for the realtek codec
ALC269 family in the patch_realtek.c.

Cc: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Acked-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoMerge tag 'trace-fixes-v3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 27 Nov 2013 02:04:21 +0000 (18:04 -0800)]
Merge tag 'trace-fixes-v3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "This includes two fixes.

  1) is a bug fix that happens when root does the following:

     echo function_graph > current_tracer
     modprobe foo
     echo nop > current_tracer

   This causes the ftrace internal accounting to get screwed up and
   crashes ftrace, preventing the user from using the function tracer
   after that.

  2) if a TRACE_EVENT has a string field, and NULL is given for it.

   The internal trace event code does a strlen() and strcpy() on the
   source of field.  If it is NULL it causes the system to oops.

   This bug has been there since 2.6.31, but no TRACE_EVENT ever passed
   in a NULL to the string field, until now"

* tag 'trace-fixes-v3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Fix function graph with loading of modules
  tracing: Allow events to have NULL strings

10 years agoMerge branch 'for-linus-bugs' of git://git.kernel.org/pub/scm/linux/kernel/git/sage...
Linus Torvalds [Wed, 27 Nov 2013 02:02:46 +0000 (18:02 -0800)]
Merge branch 'for-linus-bugs' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

Pull ceph bug-fixes from Sage Weil:
 "These include a couple fixes to the new fscache code that went in
  during the last cycle (which will need to go stable@ shortly as well),
  a couple client-side directory fragmentation fixes, a fix for a race
  in the cap release queuing path, and a couple race fixes in the
  request abort and resend code.

  Obviously some of this could have gone into 3.12 final, but I
  preferred to overtest rather than send things in for a late -rc, and
  then my travel schedule intervened"

* 'for-linus-bugs' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: allocate non-zero page to fscache in readpage()
  ceph: wake up 'safe' waiters when unregistering request
  ceph: cleanup aborted requests when re-sending requests.
  ceph: handle race between cap reconnect and cap release
  ceph: set caps count after composing cap reconnect message
  ceph: queue cap release in __ceph_remove_cap()
  ceph: handle frag mismatch between readdir request and reply
  ceph: remove outdated frag information
  ceph: hung on ceph fscache invalidate in some cases

10 years agopowerpc/windfarm: Fix XServe G5 fan control Makefile issue
Benjamin Herrenschmidt [Wed, 27 Nov 2013 00:35:47 +0000 (11:35 +1100)]
powerpc/windfarm: Fix XServe G5 fan control Makefile issue

We are missing building windfarm_max6690_sensor.o when building
CONFIG_WINDFARM_RM31. Usually all the windfarm drivers are built
and thus this isn't a problem but some more "tailored" setups
(Gentoo ?) building only that driver are not working because
the require sensor module is missing.

Reported-by: Stanislav Ponomarev <devhexorg@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agoMerge branch 'pm-tools'
Rafael J. Wysocki [Wed, 27 Nov 2013 00:05:14 +0000 (01:05 +0100)]
Merge branch 'pm-tools'

* pm-tools:
  tools: cpupower: fix wrong err msg not supported vs not available
  tools: cpupower: Add cpupower-idle-set(1) manpage

10 years agoMerge branch 'pm-cpufreq'
Rafael J. Wysocki [Wed, 27 Nov 2013 00:03:43 +0000 (01:03 +0100)]
Merge branch 'pm-cpufreq'

* pm-cpufreq:
  cpufreq: exynos: Remove unwanted EXPORT_SYMBOL
  cpufreq: tegra: don't error target() when suspended

10 years agoMerge branch 'acpica'
Rafael J. Wysocki [Wed, 27 Nov 2013 00:03:27 +0000 (01:03 +0100)]
Merge branch 'acpica'

* acpica:
  ACPI: Clean up incorrect inclusions of ACPICA headers
  ACPICA: Update version to 20131115.
  ACPICA: Add support to delete all objects attached to the root namespace node.
  ACPICA: Delete all attached data objects during namespace node deletion.
  ACPICA: Resources: Fix loop termination for the get AML length function.
  ACPICA: Tests: Add CHECKSUM_ABORT protection for test utilities.
  ACPICA: Debug output: Do not emit function nesting level for kernel build.

