GitHub/moto-9609/android_kernel_motorola_exynos9610.git
9 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 25 Sep 2015 17:51:40 +0000 (10:51 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "AMD fixes for bugs introduced in the 4.2 merge window, and a few PPC
  bug fixes too"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: disable halt_poll_ns as default for s390x
  KVM: x86: fix off-by-one in reserved bits check
  KVM: x86: use correct page table format to check nested page table reserved bits
  KVM: svm: do not call kvm_set_cr0 from init_vmcb
  KVM: x86: trap AMD MSRs for the TSeg base and mask
  KVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store()
  KVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exit
  KVM: PPC: Book3S HV: Fix handling of interrupted VCPUs
  kvm: svm: reset mmu on VCPU reset

9 years agoMerge tag 'powerpc-4.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 25 Sep 2015 17:11:26 +0000 (10:11 -0700)]
Merge tag 'powerpc-4.3-3' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 - Wire up sys_membarrier()
 - cxl: Fix lockdep warning while creating afu_err_buff from Vaibhav

* tag 'powerpc-4.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  cxl: Fix lockdep warning while creating afu_err_buff attribute
  powerpc: Wire up sys_membarrier()

9 years agoKVM: disable halt_poll_ns as default for s390x
David Hildenbrand [Fri, 18 Sep 2015 10:34:53 +0000 (12:34 +0200)]
KVM: disable halt_poll_ns as default for s390x

We observed some performance degradation on s390x with dynamic
halt polling. Until we can provide a proper fix, let's enable
halt_poll_ns as default only for supported architectures.

Architectures are now free to set their own halt_poll_ns
default value.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
9 years agoKVM: x86: fix off-by-one in reserved bits check
Paolo Bonzini [Tue, 22 Sep 2015 08:15:59 +0000 (10:15 +0200)]
KVM: x86: fix off-by-one in reserved bits check

29ecd6601904 ("KVM: x86: avoid uninitialized variable warning",
2015-09-06) introduced a not-so-subtle problem, which probably
escaped review because it was not part of the patch context.

Before the patch, leaf was always equal to iterator.level.  After,
it is equal to iterator.level - 1 in the call to is_shadow_zero_bits_set,
and when is_shadow_zero_bits_set does another "-1" the check on
reserved bits becomes incorrect.  Using "iterator.level" in the call
fixes this call trace:

WARNING: CPU: 2 PID: 17000 at arch/x86/kvm/mmu.c:3385 handle_mmio_page_fault.part.93+0x1a/0x20 [kvm]()
Modules linked in: tun sha256_ssse3 sha256_generic drbg binfmt_misc ipv6 vfat fat fuse dm_crypt dm_mod kvm_amd kvm crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd fam15h_power amd64_edac_mod k10temp edac_core amdkfd amd_iommu_v2 radeon acpi_cpufreq
[...]
Call Trace:
  dump_stack+0x4e/0x84
  warn_slowpath_common+0x95/0xe0
  warn_slowpath_null+0x1a/0x20
  handle_mmio_page_fault.part.93+0x1a/0x20 [kvm]
  tdp_page_fault+0x231/0x290 [kvm]
  ? emulator_pio_in_out+0x6e/0xf0 [kvm]
  kvm_mmu_page_fault+0x36/0x240 [kvm]
  ? svm_set_cr0+0x95/0xc0 [kvm_amd]
  pf_interception+0xde/0x1d0 [kvm_amd]
  handle_exit+0x181/0xa70 [kvm_amd]
  ? kvm_arch_vcpu_ioctl_run+0x68b/0x1730 [kvm]
  kvm_arch_vcpu_ioctl_run+0x6f6/0x1730 [kvm]
  ? kvm_arch_vcpu_ioctl_run+0x68b/0x1730 [kvm]
  ? preempt_count_sub+0x9b/0xf0
  ? mutex_lock_killable_nested+0x26f/0x490
  ? preempt_count_sub+0x9b/0xf0
  kvm_vcpu_ioctl+0x358/0x710 [kvm]
  ? __fget+0x5/0x210
  ? __fget+0x101/0x210
  do_vfs_ioctl+0x2f4/0x560
  ? __fget_light+0x29/0x90
  SyS_ioctl+0x4c/0x90
  entry_SYSCALL_64_fastpath+0x16/0x73
---[ end trace 37901c8686d84de6 ]---

Reported-by: Borislav Petkov <bp@alien8.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
9 years agoKVM: x86: use correct page table format to check nested page table reserved bits
Paolo Bonzini [Tue, 22 Sep 2015 21:02:14 +0000 (23:02 +0200)]
KVM: x86: use correct page table format to check nested page table reserved bits

Intel CPUID on AMD host or vice versa is a weird case, but it can
happen.  Handle it by checking the host CPU vendor instead of the
guest's in reset_tdp_shadow_zero_bits_mask.  For speed, the
check uses the fact that Intel EPT has an X (executable) bit while
AMD NPT has NX.

Reported-by: Borislav Petkov <bp@alien8.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
9 years agoKVM: svm: do not call kvm_set_cr0 from init_vmcb
Paolo Bonzini [Mon, 21 Sep 2015 05:46:55 +0000 (07:46 +0200)]
KVM: svm: do not call kvm_set_cr0 from init_vmcb

kvm_set_cr0 may want to call kvm_zap_gfn_range and thus access the
memslots array (SRCU protected).  Using a mini SRCU critical section
is ugly, and adding it to kvm_arch_vcpu_create doesn't work because
the VMX vcpu_create callback calls synchronize_srcu.

Fixes this lockdep splat:

===============================
[ INFO: suspicious RCU usage. ]
4.3.0-rc1+ #1 Not tainted
-------------------------------
include/linux/kvm_host.h:488 suspicious rcu_dereference_check() usage!

other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
1 lock held by qemu-system-i38/17000:
 #0:  (&(&kvm->mmu_lock)->rlock){+.+...}, at: kvm_zap_gfn_range+0x24/0x1a0 [kvm]

[...]
Call Trace:
 dump_stack+0x4e/0x84
 lockdep_rcu_suspicious+0xfd/0x130
 kvm_zap_gfn_range+0x188/0x1a0 [kvm]
 kvm_set_cr0+0xde/0x1e0 [kvm]
 init_vmcb+0x760/0xad0 [kvm_amd]
 svm_create_vcpu+0x197/0x250 [kvm_amd]
 kvm_arch_vcpu_create+0x47/0x70 [kvm]
 kvm_vm_ioctl+0x302/0x7e0 [kvm]
 ? __lock_is_held+0x51/0x70
 ? __fget+0x101/0x210
 do_vfs_ioctl+0x2f4/0x560
 ? __fget_light+0x29/0x90
 SyS_ioctl+0x4c/0x90
 entry_SYSCALL_64_fastpath+0x16/0x73

Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
9 years agoMerge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Linus Torvalds [Fri, 25 Sep 2015 03:14:26 +0000 (20:14 -0700)]
Merge branch 'next' of git://git./linux/kernel/git/rzhang/linux

Pull thermal management fixes from Zhang Rui:

 - Power allocator governor changes to allow binding on thermal zones
   with missing power estimates information.  From Javi Merino.

 - Add compile test flags on thermal drivers that allow it without
   producing compilation errors.  From Eduardo Valentin.

 - Fixes around memory allocation on cpu_cooling.  From Javi Merino.

 - Fix on db8500 cpufreq code to allow autoload.  From Luis de
   Bethencourt.

 - Maintainer entries for cpu cooling device

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  thermal: power_allocator: exit early if there are no cooling devices
  thermal: power_allocator: don't require tzp to be present for the thermal zone
  thermal: power_allocator: relax the requirement of two passive trip points
  thermal: power_allocator: relax the requirement of a sustainable_power in tzp
  thermal: Add a function to get the minimum power
  thermal: cpu_cooling: free power table on error or when unregistering
  thermal: cpu_cooling: don't call kcalloc() under rcu_read_lock
  thermal: db8500_cpufreq_cooling: Fix module autoload for OF platform driver
  thermal: cpu_cooling: Add MAINTAINERS entry
  thermal: ti-soc: Kconfig fix to avoid menu showing wrongly
  thermal: ti-soc: allow compile test
  thermal: qcom_spmi: allow compile test
  thermal: exynos: allow compile test
  thermal: armada: allow compile test
  thermal: dove: allow compile test
  thermal: kirkwood: allow compile test
  thermal: rockchip: allow compile test
  thermal: spear: allow compile test
  thermal: hisi: allow compile test
  thermal: Fix thermal_zone_of_sensor_register to match documentation

9 years agoMerge tag 'devicetree-fixes-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 25 Sep 2015 00:46:38 +0000 (17:46 -0700)]
Merge tag 'devicetree-fixes-for-4.3' of git://git./linux/kernel/git/robh/linux

Pull DeviceTree fixes from Rob Herring:
 - Silence bogus warning for of_irq_parse_pci
 - Fix typo in ARM idle-states binding doc and dts files
 - Various minor binding documentation updates

* tag 'devicetree-fixes-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  Documentation: arm: Fix typo in the idle-states bindings examples
  gpio: mention in DT binding doc that <name>-gpio is deprecated
  of_pci_irq: Silence bogus "of_irq_parse_pci() failed ..." messages.
  devicetree: bindings: Extend the bma180 bindings with bma250 info
  of: thermal: Mark cooling-*-level properties optional
  of: thermal: Fix inconsitency between cooling-*-state and cooling-*-level
  Docs: dt: add #msi-cells to GICv3 ITS binding
  of: add vendor prefix for Socionext Inc.

