cascardo/linux.git
7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Sat, 25 Jun 2016 01:43:58 +0000 (18:43 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid

Pull HID fix from Jiri Kosina:
 "hiddev ioctl() validation fix from Scott Bauer"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands

7 years agoMerge tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 Jun 2016 01:36:15 +0000 (18:36 -0700)]
Merge tag 'hwmon-for-linus-v4.7-rc5' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Improve fan type detection for dell-smm to prevent kernel hang"

* tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (dell-smm) Cache fan_type() calls and change fan detection

7 years agoMerge tag 'acpi-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sat, 25 Jun 2016 01:29:55 +0000 (18:29 -0700)]
Merge tag 'acpi-4.7-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Stable-candidate fix for a deadlock in ACPICA introduced during the
  4.5 development cycle by a commit attempting to improve the handling
  of AML code that doesn't belong to any namespace objects in a given
  definition block (Lv Zheng)"

* tag 'acpi-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: Namespace: Fix deadlock triggered by MLC support in dynamic table loading

7 years agoMerge tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Sat, 25 Jun 2016 01:03:22 +0000 (18:03 -0700)]
Merge tag 'pm-4.7-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Fix for a latent cpufreq driver bug uncovered by a recent ACPICA
  change and several fixes for the devfreq framework, including one fix
  for an issue introduced recently.

  Specifics:

   - Fix a latent initialization issue in the pcc-cpufreq driver
     (incorrect initial value of a structure field) that has been
     uncovered by a recent ACPICA commit (Mike Galbraith).

   - Add a missing notification in an update_devfreq() error code path
     forgotten by a recent devfreq commit (Chanwoo Choi).

   - Fix devfreq device frequency initialization (Lukasz Luba).

   - Fix an incorrect IS_ERR() check in the devfreq framework discovered
     by the Smatch checker (Dan Carpenter).

   - Drop two excessive put_device() calls from the devfreq framework
     (MyungJoo Ham, Cai Zhiyong).

   - Fix a possible memory leak in the devfreq framework and drop an
     unnecessary kfree() invocation from it (MyungJoo Ham)"

* tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed
  cpufreq: pcc-cpufreq: Fix doorbell.access_width
  PM / devfreq: fix initialization of current frequency in last status
  PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check
  PM / devfreq: remove double put_device
  PM / devfreq: fix double call put_device
  PM / devfreq: fix duplicated kfree on devfreq pointer
  PM / devfreq: devm_kzalloc to have dev pointer more precisely

7 years agoMerge tag 'for-linus-4.7b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 25 Jun 2016 00:57:37 +0000 (17:57 -0700)]
Merge tag 'for-linus-4.7b-rc4-tag' of git://git./linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - fix x86 PV dom0 crash during early boot on some hardware

 - fix two pciback bugs affects certain devices

 - fix potential overflow when clearing page tables in x86 PV

* tag 'for-linus-4.7b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen-pciback: return proper values during BAR sizing
  x86/xen: avoid m2p lookup when setting early page table entries
  xen/pciback: Fix conf_space read/write overlap check.
  x86/xen: fix upper bound of pmd loop in xen_cleanhighmap()
  xen/balloon: Fix declared-but-not-defined warning

7 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 25 Jun 2016 00:51:14 +0000 (17:51 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Here are a few more arm64 fixes, but things do finally appear to be
  slowing down.  The main fix is avoiding hibernation in a previously
  unanticipated situation where we have CPUs parked in the kernel, but
  it's all good stuff.

   - Fix icache/dcache sync for anonymous pages under migration
   - Correct the ASID limit check
   - Fix parallel builds of Image and Image.gz
   - Refuse to hibernate when we have CPUs that we can't offline"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: hibernate: Don't hibernate on systems with stuck CPUs
  arm64: smp: Add function to determine if cpus are stuck in the kernel
  arm64: mm: remove page_mapping check in __sync_icache_dcache
  arm64: fix boot image dependencies to not generate invalid images
  arm64: update ASID limit

7 years agoMerge tag 'nfsd-4.7-2' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Sat, 25 Jun 2016 00:22:27 +0000 (17:22 -0700)]
Merge tag 'nfsd-4.7-2' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfixes from Bruce Fields:
 "Fix missing server-side permission checks on setting NFS ACLs"

* tag 'nfsd-4.7-2' of git://linux-nfs.org/~bfields/linux:
  nfsd: check permissions when setting ACLs
  posix_acl: Add set_posix_acl

7 years agofix up initial thread stack pointer vs thread_info confusion
Linus Torvalds [Sat, 25 Jun 2016 00:07:33 +0000 (17:07 -0700)]
fix up initial thread stack pointer vs thread_info confusion

The INIT_TASK() initializer was similarly confused about the stack vs
thread_info allocation that the allocators had, and that were fixed in
commit b235beea9e99 ("Clarify naming of thread info/stack allocators").