10 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Tue, 26 Nov 2013 19:18:37 +0000 (11:18 -0800)]
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "Mostly bugfixes and a few small code removals.  Worth pointing out is:

   - A handful of more fixes to get DT enablement working properly on
     OMAP, finding new breakage of things that don't work quite right
     yet without the traditional board files.  I expect a bit more of
     this to come in this release as people test on their hardware.
   - Implementation of power_down_finish() on vexpress, to make kexec
     work and to stop the MCPM core to produce a warning (the warning
     was new to 3.13-rc1).
   - A handful of minor fixes for various platforms"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: bcm2835: add missing #xxx-cells to I2C nodes
  ARM: dts: Add max77686 RTC interrupt to cros5250-common
  ARM: vexpress/TC2: Implement MCPM power_down_finish()
  ARM: tegra: Provide dummy powergate implementation
  ARM: omap: fix warning with LPAE build
  ARM: OMAP2+: Remove legacy omap4_twl6030_hsmmc_init
  ARM: OMAP2+: Remove legacy mux code for display.c
  ARM: OMAP2+: Fix undefined reference to set_cntfreq
  gpio: twl4030: Fix passing of pdata in the device tree case
  gpio: twl4030: Fix regression for twl gpio output
  ARM: OMAP2+: More randconfig fixes for reconfigure_io_chain
  ARM: dts: imx6qdl: disable spdif "rxtx5" clock option
  ARM: dts: Fix omap2 specific dtsi files by adding the missing entries
  ARM: OMAP2+: Fix GPMC and simplify bootloader timings for 8250 and smc91x
  i2c: omap: Fix missing device tree flags for omap2

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Tue, 26 Nov 2013 19:16:54 +0000 (11:16 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull IMA fixes from James Morris:
 "These three patches fix regressions in the IMA code in your current
  tree.

  The first fixes a couple of bugs in template_desc_init_fields(), and
  the other two ensure that changes in this kernel don't break
  userspace"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  ima: make a copy of template_fmt in template_desc_init_fields()
  ima: do not send field length to userspace for digest of ima template
  ima: do not include field length in template digest calc for ima template

10 years agoMerge tag 'ntb-3.13' of git://github.com/jonmason/ntb
Linus Torvalds [Tue, 26 Nov 2013 19:15:12 +0000 (11:15 -0800)]
Merge tag 'ntb-3.13' of git://github.com/jonmason/ntb

Pull non-transparent bridge updates from Jon Mason:
 "NTB driver bug fixes to address a missed call to pci_enable_msix,
  NTB-RP Link Up issue, Xeon Doorbell errata workaround, ntb_transport
  link down race, and correct dmaengine_get/put usage.

  Also, clean-ups to remove duplicate defines and document a hardware
  errata.  Finally, some changes to improve performance"

* tag 'ntb-3.13' of git://github.com/jonmason/ntb:
  NTB: Disable interrupts and poll under high load
  NTB: Enable Snoop on Primary Side
  NTB: Document HW errata
  NTB: remove duplicate defines
  NTB: correct dmaengine_get/put usage
  NTB: Fix ntb_transport link down race
  ntb: Fix missed call to pci_enable_msix()
  NTB: Fix NTB-RP Link Up
  NTB: Xeon Doorbell errata workaround

10 years agoMerge branch 'fix/firewire' into for-linus
Takashi Iwai [Tue, 26 Nov 2013 17:37:40 +0000 (18:37 +0100)]
Merge branch 'fix/firewire' into for-linus

10 years agoftrace: Fix function graph with loading of modules
Steven Rostedt (Red Hat) [Tue, 26 Nov 2013 01:59:46 +0000 (20:59 -0500)]
ftrace: Fix function graph with loading of modules

Commit 8c4f3c3fa9681 "ftrace: Check module functions being traced on reload"
fixed module loading and unloading with respect to function tracing, but
it missed the function graph tracer. If you perform the following

 # cd /sys/kernel/debug/tracing
 # echo function_graph > current_tracer
 # modprobe nfsd
 # echo nop > current_tracer

You'll get the following oops message:

 ------------[ cut here ]------------
 WARNING: CPU: 2 PID: 2910 at /linux.git/kernel/trace/ftrace.c:1640 __ftrace_hash_rec_update.part.35+0x168/0x1b9()
 Modules linked in: nfsd exportfs nfs_acl lockd ipt_MASQUERADE sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables uinput snd_hda_codec_idt
 CPU: 2 PID: 2910 Comm: bash Not tainted 3.13.0-rc1-test #7
 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M., BIOS SDBLI944.86P 05/08/2007
  0000000000000668 ffff8800787efcf8 ffffffff814fe193 ffff88007d500000
  0000000000000000 ffff8800787efd38 ffffffff8103b80a 0000000000000668
  ffffffff810b2b9a ffffffff81a48370 0000000000000001 ffff880037aea000
 Call Trace:
  [<ffffffff814fe193>] dump_stack+0x4f/0x7c
  [<ffffffff8103b80a>] warn_slowpath_common+0x81/0x9b
  [<ffffffff810b2b9a>] ? __ftrace_hash_rec_update.part.35+0x168/0x1b9
  [<ffffffff8103b83e>] warn_slowpath_null+0x1a/0x1c
  [<ffffffff810b2b9a>] __ftrace_hash_rec_update.part.35+0x168/0x1b9
  [<ffffffff81502f89>] ? __mutex_lock_slowpath+0x364/0x364
  [<ffffffff810b2cc2>] ftrace_shutdown+0xd7/0x12b
  [<ffffffff810b47f0>] unregister_ftrace_graph+0x49/0x78
  [<ffffffff810c4b30>] graph_trace_reset+0xe/0x10
  [<ffffffff810bf393>] tracing_set_tracer+0xa7/0x26a
  [<ffffffff810bf5e1>] tracing_set_trace_write+0x8b/0xbd
  [<ffffffff810c501c>] ? ftrace_return_to_handler+0xb2/0xde
  [<ffffffff811240a8>] ? __sb_end_write+0x5e/0x5e
  [<ffffffff81122aed>] vfs_write+0xab/0xf6
  [<ffffffff8150a185>] ftrace_graph_caller+0x85/0x85
  [<ffffffff81122dbd>] SyS_write+0x59/0x82
  [<ffffffff8150a185>] ftrace_graph_caller+0x85/0x85
  [<ffffffff8150a2d2>] system_call_fastpath+0x16/0x1b
 ---[ end trace 940358030751eafb ]---

The above mentioned commit didn't go far enough. Well, it covered the
function tracer by adding checks in __register_ftrace_function(). The
problem is that the function graph tracer circumvents that (for a slight
efficiency gain when function graph trace is running with a function
tracer. The gain was not worth this).

The problem came with ftrace_startup() which should always be called after
__register_ftrace_function(), if you want this bug to be completely fixed.

Anyway, this solution moves __register_ftrace_function() inside of
ftrace_startup() and removes the need to call them both.

Reported-by: Dave Wysochanski <dwysocha@redhat.com>
Fixes: ed926f9b35cd ("ftrace: Use counters to enable functions to trace")
Cc: stable@vger.kernel.org # 3.0+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agotracing: Allow events to have NULL strings
Steven Rostedt (Red Hat) [Tue, 26 Nov 2013 14:22:54 +0000 (09:22 -0500)]
tracing: Allow events to have NULL strings

If an TRACE_EVENT() uses __assign_str() or __get_str on a NULL pointer
then the following oops will happen:

BUG: unable to handle kernel NULL pointer dereference at   (null)
IP: [<c127a17b>] strlen+0x10/0x1a
*pde = 00000000 ^M
Oops: 0000 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.13.0-rc1-test+ #2
Hardware name:                  /DG965MQ, BIOS MQ96510J.86A.0372.2006.0605.1717 06/05/2006^M
task: f5cde9f0 ti: f5e5e000 task.ti: f5e5e000
EIP: 0060:[<c127a17b>] EFLAGS: 00210046 CPU: 1
EIP is at strlen+0x10/0x1a
EAX: 00000000 EBX: c2472da8 ECX: ffffffff EDX: c2472da8
ESI: c1c5e5fc EDI: 00000000 EBP: f5e5fe84 ESP: f5e5fe80
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0: 8005003b CR2: 00000000 CR3: 01f32000 CR4: 000007d0
Stack:
 f5f18b90 f5e5feb8 c10687a8 0759004f 00000005 00000005 00000005 00200046
 00000002 00000000 c1082a93 f56c7e28 c2472da8 c1082a93 f5e5fee4 c106bc61^M
 00000000 c1082a93 00000000 00000000 00000001 00200046 00200082 00000000
Call Trace:
 [<c10687a8>] ftrace_raw_event_lock+0x39/0xc0
 [<c1082a93>] ? ktime_get+0x29/0x69
 [<c1082a93>] ? ktime_get+0x29/0x69
 [<c106bc61>] lock_release+0x57/0x1a5
 [<c1082a93>] ? ktime_get+0x29/0x69
 [<c10824dd>] read_seqcount_begin.constprop.7+0x4d/0x75
 [<c1082a93>] ? ktime_get+0x29/0x69^M
 [<c1082a93>] ktime_get+0x29/0x69
 [<c108a46a>] __tick_nohz_idle_enter+0x1e/0x426
 [<c10690e8>] ? lock_release_holdtime.part.19+0x48/0x4d
 [<c10bc184>] ? time_hardirqs_off+0xe/0x28
 [<c1068c82>] ? trace_hardirqs_off_caller+0x3f/0xaf
 [<c108a8cb>] tick_nohz_idle_enter+0x59/0x62
 [<c1079242>] cpu_startup_entry+0x64/0x192
 [<c102299c>] start_secondary+0x277/0x27c
Code: 90 89 c6 89 d0 88 c4 ac 38 e0 74 09 84 c0 75 f7 be 01 00 00 00 89 f0 48 5e 5d c3 55 89 e5 57 66 66 66 66 90 83 c9 ff 89 c7 31 c0 <f2> ae f7 d1 8d 41 ff 5f 5d c3 55 89 e5 57 66 66 66 66 90 31 ff
EIP: [<c127a17b>] strlen+0x10/0x1a SS:ESP 0068:f5e5fe80
CR2: 0000000000000000
---[ end trace 01bc47bf519ec1b2 ]---

New tracepoints have been added that have allowed for NULL pointers
being assigned to strings. To fix this, change the TRACE_EVENT() code
to check for NULL and if it is, it will assign "(null)" to it instead
(similar to what glibc printf does).

Reported-by: Shuah Khan <shuah.kh@samsung.com>
Reported-by: Jovi Zhangwei <jovi.zhangwei@gmail.com>
Link: http://lkml.kernel.org/r/CAGdX0WFeEuy+DtpsJzyzn0343qEEjLX97+o1VREFkUEhndC+5Q@mail.gmail.com
Link: http://lkml.kernel.org/r/528D6972.9010702@samsung.com
Fixes: 9cbf117662e2 ("tracing/events: provide string with undefined size support")
Cc: stable@vger.kernel.org # 2.6.31+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agoi2c: i2c-bcm-kona: Fix module build
Tim Kryger [Mon, 25 Nov 2013 20:01:18 +0000 (12:01 -0800)]
i2c: i2c-bcm-kona: Fix module build

Correct a typo that prevented the driver from being built as a module.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tim Kryger <tim.kryger@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
10 years agoi2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C
Martin Vogt [Sun, 24 Nov 2013 14:57:23 +0000 (15:57 +0100)]
i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C

The previous diolan adapter uses other out/in endpoints than
the current DLN-2-U2C in compatibility mode.
They changed from 0x2/0x84 to 0x3/0x83.
This patch gets the endpoints from the usb interface, instead
of hardcode them in the driver.

This was tested on a current DLN-2-U2C board.

Signed-off-by: Martin Vogt <mvogt1@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
10 years agoi2c: bcm-kona: remove duplicated include
Wei Yongjun [Thu, 21 Nov 2013 02:58:46 +0000 (10:58 +0800)]
i2c: bcm-kona: remove duplicated include

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
10 years agoALSA: hda - Drop bus->avoid_link_reset flag
Takashi Iwai [Tue, 26 Nov 2013 10:58:40 +0000 (11:58 +0100)]
ALSA: hda - Drop bus->avoid_link_reset flag

Use bus->power_keep_link_on instead.  The controller shouldn't go to
D3 when the link isn't reset, so essentially avoiding the link reset
means avoiding the runtime PM.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoALSA: hda/realtek - Set pcbeep amp for ALC668
Kailang Yang [Tue, 26 Nov 2013 07:41:40 +0000 (15:41 +0800)]
ALSA: hda/realtek - Set pcbeep amp for ALC668

Set the missing pcbeep default amp for ALC668.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>