9 years agoDocumentation: arm: Fix typo in the idle-states bindings examples
Lorenzo Pieralisi [Thu, 24 Sep 2015 14:53:56 +0000 (15:53 +0100)]
Documentation: arm: Fix typo in the idle-states bindings examples

The idle-states bindings mandate that the entry-method string
in the idle-states node must be "psci" for ARM v8 64-bit systems,
but the examples in the bindings report a wrong entry-method string.
Owing to this typo, some dts in the kernel wrongly defined the
entry-method property, since they likely cut and pasted the example
definition without paying attention to the bindings definitions.

This patch fixes the typo in the DT idle states bindings examples and
respective dts in the kernel so that the bindings and related dts
files are made compliant.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Howard Chen <howard.chen@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Rob Herring <robh@kernel.org>
9 years agogpio: mention in DT binding doc that <name>-gpio is deprecated
Javier Martinez Canillas [Mon, 21 Sep 2015 12:57:25 +0000 (14:57 +0200)]
gpio: mention in DT binding doc that <name>-gpio is deprecated

The gpiolib supports parsing DT properties of the form <name>-gpio but it
was only added for compatibility with older DT bindings that got it wrong
and should not be used in newer bindings.

The commit that added support for this was:

dd34c37aa3e8 ("gpio: of: Allow -gpio suffix for property names")

but didn't update the documentation to explain this so it's been a source
of confusion. So let's make this clear in the GPIO DT binding doc.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Rob Herring <robh@kernel.org>
9 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 24 Sep 2015 22:37:06 +0000 (15:37 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Most of the GPU drivers people were at XDC last week, so I didn't get
  much to send, so I let it rollover until this week.

  Also Alex was away for 3 weeks so amdgpu/radeon got a bit more stuff
  than usual in one go.

  I've been trying to figure out some 4.2 issues with i915 still (that
  are fixed in 4.3, but bisecting ends up in a merge commit).  Hopefully
  next week I or i915 people can work that out"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (46 commits)
  drm: Allow also control clients to check the drm version
  drm/vmwgfx: Fix uninitialized return in vmw_kms_helper_dirty()
  drm/vmwgfx: Fix uninitialized return in vmw_cotable_unbind()
  drm/layerscape: fix handling fsl_dcu_drm_plane_index result
  drm/mgag200: Fix driver_load error handling
  drm/mgag200: Fix error handling paths in fbdev driver
  drm/qxl: only report first monitor as connected if we have no state
  drm/radeon: add quirk for MSI R7 370
  drm/amdgpu: Sprinkle drm_modeset_lock_all to appease locking checks
  drm/radeon: Sprinkle drm_modeset_lock_all to appease locking checks
  drm/amdgpu: sync ce and me with SWITCH_BUFFER(2)
  drm/amdgpu: integer overflow in amdgpu_mode_dumb_create()
  drm/amdgpu: info leak in amdgpu_gem_metadata_ioctl()
  drm/amdgpu: integer overflow in amdgpu_info_ioctl()
  drm/amdgpu: unwind properly in amdgpu_cs_parser_init()
  drm/amdgpu: Fix max_vblank_count value for current display engines
  drm/amdgpu: use kmemdup rather than duplicating its implementation
  drm/amdgpu: fix UVD suspend and resume for VI APU
  drm/amdgpu: fix the UVD suspend sequence order
  drm/amdgpu: make UVD handle checking more strict
  ...

9 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Thu, 24 Sep 2015 21:31:40 +0000 (14:31 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "15 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  ocfs2/dlm: fix deadlock when dispatch assert master
  membarrier: clean up selftest
  vmscan: fix sane_reclaim helper for legacy memcg
  lib/iommu-common.c: do not try to deref a null iommu->lazy_flush() pointer when n < pool->hint
  x86, efi, kasan: #undef memset/memcpy/memmove per arch
  mm: migrate: hugetlb: putback destination hugepage to active list
  mm, dax: VMA with vm_ops->pfn_mkwrite wants to be write-notified
  userfaultfd: register uapi generic syscall (aarch64)
  userfaultfd: selftest: don't error out if pthread_mutex_t isn't identical
  userfaultfd: selftest: return an error if BOUNCE_VERIFY fails
  userfaultfd: selftest: avoid my_bcmp false positives with powerpc
  userfaultfd: selftest: only warn if __NR_userfaultfd is undefined
  userfaultfd: selftest: headers fixup
  userfaultfd: selftests: vm: pick up sanitized kernel headers
  userfaultfd: revert "userfaultfd: waitqueue: add nr wake parameter to __wake_up_locked_key"

9 years agoMerge tag 'drm-intel-fixes-2015-09-24' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 24 Sep 2015 20:52:37 +0000 (06:52 +1000)]
Merge tag 'drm-intel-fixes-2015-09-24' of git://anongit.freedesktop.org/drm-intel into drm-fixes

a few drm/i915 fixes, including a fix to the recent regression
reported by Sedat Dilek

* tag 'drm-intel-fixes-2015-09-24' of git://anongit.freedesktop.org/drm-intel:
  drm/i915/bios: handle MIPI Sequence Block v3+ gracefully
  drm/i915: Add primary plane to mask if it's visible
  drm/i915: workaround bad DSL readout v3
  drm/i915: fix kernel-doc warnings in intel_audio.c

9 years agoMerge tag 'spi-fix-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Linus Torvalds [Thu, 24 Sep 2015 18:40:58 +0000 (11:40 -0700)]
Merge tag 'spi-fix-v4.3-rc2' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A disappointingly large collection of fixes for SPI issues, though
  almost all in drivers (and there mainly the newly added Mediatek
  driver) and the core fixes are documentation and error handling.

  The driver fixes are all of the usual 'important if you see them'
  variety"

* tag 'spi-fix-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: xtensa-xtfpga: fix register endianness
  spi: meson: Fix module autoload for OF platform driver
  spi: mediatek: fix wrong error return value on probe
  spi: fix kernel-doc warnings in spi.h
  spi: spidev: fix possible NULL dereference
  spi: atmel: remove warning when !CONFIG_PM_SLEEP
  spi: bcm2835: BUG: fix wrong use of PAGE_MASK
  spi: mediatek: fix spi cs polarity error
  spi: Fix documentation of spi_alloc_master()
  spi: spi-pxa2xx: Check status register to determine if SSSR_TINT is disabled
  spi: Mediatek: Document devicetree bindings update for spi bus
  spi: mediatek: fix spi clock usage error
  spi: mediatek: remove clk_disable_unprepare()

9 years agoMerge tag 'regulator-fix-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 24 Sep 2015 18:10:03 +0000 (11:10 -0700)]
Merge tag 'regulator-fix-v4.3-rc2' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "A collection of fixes that came in since I tagged the merge window
  pull request for v4.3:

   - Error handling fixes in the core

   - Fixes to a couple of TI drivers for device specific issues

   - Several fixes for module autoloading"

* tag 'regulator-fix-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: vexpress: Fix module autoload for OF platform driver
  regulator: gpio: Fix module autoload for OF platform driver
  regulator: anatop: Fix module autoload for OF platform driver
  regulator: core: Correct return value check in regulator_resolve_supply
  regulator: tps65218: Fix missing zero typo
  regulator: pbias: program pbias register offset in pbias driver
  regulator: core: fix possible NULL dereference

9 years agoMerge tag 'dm-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Thu, 24 Sep 2015 18:04:22 +0000 (11:04 -0700)]
Merge tag 'dm-4.3-fixes' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:
 "Two stable@ fixes:

   - DM thinp fix to properly advertise discard support as disabled for
     thin devices backed by a thin-pool with discard support disabled.