The task ->stack pointer only incidentally ends up having the same value
as the thread_info, and in fact that will change.

So fix the initial task struct initializer to point to 'init_stack'
instead of 'init_thread_info', and make sure the ia64 definition for
that exists.

This actually makes the ia64 tsk->stack pointer be sensible for the
initial task, but not for any other task.  As mentioned in commit
b235beea9e99, that whole pointer isn't actually used on ia64, since
task_stack_page() there just points to the (single) allocation.

All the other architectures seem to have copied the 'init_stack'
definition, even if it tended to be generally unusued.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agox86: fix up a few misc stack pointer vs thread_info confusions
Linus Torvalds [Fri, 24 Jun 2016 23:55:53 +0000 (16:55 -0700)]
x86: fix up a few misc stack pointer vs thread_info confusions

As the actual pointer value is the same for the thread stack allocation
and the thread_info, code that confused the two worked fine, but will
break when the thread info is moved away from the stack allocation.  It
also looks very confusing.

For example, the kprobe code wanted to know the current top of stack.
To do that, it used this:

(unsigned long)current_thread_info() + THREAD_SIZE

which did indeed give the correct value.  But it's not only a fairly
nonsensical expression, it's also rather complex, especially since we
actually have this:

static inline unsigned long current_top_of_stack(void)

which not only gives us the value we are interested in, but happens to
be how "current_thread_info()" is currently defined as:

(struct thread_info *)(current_top_of_stack() - THREAD_SIZE);

so using current_thread_info() to figure out the top of the stack really
is a very round-about thing to do.

The other cases are just simpler confusion about task_thread_info() vs
task_stack_page(), which currently return the same pointer - but if you
want the stack page, you really should be using the latter one.

And there was one entirely unused assignment of the current stack to a
thread_info pointer.

All cleaned up to make more sense today, and make it easier to move the
thread_info away from the stack in the future.

No semantic changes.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoClarify naming of thread info/stack allocators
Linus Torvalds [Fri, 24 Jun 2016 22:09:37 +0000 (15:09 -0700)]
Clarify naming of thread info/stack allocators

We've had the thread info allocated together with the thread stack for
most architectures for a long time (since the thread_info was split off
from the task struct), but that is about to change.

But the patches that move the thread info to be off-stack (and a part of
the task struct instead) made it clear how confused the allocator and
freeing functions are.

Because the common case was that we share an allocation with the thread
stack and the thread_info, the two pointers were identical.  That
identity then meant that we would have things like

ti = alloc_thread_info_node(tsk, node);
...
tsk->stack = ti;

which certainly _worked_ (since stack and thread_info have the same
value), but is rather confusing: why are we assigning a thread_info to
the stack? And if we move the thread_info away, the "confusing" code
just gets to be entirely bogus.

So remove all this confusion, and make it clear that we are doing the
stack allocation by renaming and clarifying the function names to be
about the stack.  The fact that the thread_info then shares the
allocation is an implementation detail, and not really about the
allocation itself.

This is a pure renaming and type fix: we pass in the same pointer, it's
just that we clarify what the pointer means.

The ia64 code that actually only has one single allocation (for all of
task_struct, thread_info and kernel thread stack) now looks a bit odd,
but since "tsk->stack" is actually not even used there, that oddity
doesn't matter.  It would be a separate thing to clean that up, I
intentionally left the ia64 changes as a pure brute-force renaming and
type change.