   - DM crypt fix to prevent the creation of bios that violate the
     underlying block device's max_segments limits.  This fixes a
     relatively long-standing NCQ SSD corruption issue reported against
     dm-crypt ever since the dm-crypt cpu parallelization patches were
     merged back in 4.0"

* tag 'dm-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm crypt: constrain crypt device's max_segment_size to PAGE_SIZE
  dm thin: disable discard support for thin devices if pool's is disabled

9 years agoMerge tag 'vmwgfx-fixes-4.3-150924' of git://people.freedesktop.org/~thomash/linux...
Dave Airlie [Thu, 24 Sep 2015 08:36:04 +0000 (18:36 +1000)]
Merge tag 'vmwgfx-fixes-4.3-150924' of git://people.freedesktop.org/~thomash/linux into drm-fixes

Pull request of 2015-09-24

Vmwgfx fixes for 4.3:
 - A couple of uninitialized variable fixes by Christian Engelmayer
 - A TTM fix for a bug that causes problems with the new vmwgfx device init
 - A vmwgfx refcounting fix
 - A vmwgfx iomem caching fix
 - A DRM change to allow also control clients to read the drm driver version.

* tag 'vmwgfx-fixes-4.3-150924' of git://people.freedesktop.org/~thomash/linux:
  drm: Allow also control clients to check the drm version
  drm/vmwgfx: Fix uninitialized return in vmw_kms_helper_dirty()
  drm/vmwgfx: Fix uninitialized return in vmw_cotable_unbind()
  drm/vmwgfx: Only build on X86
  drm/ttm: Fix memory space allocation v2
  drm/vmwgfx: Map the fifo as cached
  drm/vmwgfx: Fix up user_dmabuf refcounting

9 years agodrm: Allow also control clients to check the drm version
Thomas Hellstrom [Tue, 15 Sep 2015 08:11:42 +0000 (01:11 -0700)]
drm: Allow also control clients to check the drm version

This should be harmless.
Vmware will, due to old infrastructure reasons, be using a privileged
control client to supply GUI layout information rather than obtaining
it from the device. That control client will be needing access to DRM
version information.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Acked-by: David Herrmann <dh.herrmann@gmail.com>
9 years agodrm/vmwgfx: Fix uninitialized return in vmw_kms_helper_dirty()
Christian Engelmayer [Fri, 18 Sep 2015 22:32:24 +0000 (00:32 +0200)]
drm/vmwgfx: Fix uninitialized return in vmw_kms_helper_dirty()

Function vmw_kms_helper_dirty() uses the uninitialized variable ret as
return value. Make the result deterministic and directly return as the
variable is unused anyway. Detected by Coverity CID 1324255.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
9 years agodrm/vmwgfx: Fix uninitialized return in vmw_cotable_unbind()
Christian Engelmayer [Fri, 18 Sep 2015 22:31:10 +0000 (00:31 +0200)]
drm/vmwgfx: Fix uninitialized return in vmw_cotable_unbind()

Function vmw_cotable_unbind() uses the uninitialized variable ret as
return value. Make the result deterministic and directly return as
the variable is unused anyway. Detected by Coverity CID 1324256.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
9 years agoMerge branch 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Wed, 23 Sep 2015 22:13:34 +0000 (08:13 +1000)]
Merge branch 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

radeon and amdgpu fixes for 4.3.  It's a bit bigger than usual since
it's 3 weeks worth of fixes since I was on vacation, then at XDC.
- lots of stability fixes
- suspend and resume fixes
- GPU scheduler fixes
- Misc other fixes

* 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux: (31 commits)
  drm/radeon: add quirk for MSI R7 370
  drm/amdgpu: Sprinkle drm_modeset_lock_all to appease locking checks
  drm/radeon: Sprinkle drm_modeset_lock_all to appease locking checks
  drm/amdgpu: sync ce and me with SWITCH_BUFFER(2)
  drm/amdgpu: integer overflow in amdgpu_mode_dumb_create()
  drm/amdgpu: info leak in amdgpu_gem_metadata_ioctl()
  drm/amdgpu: integer overflow in amdgpu_info_ioctl()
  drm/amdgpu: unwind properly in amdgpu_cs_parser_init()
  drm/amdgpu: Fix max_vblank_count value for current display engines
  drm/amdgpu: use kmemdup rather than duplicating its implementation
  drm/amdgpu: fix UVD suspend and resume for VI APU
  drm/amdgpu: fix the UVD suspend sequence order
  drm/amdgpu: make UVD handle checking more strict
  drm/amdgpu: Disable UVD PG
  drm/amdgpu: more scheduler cleanups v2
  drm/amdgpu: cleanup fence queue init v2
  drm/amdgpu: rename fence->scheduler to sched v2
  drm/amdgpu: cleanup entity init
  drm/amdgpu: refine the scheduler job type conversion
  drm/amdgpu: refine the job naming for amdgpu_job and amdgpu_sched_job
  ...

9 years agodrm/layerscape: fix handling fsl_dcu_drm_plane_index result
Andrzej Hajda [Mon, 21 Sep 2015 13:33:47 +0000 (15:33 +0200)]
drm/layerscape: fix handling fsl_dcu_drm_plane_index result

The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodrm/mgag200: Fix driver_load error handling
Archit Taneja [Thu, 17 Sep 2015 11:00:55 +0000 (16:30 +0530)]
drm/mgag200: Fix driver_load error handling

mgag200_driver_load's error path just calls the drm driver's
driver_unload op. It isn't safe to call this because it doesn't handle
things well if driver_load fails somewhere mid way.

Replace the call to mgag200_driver_unload with a more finegrained
error handling path.

Link: http://lkml.kernel.org/r/55F6E68D.8070800@codeaurora.org
Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodrm/mgag200: Fix error handling paths in fbdev driver
Archit Taneja [Thu, 17 Sep 2015 11:00:54 +0000 (16:30 +0530)]
drm/mgag200: Fix error handling paths in fbdev driver

Set up error handling in mgag200_fbdev_init and mgag200fb_create such that
they release the things they allocate, rather than relying on someone
calling mga_fbdev_destroy.

Based on a patch by Sudip Mukherjee <sudipm.mukherjee@gmail.com>

Link: http://lkml.kernel.org/r/55F6E68D.8070800@codeaurora.org
Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodrm/qxl: only report first monitor as connected if we have no state
Dave Airlie [Mon, 14 Sep 2015 00:28:34 +0000 (10:28 +1000)]
drm/qxl: only report first monitor as connected if we have no state

If the server isn't new enough to give us state, report the first
monitor as always connected, otherwise believe the server side.

Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodrm/radeon: add quirk for MSI R7 370
Maxim Sheviakov [Wed, 23 Sep 2015 21:10:51 +0000 (17:10 -0400)]
drm/radeon: add quirk for MSI R7 370

Just adds the quirk for MSI R7 370 Armor 2X
Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=91294

Signed-off-by: Maxim Sheviakov <mrader3940@yandex.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: Sprinkle drm_modeset_lock_all to appease locking checks
Alex Deucher [Wed, 23 Sep 2015 18:32:06 +0000 (14:32 -0400)]
drm/amdgpu: Sprinkle drm_modeset_lock_all to appease locking checks

In

commit 7a3f3d6667f5f9ffd1517f6b21d64bbf5312042c
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 9 23:44:28 2015 +0200

    drm: Check locking in drm_for_each_connector

I added locking checks to drm_for_each_connector but failed that
through drm_helper_connector_dpms -> drm_helper_choose_encoder_dpms
it's used in a few more places in the amdgpu resume/suspend code.

Fix them up.

Note that we could use the connector iterator macros in there too, but
that's for the future.

Port of radeon commit:
drm/radeon: Sprinkle drm_modeset_lock_all to appease locking checks

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/radeon: Sprinkle drm_modeset_lock_all to appease locking checks
Daniel Vetter [Wed, 23 Sep 2015 18:26:45 +0000 (20:26 +0200)]
drm/radeon: Sprinkle drm_modeset_lock_all to appease locking checks

In

commit 7a3f3d6667f5f9ffd1517f6b21d64bbf5312042c
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 9 23:44:28 2015 +0200

    drm: Check locking in drm_for_each_connector

I added locking checks to drm_for_each_connector but failed that
through drm_helper_connector_dpms -> drm_helper_choose_encoder_dpms
it's used in a few more places in the radeon resume/suspend code.

Fix them up.

Note that we could use the connector iterator macros in there too, but
that's for the future.

Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: sync ce and me with SWITCH_BUFFER(2)
monk.liu [Wed, 23 Sep 2015 05:49:58 +0000 (13:49 +0800)]
drm/amdgpu: sync ce and me with SWITCH_BUFFER(2)

we used to adopt wait_reg_mem to let CE wait before DE finish page
updating, but from Tonga+, CE doesn't support wait_reg_mem package so
this logic no longer works.

so here is another approach to do same thing:
Insert two of SWITCH_BUFFER at both front and end of vm_flush can
guarantee that CE not go further to process IB_const before vm_flush
done.

Insert two of SWITCH_BUFFER also works on CI, so remove legency method
to sync CE and ME

v2:
Insert double SWITCH_BUFFER at front of vm flush as well.

Signed-off-by: monk.liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
9 years agodrm/amdgpu: integer overflow in amdgpu_mode_dumb_create()
Dan Carpenter [Wed, 23 Sep 2015 11:00:59 +0000 (14:00 +0300)]
drm/amdgpu: integer overflow in amdgpu_mode_dumb_create()

args->size is a u64.  arg->pitch and args->height are u32.  The
multiplication will overflow instead of using the high 32 bits as
intended.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: info leak in amdgpu_gem_metadata_ioctl()
Dan Carpenter [Wed, 23 Sep 2015 11:00:35 +0000 (14:00 +0300)]
drm/amdgpu: info leak in amdgpu_gem_metadata_ioctl()

There is no limit on args->data.data_size_bytes so we could read beyond
the end of the args->data.data[] array.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: integer overflow in amdgpu_info_ioctl()
Dan Carpenter [Wed, 23 Sep 2015 11:00:12 +0000 (14:00 +0300)]
drm/amdgpu: integer overflow in amdgpu_info_ioctl()

The "alloc_size" calculation can overflow leading to memory corruption.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: unwind properly in amdgpu_cs_parser_init()
Dan Carpenter [Wed, 23 Sep 2015 10:59:28 +0000 (13:59 +0300)]
drm/amdgpu: unwind properly in amdgpu_cs_parser_init()

The amdgpu_cs_parser_init() function doesn't clean up after itself but
instead the caller uses a free everything function amdgpu_cs_parser_fini()
on failure.  This style of error handling is often buggy.  In this
example, we call "drm_free_large(parser->chunks[i].kdata);" when it is
an unintialized pointer or when "parser->chunks" is NULL.

I fixed this bug by adding unwind code so that it frees everything that
it allocates.

I also mode some other very minor changes:
1) Renamed "r" to "ret".
2) Moved the chunk_array allocation to the start of the function.
3) Removed some initializers which are no longer needed.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: Fix max_vblank_count value for current display engines
Alex Deucher [Tue, 22 Sep 2015 14:06:45 +0000 (10:06 -0400)]
drm/amdgpu: Fix max_vblank_count value for current display engines

The value was much too low, which could cause the userspace visible
vblank counter to move backwards when the hardware counter wrapped
around.

Ported from radeon commit:
b0b9bb4dd51f396dcf843831905f729e74b0c8c0

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/amdgpu: use kmemdup rather than duplicating its implementation
Andrzej Hajda [Mon, 21 Sep 2015 21:34:39 +0000 (17:34 -0400)]
drm/amdgpu: use kmemdup rather than duplicating its implementation

The patch was generated using fixed coccinelle semantic patch
scripts/coccinelle/api/memdup.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2014320

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: fix UVD suspend and resume for VI APU
Leo Liu [Fri, 11 Sep 2015 21:09:57 +0000 (17:09 -0400)]
drm/amdgpu: fix UVD suspend and resume for VI APU

User space passed the same handle before suspend and after resume,
so we have remove the session and handle destroy, and keep the
firmware untouched.

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/amdgpu: fix the UVD suspend sequence order
Leo Liu [Fri, 11 Sep 2015 18:22:18 +0000 (14:22 -0400)]
drm/amdgpu: fix the UVD suspend sequence order

Fixes suspend issues with UVD.

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/amdgpu: make UVD handle checking more strict
Leo Liu [Tue, 15 Sep 2015 14:38:38 +0000 (10:38 -0400)]
drm/amdgpu: make UVD handle checking more strict

Invalid messages can crash the hw otherwise

Ported from radeon commit a1b403da70e038ca6c6c6fe434d1d873546873a3

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/amdgpu: Disable UVD PG
Leo Liu [Thu, 10 Sep 2015 17:41:38 +0000 (13:41 -0400)]
drm/amdgpu: Disable UVD PG

This causes problems with multiple suspend/resume cycles.

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/amdgpu: more scheduler cleanups v2
Christian König [Tue, 8 Sep 2015 18:22:31 +0000 (20:22 +0200)]
drm/amdgpu: more scheduler cleanups v2

Embed the scheduler into the ring structure instead of allocating it.
Use the ring name directly instead of the id.

v2: rebased, whitespace cleanup

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Chunming Zhou<david1.zhou@amd.com>
9 years agodrm/amdgpu: cleanup fence queue init v2
Christian König [Mon, 7 Sep 2015 16:43:02 +0000 (18:43 +0200)]
drm/amdgpu: cleanup fence queue init v2

Move the fence related stuff into amdgpu_fence.c

v2: rework commit message, cause this is actually not a bug

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou<david1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
9 years agodrm/amdgpu: rename fence->scheduler to sched v2
Christian König [Mon, 7 Sep 2015 16:16:49 +0000 (18:16 +0200)]
drm/amdgpu: rename fence->scheduler to sched v2

Just to be consistent with the other members.

v2: rename the ring member as well.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com> (v1)
Reviewed-by: Chunming Zhou<david1.zhou@amd.com>
9 years agodrm/amdgpu: cleanup entity init
Christian König [Mon, 7 Sep 2015 16:07:14 +0000 (18:07 +0200)]
drm/amdgpu: cleanup entity init

Reorder the fields and properly return the kfifo_alloc error code.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Chunming Zhou<david1.zhou@amd.com>
9 years agodrm/amdgpu: refine the scheduler job type conversion
Junwei Zhang [Wed, 9 Sep 2015 01:21:19 +0000 (09:21 +0800)]
drm/amdgpu: refine the scheduler job type conversion

Use container_of rather than casting.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: David Zhou <david1.zhou@amd.com>
Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
9 years agodrm/amdgpu: refine the job naming for amdgpu_job and amdgpu_sched_job
Junwei Zhang [Wed, 9 Sep 2015 01:05:55 +0000 (09:05 +0800)]
drm/amdgpu: refine the job naming for amdgpu_job and amdgpu_sched_job

Use consistent naming across functions.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: David Zhou <david1.zhou@amd.com>
Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
9 years agodrm/amdgpu: use only one reservation object for each VM v2
Christian König [Fri, 4 Sep 2015 08:47:56 +0000 (10:47 +0200)]
drm/amdgpu: use only one reservation object for each VM v2

Reduces the locking and fencing overhead.

v2: add comment why we need the duplicates list in the GEM op.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
9 years agodrm/amdgpu: validate duplicates in the CS as well
Christian König [Thu, 3 Sep 2015 14:40:39 +0000 (16:40 +0200)]
drm/amdgpu: validate duplicates in the CS as well

This allows for multiple BOs to have the same reservation object.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: export reservation_object from dmabuf to ttm (v2)
Christian König [Thu, 3 Sep 2015 15:34:59 +0000 (17:34 +0200)]
drm/amdgpu: export reservation_object from dmabuf to ttm (v2)

Adds an extra argument to amdgpu_bo_create, which is only used in amdgpu_prime.c.

Port of radeon commit 831b6966a60fe72d85ae3576056b4e4e0775b112.

v2: fix up kfd.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: fix overflow on 32bit systems
Christian König [Mon, 7 Sep 2015 10:32:09 +0000 (12:32 +0200)]
drm/amdgpu: fix overflow on 32bit systems

mem->start is a long, so this can overflow on 32bit systems.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/amdgpu: remove process_job callback from the scheduler
Christian König [Mon, 31 Aug 2015 15:28:28 +0000 (17:28 +0200)]
drm/amdgpu: remove process_job callback from the scheduler

Just free the resources immediately after submitting the job.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
9 years agodrm/amdgpu: move scheduler fence callback into fence v2
Christian König [Mon, 31 Aug 2015 15:02:52 +0000 (17:02 +0200)]
drm/amdgpu: move scheduler fence callback into fence v2

And call the processed callback directly after submitting the job.

v2: split adding error handling into separate patch.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
9 years agodrm/amdgpu: signal scheduler fence when hw submission fails v3
Christian König [Wed, 2 Sep 2015 10:03:06 +0000 (12:03 +0200)]
drm/amdgpu: signal scheduler fence when hw submission fails v3

Otherwise the resource blocked by it will never be reclaimed.

v2: add DRM_ERROR.
v3: fix typo in commit message

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Chunming Zhou<david1.zhou@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
9 years agodrm/amdgpu: add tracepoint for scheduler (v2)
Chunming Zhou [Mon, 7 Sep 2015 08:06:53 +0000 (16:06 +0800)]
drm/amdgpu: add tracepoint for scheduler (v2)

track sched job status like the length of job queue and hw job queue.

v2: fix build after rebase

Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
9 years agodrm/amdgpu: use write confirm for vm_flush()
Christian König [Sat, 5 Sep 2015 09:59:50 +0000 (11:59 +0200)]
drm/amdgpu: use write confirm for vm_flush()

Make sure the CP waits for the write to be confirmed before
invalidating.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: execution barrier after fence v2
Anatoli Antonovitch [Thu, 3 Sep 2015 15:13:31 +0000 (11:13 -0400)]
drm/amdgpu: execution barrier after fence v2

Insert wait for reg mem after EOP to fix potential issue with vm context switch

v2: move wait to vm_flush() use equal instead of greater than.

Signed-off-by: Anatoli Antonovitch <anatoli.antonovitch@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: add option to disable semaphores
Christian König [Sat, 5 Sep 2015 09:12:27 +0000 (11:12 +0200)]
drm/amdgpu: add option to disable semaphores

Provide module parameter to enable/disable them. Still
enabled by default.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/i915/bios: handle MIPI Sequence Block v3+ gracefully
Jani Nikula [Thu, 17 Sep 2015 13:42:07 +0000 (16:42 +0300)]
drm/i915/bios: handle MIPI Sequence Block v3+ gracefully

The VBT MIPI Sequence Block version 3 has forward incompatible changes:

First, the block size in the header has been specified reserved, and the
actual size is a separate 32-bit value within the block. The current
find_section() function to will only look at the size in the block
header, and, depending on what's in that now reserved size field,
continue looking for other sections in the wrong place.

Fix this by taking the new block size field into account. This will
ensure that the lookups for other sections will work properly, as long
as the new 32-bit size does not go beyond the opregion VBT mailbox size.

Second, the contents of the block have been completely
changed. Gracefully refuse parsing the yet unknown data version.

Cc: Deepak M <m.deepak@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Deepak M <m.deepak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agocxl: Fix lockdep warning while creating afu_err_buff attribute
Vaibhav Jain [Wed, 23 Sep 2015 03:07:59 +0000 (08:37 +0530)]
cxl: Fix lockdep warning while creating afu_err_buff attribute

Presently a lockdep warning is reported during creation of afu_err_buff
bin_attribute for the afu. This is caused due to the variable attr.key
not pointing to a static class key, hence the function lockdep_init_map
reports this warning:

 BUG: key <some-address> not in .data!

The patch fixes this issue by calling sysfs_attr_init on the
attr_eb.attr structure before populating it with the afu_err_buff file
details. This will populate the attr.key variable with a static class
key so that lockdep_init_map stops complaining about the lockdep key not
being static.

Reported-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
9 years agodrm/i915: Add primary plane to mask if it's visible
Maarten Lankhorst [Tue, 15 Sep 2015 12:28:54 +0000 (14:28 +0200)]
drm/i915: Add primary plane to mask if it's visible

This fixes the warnings like

"plane A assertion failure, should be disabled but not"

that on the initial modeset during boot. This can happen if
the primary plane is enabled by the firmware, but inheriting
it fails because the DMAR is active or for other reasons.

Most likely caused by

commit 36750f284b3a4f19b304fda1bb7d6e9e1275ea8d
Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date:   Mon Jun 1 12:49:54 2015 +0200

    drm/i915: update plane state during init

Reported-by: Andreas Reis <andreas.reis@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91429
Reported-and-tested-by: Emil Renner Berthing <kernel@esmil.dk>
Tested-by: Andreas Reis <andreas.reis@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agodrm/i915: workaround bad DSL readout v3
Jesse Barnes [Tue, 22 Sep 2015 19:15:54 +0000 (12:15 -0700)]
drm/i915: workaround bad DSL readout v3

On HSW at least (still testing other platforms, but should be harmless
elsewhere), the DSL reg reads back as 0 when read around vblank start
time.  This ends up confusing the atomic start/end checking code, since
it causes the update to appear as if it crossed a frame count boundary.
Avoid the problem by making sure we don't return scanline_offset from
the get_crtc_scanline function.  In moving the code there, I add to add
an additional delay since it could be called and have a legitimate 0
result for some time (depending on the pixel clock).

v2: move hsw dsl read hack to get_crtc_scanline (Ville)
v3: use break instead of goto (Ville)
    update comment with workaround details (Ville)

References: https://bugs.freedesktop.org/show_bug.cgi?id=91579
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agoocfs2/dlm: fix deadlock when dispatch assert master
Joseph Qi [Tue, 22 Sep 2015 21:59:20 +0000 (14:59 -0700)]
ocfs2/dlm: fix deadlock when dispatch assert master

The order of the following three spinlocks should be:
dlm_domain_lock < dlm_ctxt->spinlock < dlm_lock_resource->spinlock

But dlm_dispatch_assert_master() is called while holding
dlm_ctxt->spinlock and dlm_lock_resource->spinlock, and then it calls
dlm_grab() which will take dlm_domain_lock.

Once another thread (for example, dlm_query_join_handler) has already
taken dlm_domain_lock, and tries to take dlm_ctxt->spinlock deadlock
happens.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: "Junxiao Bi" <junxiao.bi@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomembarrier: clean up selftest
Mathieu Desnoyers [Tue, 22 Sep 2015 21:59:20 +0000 (14:59 -0700)]
membarrier: clean up selftest

We don't need to specify an explicit rule in the Makefile, the implicit
one will do the same.  The "__EXPORTED_HEADERS__" define is not needed,
because we build the test against the installed kernel headers, not the
in-tree kernel headers.  Re-use "$(TEST_PROGS)" in the clean target
rather than spelling the executable name twice.  Include <unistd.h>
rather than the rather specific <asm-generic/unistd.h>.  Include
<syscall.h> rather than <sys/syscall.h>.  In both cases, the former
header is located in a standard location and includes the latter.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Pranith Kumar <bobby.prani@gmail.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agovmscan: fix sane_reclaim helper for legacy memcg
Vladimir Davydov [Tue, 22 Sep 2015 21:59:20 +0000 (14:59 -0700)]
vmscan: fix sane_reclaim helper for legacy memcg

The sane_reclaim() helper is supposed to return false for memcg reclaim
if the legacy hierarchy is used, because the latter lacks dirty
throttling mechanism, and so it did before it was accidentally broken by
commit 33398cf2f360c ("memcg: export struct mem_cgroup").  Fix it.

Fixes: 33398cf2f360c ("memcg: export struct mem_cgroup")
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agolib/iommu-common.c: do not try to deref a null iommu->lazy_flush() pointer when n...
Sowmini Varadhan [Tue, 22 Sep 2015 21:59:20 +0000 (14:59 -0700)]
lib/iommu-common.c: do not try to deref a null iommu->lazy_flush() pointer when n < pool->hint

The check for invoking iommu->lazy_flush() from iommu_tbl_range_alloc()
has to be refactored so that we only call ->lazy_flush() if it is
non-null.

I had a sparc kernel that was crashing when I was trying to process some
very large perf.data files- the crash happens when the scsi driver calls
into dma_4v_map_sg and thus the iommu_tbl_range_alloc().

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agox86, efi, kasan: #undef memset/memcpy/memmove per arch
Andrey Ryabinin [Tue, 22 Sep 2015 21:59:17 +0000 (14:59 -0700)]
x86, efi, kasan: #undef memset/memcpy/memmove per arch

In not-instrumented code KASAN replaces instrumented memset/memcpy/memmove
with not-instrumented analogues __memset/__memcpy/__memove.

However, on x86 the EFI stub is not linked with the kernel.  It uses
not-instrumented mem*() functions from arch/x86/boot/compressed/string.c

So we don't replace them with __mem*() variants in EFI stub.

On ARM64 the EFI stub is linked with the kernel, so we should replace
mem*() functions with __mem*(), because the EFI stub runs before KASAN
sets up early shadow.

So let's move these #undef mem* into arch's asm/efi.h which is also
included by the EFI stub.