Acked-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge branches 'pm-devfreq-fixes' and 'pm-cpufreq-fixes'
Rafael J. Wysocki [Fri, 24 Jun 2016 21:37:23 +0000 (23:37 +0200)]
Merge branches 'pm-devfreq-fixes' and 'pm-cpufreq-fixes'

* pm-devfreq-fixes:
  PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed
  PM / devfreq: fix initialization of current frequency in last status
  PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check
  PM / devfreq: remove double put_device
  PM / devfreq: fix double call put_device
  PM / devfreq: fix duplicated kfree on devfreq pointer
  PM / devfreq: devm_kzalloc to have dev pointer more precisely

* pm-cpufreq-fixes:
  cpufreq: pcc-cpufreq: Fix doorbell.access_width

7 years agoMerge branch 'acpica-fixes'
Rafael J. Wysocki [Fri, 24 Jun 2016 21:36:20 +0000 (23:36 +0200)]
Merge branch 'acpica-fixes'

* acpica-fixes:
  ACPICA: Namespace: Fix deadlock triggered by MLC support in dynamic table loading

7 years agonfsd: check permissions when setting ACLs
Ben Hutchings [Wed, 22 Jun 2016 18:43:35 +0000 (19:43 +0100)]
nfsd: check permissions when setting ACLs

Use set_posix_acl, which includes proper permission checks, instead of
calling ->set_acl directly.  Without this anyone may be able to grant
themselves permissions to a file by setting the ACL.

Lock the inode to make the new checks atomic with respect to set_acl.
(Also, nfsd was the only caller of set_acl not locking the inode, so I
suspect this may fix other races.)

This also simplifies the code, and ensures our ACLs are checked by
posix_acl_valid.

The permission checks and the inode locking were lost with commit
4ac7249e, which changed nfsd to use the set_acl inode operation directly
instead of going through xattr handlers.

Reported-by: David Sinquin <david@sinquin.eu>
[agreunba@redhat.com: use set_posix_acl]
Fixes: 4ac7249e
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
7 years agoposix_acl: Add set_posix_acl
Andreas Gruenbacher [Wed, 22 Jun 2016 21:57:25 +0000 (23:57 +0200)]
posix_acl: Add set_posix_acl

Factor out part of posix_acl_xattr_set into a common function that takes
a posix_acl, which nfsd can also call.

The prototype already exists in include/linux/posix_acl.h.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Cc: stable@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
7 years agoxen-pciback: return proper values during BAR sizing
Jan Beulich [Fri, 24 Jun 2016 09:13:34 +0000 (03:13 -0600)]
xen-pciback: return proper values during BAR sizing

Reads following writes with all address bits set to 1 should return all
changeable address bits as one, not the BAR size (nor, as was the case
for the upper half of 64-bit BARs, the high half of the region's end
address). Presumably this didn't cause any problems so far because
consumers use the value to calculate the size (usually via val & -val),
and do nothing else with it.

But also consider the exception here: Unimplemented BARs should always
return all zeroes.

And finally, the check for whether to return the sizing address on read
for the ROM BAR should ignore all non-address bits, not just the ROM
Enable one.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
7 years agoHID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands
Scott Bauer [Thu, 23 Jun 2016 14:59:47 +0000 (08:59 -0600)]
HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands

This patch validates the num_values parameter from userland during the
HIDIOCGUSAGES and HIDIOCSUSAGES commands. Previously, if the report id was set
to HID_REPORT_ID_UNKNOWN, we would fail to validate the num_values parameter
leading to a heap overflow.

Cc: stable@vger.kernel.org
Signed-off-by: Scott Bauer <sbauer@plzdonthack.me>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
7 years agoMerge tag 'upstream-4.7-rc5' of git://git.infradead.org/linux-ubifs
Linus Torvalds [Fri, 24 Jun 2016 05:48:48 +0000 (22:48 -0700)]
Merge tag 'upstream-4.7-rc5' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS fixes from Richard Weinberger:
 "This contains fixes for two critical bugs in UBI and UBIFS:

   - fix the possibility of losing data upon a power cut when UBI tries
     to recover from a write error

   - fix page migration on UBIFS.  It turned out that the default page
     migration function is not suitable for UBIFS"

* tag 'upstream-4.7-rc5' of git://git.infradead.org/linux-ubifs:
  UBIFS: Implement ->migratepage()
  mm: Export migrate_page_move_mapping and migrate_page_copy
  ubi: Make recover_peb power cut aware
  gpio: make library immune to error pointers
  gpio: make sure gpiod_to_irq() returns negative on NULL desc
  gpio: 104-idi-48: Fix missing spin_lock_init for ack_lock

7 years agoMerge tag 'drm-fixes-for-v4.7-rc5' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 24 Jun 2016 04:35:12 +0000 (21:35 -0700)]
Merge tag 'drm-fixes-for-v4.7-rc5' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "This is the drm fixes tree for 4.7-rc5.