Also, this will fix the warning in 32-bit build reported by kbuild test
robot:

efi-stub-helper.c:599:2: warning: implicit declaration of function 'memcpy'

[akpm@linux-foundation.org: use 80 cols in comment]
Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Reported-by: Fengguang Wu <fengguang.wu@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: migrate: hugetlb: putback destination hugepage to active list
Naoya Horiguchi [Tue, 22 Sep 2015 21:59:14 +0000 (14:59 -0700)]
mm: migrate: hugetlb: putback destination hugepage to active list

Since commit bcc54222309c ("mm: hugetlb: introduce page_huge_active")
each hugetlb page maintains its active flag to avoid a race condition
betwe= en multiple calls of isolate_huge_page(), but current kernel
doesn't set the f= lag on a hugepage allocated by migration because the
proper putback routine isn= 't called.  This means that users could
still encounter the race referred to by bcc54222309c in this special
case, so this patch fixes it.

Fixes: bcc54222309c ("mm: hugetlb: introduce page_huge_active")
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org> [4.1.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm, dax: VMA with vm_ops->pfn_mkwrite wants to be write-notified
Kirill A. Shutemov [Tue, 22 Sep 2015 21:59:12 +0000 (14:59 -0700)]
mm, dax: VMA with vm_ops->pfn_mkwrite wants to be write-notified

For VM_PFNMAP and VM_MIXEDMAP we use vm_ops->pfn_mkwrite instead of
vm_ops->page_mkwrite to notify abort write access.  This means we want
vma->vm_page_prot to be write-protected if the VMA provides this vm_ops.

A theoretical scenario that will cause these missed events is:

  On writable mapping with vm_ops->pfn_mkwrite, but without
  vm_ops->page_mkwrite: read fault followed by write access to the pfn.
  Writable pte will be set up on read fault and write fault will not be
  generated.

I found it examining Dave's complaint on generic/080:

http://lkml.kernel.org/g/20150831233803.GO3902@dastard

Although I don't think it's the reason.

It shouldn't be a problem for ext2/ext4 as they provide both pfn_mkwrite
and page_mkwrite.

[akpm@linux-foundation.org: add local vm_ops to avoid 80-cols mess]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Yigal Korman <yigal@plexistor.com>
Acked-by: Boaz Harrosh <boaz@plexistor.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: register uapi generic syscall (aarch64)
Dr. David Alan Gilbert [Tue, 22 Sep 2015 21:59:09 +0000 (14:59 -0700)]
userfaultfd: register uapi generic syscall (aarch64)

Add the userfaultfd syscalls to uapi asm-generic, it was tested with
postcopy live migration on aarch64 with both 4k and 64k pagesize
kernels.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: selftest: don't error out if pthread_mutex_t isn't identical
Andrea Arcangeli [Tue, 22 Sep 2015 21:59:06 +0000 (14:59 -0700)]
userfaultfd: selftest: don't error out if pthread_mutex_t isn't identical

On ppc big endian this check fails, the mutex doesn't necessarily need
to be identical for all pages after pthread_mutex_lock/unlock cycles.
The count verification (outside of the pthread_mutex_t structure)
suffices and that is retained.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: selftest: return an error if BOUNCE_VERIFY fails
Andrea Arcangeli [Tue, 22 Sep 2015 21:59:03 +0000 (14:59 -0700)]
userfaultfd: selftest: return an error if BOUNCE_VERIFY fails

This will report the error in the exit code, in addition of the fprintf.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: selftest: avoid my_bcmp false positives with powerpc
Andrea Arcangeli [Tue, 22 Sep 2015 21:59:00 +0000 (14:59 -0700)]
userfaultfd: selftest: avoid my_bcmp false positives with powerpc

Keep a non-zero placeholder after the count, for the my_bcmp comparison
of the page against the zeropage.  The lockless increment between 255 to
256 against a lockless my_bcmp could otherwise return false positives on
ppc32le.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: selftest: only warn if __NR_userfaultfd is undefined
Michael Ellerman [Tue, 22 Sep 2015 21:58:58 +0000 (14:58 -0700)]
userfaultfd: selftest: only warn if __NR_userfaultfd is undefined

If __NR_userfaultfd is not yet defined by the arch, warn but still build
and run the userfaultfd selftest successfully.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: selftest: headers fixup
Andrea Arcangeli [Tue, 22 Sep 2015 21:58:55 +0000 (14:58 -0700)]
userfaultfd: selftest: headers fixup

Depend on "make headers_install" to create proper headers to include and
provide syscall numbers.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: selftests: vm: pick up sanitized kernel headers
Thierry Reding [Tue, 22 Sep 2015 21:58:52 +0000 (14:58 -0700)]
userfaultfd: selftests: vm: pick up sanitized kernel headers

Add the usr/include subdirectory of the top-level tree to the include
path, and make sure to include headers without relative paths to make
sure the sanitized headers get picked up.  Otherwise the compiler will
not be able to find the linux/compiler.h header included by the non-
sanitized include/uapi/linux/userfaultfd.h.

While at it, make sure to only hardcode the syscall numbers on x86 and
PowerPC if they haven't been properly picked up from the headers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agouserfaultfd: revert "userfaultfd: waitqueue: add nr wake parameter to __wake_up_locke...
Andrea Arcangeli [Tue, 22 Sep 2015 21:58:49 +0000 (14:58 -0700)]
userfaultfd: revert "userfaultfd: waitqueue: add nr wake parameter to __wake_up_locked_key"

This reverts commit 51360155eccb907ff8635bd10fc7de876408c2e0 and adapts
fs/userfaultfd.c to use the old version of that function.

It didn't look robust to call __wake_up_common with "nr == 1" when we
absolutely require wakeall semantics, but we've full control of what we
insert in the two waitqueue heads of the blocked userfaults.  No
exclusive waitqueue risks to be inserted into those two waitqueue heads
so we can as well stick to "nr == 1" of the old code and we can rely
purely on the fact no waitqueue inserted in one of the two waitqueue
heads we must enforce as wakeall, has wait->flags WQ_FLAG_EXCLUSIVE set.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoMerge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus...
Paolo Bonzini [Tue, 22 Sep 2015 20:01:46 +0000 (22:01 +0200)]
Merge branch 'kvm-ppc-fixes' of git://git./linux/kernel/git/paulus/powerpc into kvm-master

9 years agoMerge remote-tracking branches 'spi/fix/spidev' and 'spi/fix/xtfpga' into spi-linus
Mark Brown [Tue, 22 Sep 2015 16:48:41 +0000 (09:48 -0700)]
Merge remote-tracking branches 'spi/fix/spidev' and 'spi/fix/xtfpga' into spi-linus

9 years agoMerge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bcm2835', 'spi/fix/doc'...
Mark Brown [Tue, 22 Sep 2015 16:48:34 +0000 (09:48 -0700)]
Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bcm2835', 'spi/fix/doc', 'spi/fix/mediatek', 'spi/fix/meson', 'spi/fix/mtk' and 'spi/fix/pxa2xx' into spi-linus

9 years agospi: xtensa-xtfpga: fix register endianness
Max Filippov [Tue, 22 Sep 2015 11:32:03 +0000 (14:32 +0300)]
spi: xtensa-xtfpga: fix register endianness

XTFPGA SPI controller has native endian registers.
Fix register acessors so that they work in big-endian configurations.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
9 years agoMerge branch 'for-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Tue, 22 Sep 2015 01:26:54 +0000 (18:26 -0700)]
Merge branch 'for-4.3-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:
 "The threadgroup locking changes which went in during 4.2 devel cycle
  added write locking of a percpu_rwsem in cgroup task migration path;
  unfortunately, that involved expedited rcu syncing which turned out to
  be too slow and heavy for certain workloads.  The patchset which is
  dependent on this one didn't get committed during that devel cycle, so
  these two patches can be reverted safely.

  Oleg reworked percpu_rwsem for 4.4 so that the writer path is a lot
  lighter.  The reported issue goes away with Oleg's reworked
  percpu_rwsem and I'll reapply these patches on the for-4.4 branch so
  that they can land together with Oleg's changes"

* 'for-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  Revert "sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"
  Revert "cgroup: simplify threadgroup locking"

9 years agoMerge remote-tracking branches 'regulator/fix/anatop', 'regulator/fix/gpio', 'regulat...
Mark Brown [Mon, 21 Sep 2015 21:16:09 +0000 (14:16 -0700)]
Merge remote-tracking branches 'regulator/fix/anatop', 'regulator/fix/gpio', 'regulator/fix/pbias', 'regulator/fix/tpx65218' and 'regulator/fix/vexpress' into regulator-linus

9 years agoMerge remote-tracking branch 'regulator/fix/core' into regulator-linus
Mark Brown [Mon, 21 Sep 2015 21:15:58 +0000 (14:15 -0700)]
Merge remote-tracking branch 'regulator/fix/core' into regulator-linus

9 years agoMerge tag 'renesas-sh-drivers-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 21 Sep 2015 19:02:27 +0000 (12:02 -0700)]
Merge tag 'renesas-sh-drivers-for-v4.3' of git://git./linux/kernel/git/horms/renesas

Pull SH drivers updates from Simon Horman:
 "I am sending this change after v4.3-rc1 has been released as it
  depends on SoC changes which are present in that rc release.

  Summary:

   - disable PM runtime for multi-platform ARM with genpd

   - disable legacy default PM Domain on emev2"

* tag 'renesas-sh-drivers-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  drivers: sh: Disable PM runtime for multi-platform ARM with genpd
  drivers: sh: Disable legacy default PM Domain on emev2

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Mon, 21 Sep 2015 16:53:30 +0000 (09:53 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "A couple of system call updates.  The two new system calls userfaultfd
  and membarrier have been added, as well as the 17 direct calls for the
  multiplexed socket system calls.

  In addition the system call compat wrappers have been flagged as
  notrace functions and a few wrappers could be removed.

  And bug fixes for the vector register handling, cpu_mf, suspend/resume,
  compat signals, SMT cputime accounting and the zfcp dumper"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: wire up separate socketcalls system calls
  s390/compat: remove superfluous compat wrappers
  s390/compat: do not trace compat wrapper functions
  s390/s390x: allocate sys_membarrier system call number
  s390/configs//zfcpdump_defconfig: Remove CONFIG_MEMSTICK
  s390: wire up userfaultfd system call
  s390/vtime: correct scaled cputime for SMT
  s390/cpum_cf: Corrected return code for unauthorized counter sets
  s390/compat: correct uc_sigmask of the compat signal frame
  s390: fix floating point register corruption
  s390/hibernate: fix save and restore of vector registers

9 years agopowerpc: Wire up sys_membarrier()
Michael Ellerman [Wed, 16 Sep 2015 11:21:50 +0000 (21:21 +1000)]
powerpc: Wire up sys_membarrier()

The selftest passes on 64-bit LE & BE, and 32-bit.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
9 years agodrm/i915: fix kernel-doc warnings in intel_audio.c
Geliang Tang [Tue, 15 Sep 2015 13:04:36 +0000 (06:04 -0700)]
drm/i915: fix kernel-doc warnings in intel_audio.c

Fix the following 'make htmldocs' warnings:

  .//drivers/gpu/drm/i915/intel_audio.c:439: warning: No description found for parameter 'intel_encoder'
  .//drivers/gpu/drm/i915/intel_audio.c:439: warning: Excess function parameter 'encoder' description in 'intel_audio_codec_disable'
  .//drivers/gpu/drm/i915/intel_audio.c:439: warning: No description found for parameter 'intel_encoder'
  .//drivers/gpu/drm/i915/intel_audio.c:439: warning: Excess function parameter 'encoder' description in 'intel_audio_codec_disable'

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agoKVM: x86: trap AMD MSRs for the TSeg base and mask
Paolo Bonzini [Fri, 18 Sep 2015 15:33:04 +0000 (17:33 +0200)]
KVM: x86: trap AMD MSRs for the TSeg base and mask

These have roughly the same purpose as the SMRR, which we do not need
to implement in KVM.  However, Linux accesses MSR_K8_TSEG_ADDR at
boot, which causes problems when running a Xen dom0 under KVM.
Just return 0, meaning that processor protection of SMRAM is not
in effect.

Reported-by: M A Young <m.a.young@durham.ac.uk>
Cc: stable@vger.kernel.org
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
9 years agosecurity: fix typo in security_task_prctl
Jann Horn [Fri, 18 Sep 2015 21:41:23 +0000 (23:41 +0200)]
security: fix typo in security_task_prctl

Signed-off-by: Jann Horn <jann@thejh.net>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoKVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store()
Thomas Huth [Fri, 18 Sep 2015 06:57:28 +0000 (08:57 +0200)]
KVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store()

Access to the kvm->buses (like with the kvm_io_bus_read() and -write()
functions) has to be protected via the kvm->srcu lock.
The kvmppc_h_logical_ci_load() and -store() functions are missing
this lock so far, so let's add it there, too.
This fixes the problem that the kernel reports "suspicious RCU usage"
when lock debugging is enabled.

Cc: stable@vger.kernel.org # v4.1+
Fixes: 99342cf8044420eebdf9297ca03a14cb6a7085a1
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
9 years agoKVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exit
Gautham R. Shenoy [Thu, 21 May 2015 08:27:04 +0000 (13:57 +0530)]
KVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exit

In guest_exit_cont we call kvmhv_commence_exit which expects the trap
number as the argument. However r3 doesn't contain the trap number at
this point and as a result we would be calling the function with a
spurious trap number.

Fix this by copying r12 into r3 before calling kvmhv_commence_exit as
r12 contains the trap number.

Cc: stable@vger.kernel.org # v4.1+
Fixes: eddb60fb1443
Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
9 years agoKVM: PPC: Book3S HV: Fix handling of interrupted VCPUs
Paul Mackerras [Fri, 18 Sep 2015 03:13:44 +0000 (13:13 +1000)]
KVM: PPC: Book3S HV: Fix handling of interrupted VCPUs

This fixes a bug which results in stale vcore pointers being left in
the per-cpu preempted vcore lists when a VM is destroyed.  The result
of the stale vcore pointers is usually either a crash or a lockup
inside collect_piggybacks() when another VM is run.  A typical
lockup message looks like:

[  472.161074] NMI watchdog: BUG: soft lockup - CPU#24 stuck for 22s! [qemu-system-ppc:7039]
[  472.161204] Modules linked in: kvm_hv kvm_pr kvm xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw ses enclosure shpchp rtc_opal i2c_opal powernv_rng binfmt_misc dm_service_time scsi_dh_alua radeon i2c_algo_bit drm_kms_helper ttm drm tg3 ptp pps_core cxgb3 ipr i2c_core mdio dm_multipath [last unloaded: kvm_hv]
[  472.162111] CPU: 24 PID: 7039 Comm: qemu-system-ppc Not tainted 4.2.0-kvm+ #49
[  472.162187] task: c000001e38512750 ti: c000001e41bfc000 task.ti: c000001e41bfc000
[  472.162262] NIP: c00000000096b094 LR: c00000000096b08c CTR: c000000000111130
[  472.162337] REGS: c000001e41bff520 TRAP: 0901   Not tainted  (4.2.0-kvm+)
[  472.162399] MSR: 9000000100009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 24848844  XER: 00000000
[  472.162588] CFAR: c00000000096b0ac SOFTE: 1
GPR00: c000000000111170 c000001e41bff7a0 c00000000127df00 0000000000000001
GPR04: 0000000000000003 0000000000000001 0000000000000000 0000000000874821
GPR08: c000001e41bff8e0 0000000000000001 0000000000000000 d00000000efde740
GPR12: c000000000111130 c00000000fdae400
[  472.163053] NIP [c00000000096b094] _raw_spin_lock_irqsave+0xa4/0x130
[  472.163117] LR [c00000000096b08c] _raw_spin_lock_irqsave+0x9c/0x130
[  472.163179] Call Trace:
[  472.163206] [c000001e41bff7a0] [c000001e41bff7f0] 0xc000001e41bff7f0 (unreliable)
[  472.163295] [c000001e41bff7e0] [c000000000111170] __wake_up+0x40/0x90
[  472.163375] [c000001e41bff830] [d00000000efd6fc0] kvmppc_run_core+0x1240/0x1950 [kvm_hv]
[  472.163465] [c000001e41bffa30] [d00000000efd8510] kvmppc_vcpu_run_hv+0x5a0/0xd90 [kvm_hv]
[  472.163559] [c000001e41bffb70] [d00000000e9318a4] kvmppc_vcpu_run+0x44/0x60 [kvm]
[  472.163653] [c000001e41bffba0] [d00000000e92e674] kvm_arch_vcpu_ioctl_run+0x64/0x170 [kvm]
[  472.163745] [c000001e41bffbe0] [d00000000e9263a8] kvm_vcpu_ioctl+0x538/0x7b0 [kvm]
[  472.163834] [c000001e41bffd40] [c0000000002d0f50] do_vfs_ioctl+0x480/0x7c0
[  472.163910] [c000001e41bffde0] [c0000000002d1364] SyS_ioctl+0xd4/0xf0
[  472.163986] [c000001e41bffe30] [c000000000009260] system_call+0x38/0xd0
[  472.164060] Instruction dump:
[  472.164098] ebc1fff0 ebe1fff8 7c0803a6 4e800020 60000000 60000000 60420000 8bad02e2
[  472.164224] 7fc3f378 4b6a57c1 60000000 7c210b78 <e92d000089290009 792affe3 40820070

The bug is that kvmppc_run_vcpu does not correctly handle the case
where a vcpu task receives a signal while its guest vcpu is executing
in the guest as a result of being piggy-backed onto the execution of
another vcore.  In that case we need to wait for the vcpu to finish
executing inside the guest, and then remove this vcore from the
preempted vcores list.  That way, we avoid leaving this vcpu's vcore
on the preempted vcores list when the vcpu gets interrupted.

Fixes: ec2571650826
Reported-by: Thomas Huth <thuth@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
9 years agoLinux 4.3-rc2
Linus Torvalds [Sun, 20 Sep 2015 21:32:34 +0000 (14:32 -0700)]
Linux 4.3-rc2

9 years agothermal: power_allocator: exit early if there are no cooling devices
Javi Merino [Mon, 14 Sep 2015 13:23:54 +0000 (14:23 +0100)]
thermal: power_allocator: exit early if there are no cooling devices

Don't waste cycles in the power allocator governor's throttle function
if there are no cooling devices and exit early.

This commit doesn't change any functionality, but should provide better
performance for the odd case of a thermal zone with trip points but
without cooling devices.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
9 years agoMerge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 20 Sep 2015 04:05:02 +0000 (21:05 -0700)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Three fixes and a resulting cleanup for -rc2:

   - Andre Przywara reported that he was seeing a warning with the new
     cast inside DMA_ERROR_CODE's definition, and fixed the incorrect
     use.

   - Doug Anderson noticed that kgdb causes a "scheduling while atomic"
     bug.

   - OMAP5 folk noticed that their Thumb-2 compiled X servers crashed
     when enabling support to cover ARMv6 CPUs due to a kernel bug
     leaking some conditional context into the signal handler"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints
  ARM: 8437/1: dma-mapping: fix build warning with new DMA_ERROR_CODE definition
  ARM: get rid of needless #if in signal handling code
  ARM: fix Thumb2 signal handling when ARMv6 is enabled

9 years agoMerge tag 'linux-kselftest-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 20 Sep 2015 03:57:45 +0000 (20:57 -0700)]
Merge tag 'linux-kselftest-4.3-rc2' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "This update contains 7 fixes for problems ranging from build failurs
  to incorrect error reporting"

* tag 'linux-kselftest-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: exec: revert to default emit rule
  selftests: change install command to rsync
  selftests: mqueue: simplify the Makefile
  selftests: mqueue: allow extra cflags
  selftests: rename jump label to static_keys
  selftests/seccomp: add support for s390
  seltests/zram: fix syntax error

9 years agoMerge tag 'pm+acpi-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sun, 20 Sep 2015 03:41:31 +0000 (20:41 -0700)]
Merge tag 'pm+acpi-4.3-rc2' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management and ACPI updates from Rafael Wysocki:
 "Included are: a somewhat late devfreq update which however is mostly
  fixes and cleanups with one new thing only (the PPMUv2 support on
  Exynos5433), an ACPI cpufreq driver fixup and two ACPI core cleanups
  related to preprocessor directives.

  Specifics:

   - Fix a memory allocation size in the devfreq core (Xiaolong Ye).

   - Fix a mistake in the exynos-ppmu DT binding (Javier Martinez
     Canillas).

   - Add support for PPMUv2 ((Platform Performance Monitoring Unit
     version 2.0) on the Exynos5433 SoCs (Chanwoo Choi).

   - Fix a type casting bug in the Exynos PPMU code (MyungJoo Ham).

   - Assorted devfreq code cleanups and optimizations (Javi Merino,
     MyungJoo Ham, Viresh Kumar).

   - Fix up the ACPI cpufreq driver to use a more lightweight way to get
     to its private data in the ->get() callback (Rafael J Wysocki).

   - Fix a CONFIG_ prefix bug in one of the ACPI drivers and make the
     ACPI subsystem use IS_ENABLED() instead of #ifdefs in function
     bodies (Sudeep Holla)"

* tag 'pm+acpi-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: acpi-cpufreq: Use cpufreq_cpu_get_raw() in ->get()
  ACPI: Eliminate CONFIG_.*{, _MODULE} #ifdef in favor of IS_ENABLED()
  ACPI: int340x_thermal: add missing CONFIG_ prefix
  PM / devfreq: Fix incorrect type issue.
  PM / devfreq: tegra: Update governor to use devfreq_update_stats()
  PM / devfreq: comments for get_dev_status usage updated
  PM / devfreq: drop comment about thermal setting max_freq
  PM / devfreq: cache the last call to get_dev_status()
  PM / devfreq: Drop unlikely before IS_ERR(_OR_NULL)
  PM / devfreq: exynos-ppmu: bit-wise operation bugfix.
  PM / devfreq: exynos-ppmu: Update documentation to support PPMUv2
  PM / devfreq: exynos-ppmu: Add the support of PPMUv2 for Exynos5433
  PM / devfreq: event: Remove incorrect property in exynos-ppmu DT binding

9 years agoMerge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 20 Sep 2015 03:17:40 +0000 (20:17 -0700)]
Merge tag 'clk-fixes-for-linus' of git://git./linux/kernel/git/clk/linux

Pull clk fixes from Stephen Boyd:
 "A few driver fixes for tegra, rockchip, and st SoCs and a two-liner in
  the framework to avoid oops when get_parent ops return out of range
  values on tegra platforms"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  drivers: clk: st: Rename st_pll3200c32_407_c0_x into st_pll3200c32_cx_x
  clk: check for invalid parent index of orphans in __clk_init()
  clk: tegra: dfll: Properly protect OPP list
  clk: rockchip: add critical clock for rk3368

9 years agoMerge tag 'led-fixes-for-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 20 Sep 2015 03:10:30 +0000 (20:10 -0700)]
Merge tag 'led-fixes-for-v4.3-rc2' of git://git./linux/kernel/git/j.anaszewski/linux-leds

Pull LED fixes from Jacek Anaszewski:
 - fix module autoload for six OF platform drivers (aat1290, bcm6328,
   bcm6358, ktd2692, max77693, ns2)
 - aat1290: add missing static modifier
 - ipaq-micro: add missing LEDS_CLASS dependency
 - lp55xx: correct Kconfig dependecy for f/w user helper

* tag 'led-fixes-for-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
  leds:lp55xx: Correct Kconfig dependency for f/w user helper
  leds: leds-ipaq-micro: Add LEDS_CLASS dependency
  leds: aat1290: add 'static' modifier to init_mm_current_scale
  leds: leds-ns2: Fix module autoload for OF platform driver
  leds: max77693: Fix module autoload for OF platform driver
  leds: ktd2692: Fix module autoload for OF platform driver
  leds: bcm6358: Fix module autoload for OF platform driver
  leds: bcm6328: Fix module autoload for OF platform driver
  leds: aat1290: Fix module autoload for OF platform driver

9 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sun, 20 Sep 2015 03:04:11 +0000 (20:04 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "The new hfi1 driver in staging/rdma has had a number of fixup patches
  since being added to the tree.  This is the first batch of those fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/hfi: Properly set permissions for user device files
  IB/hfi1: mask vs shift confusion
  IB/hfi1: clean up some defines
  IB/hfi1: info leak in get_ctxt_info()
  IB/hfi1: fix a locking bug
  IB/hfi1: checking for NULL instead of IS_ERR
  IB/hfi1: fix sdma_descq_cnt parameter parsing
  IB/hfi1: fix copy_to/from_user() error handling
  IB/hfi1: fix pstateinfo from returning improperly byteswapped value

9 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Sun, 20 Sep 2015 02:13:03 +0000 (19:13 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:

 - a boot regression (since v4.2) fix for some ARM configurations from
   Tyler

 - regression (since v4.1) fixes for mkfs.xfs on a DAX enabled device
   from Jeff.  These are tagged for -stable.

 - a pair of locking fixes from Axel that are hidden from lockdep since
   they involve device_lock().  The "btt" one is tagged for -stable, the
   other only applies to the new "pfn" mechanism in v4.3.

 - a fix for the pmem ->rw_page() path to use wmb_pmem() from Ross.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  mm: fix type cast in __pfn_to_phys()
  pmem: add proper fencing to pmem_rw_page()
  libnvdimm: pfn_devs: Fix locking in namespace_store
  libnvdimm: btt_devs: Fix locking in namespace_store
  blockdev: don't set S_DAX for misaligned partitions
  dax: fix O_DIRECT I/O to the last block of a blockdev