  It's a bit larger than normal, due to fixes for production AMD Polaris
  GPUs.  We only merged support for these in 4.7-rc1 so it would be good
  if we got all the fixes into final.  The changes don't hit any other
  hardware.

  Other than the amdgpu Polaris changes:

   - A single fix for atomic modesetting WARN
   - Nouveau fix for when fbdev is disabled
   - i915 fixes for FBC on Haswell and displayport regression
   - Exynos fix for a display panel regression and some other minor changes
   - Atmel fixes for scaling and OF graph interaction
   - Allwiinner build, warning and probing fixes
   - AMD GPU non-polaris fix for num_rbs and some minor fixes

  Also I've just moved house, and my new place is Internet challenged
  due to incompetent incumbent ISPs, hopefully sorted out in a couple of
  weeks, so I might not be too responsive over the next while.  It also
  helps Daniel is on holidays for those couple of weeks as well"

* tag 'drm-fixes-for-v4.7-rc5' of git://people.freedesktop.org/~airlied/linux: (38 commits)
  drm/atomic: Make drm_atomic_legacy_backoff reset crtc->acquire_ctx
  drm/nouveau: fix for disabled fbdev emulation
  drm/i915/fbc: Disable on HSW by default for now
  drm/i915: Revert DisplayPort fast link training feature
  drm/amd/powerplay: enable clock stretch feature for polaris
  drm/amdgpu/gfx8: update golden setting for polaris10
  drm/amd/powerplay: enable avfs feature for polaris
  drm/amdgpu/atombios: add avfs struct for Polaris10/11
  drm/amd/powerplay: add avfs related define for polaris
  drm/amd/powrplay: enable stutter_mode for polaris.
  drm/amd/powerplay: disable UVD SMU handshake for MCLK.
  drm/amd/powerplay: initialize variables which were missed.
  drm/amd/powerplay: enable PowerContainment feature for polaris10/11.
  drm/amd/powerplay: need to notify system bios pcie device ready
  drm/amd/powerplay: fix bug that function parameter was incorect.
  drm/amd/powerplay: fix logic error.
  drm: atmel-hlcdc: Fix OF graph parsing
  drm: atmel-hlcdc: actually disable scaling when no scaling is required
  drm/amdgpu: initialize amdgpu_cgs_acpi_eval_object result value
  drm/amdgpu: precedence bug in amdgpu_device_init()
  ...

7 years agoMerge tag 'pci-v4.7-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Linus Torvalds [Fri, 24 Jun 2016 03:59:14 +0000 (20:59 -0700)]
Merge tag 'pci-v4.7-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Here's a small fix for v4.7.  This problem was actually introduced in
  v4.6 when we unified Kconfig, making PCIe support available everywhere
  including sparc, where config reads into unaligned buffers cause
  warnings.  This fix is from Dave Miller.

  As a reminder, any future PCI fixes for v4.7 will probably come from
  Alex Williamson, since I'll be on vacation for most of the rest of
  this cycle.  I should be back about the time the merge window opens"

* tag 'pci-v4.7-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Fix unaligned accesses in VC code

7 years agodrm/atomic: Make drm_atomic_legacy_backoff reset crtc->acquire_ctx
Maarten Lankhorst [Thu, 23 Jun 2016 11:45:06 +0000 (13:45 +0200)]
drm/atomic: Make drm_atomic_legacy_backoff reset crtc->acquire_ctx

Atomic updates may acquire more state than initially locked through
drm_modeset_lock_crtc, running with heavy stress can cause a
WARN_ON(crtc->acquire_ctx) in drm_modeset_lock_crtc:

[  601.491296] ------------[ cut here ]------------
[  601.491366] WARNING: CPU: 0 PID: 2411 at
drivers/gpu/drm/drm_modeset_lock.c:191 drm_modeset_lock_crtc+0xeb/0xf0 [drm]
[  601.491369] Modules linked in: drm i915 drm_kms_helper
[  601.491414] CPU: 0 PID: 2411 Comm: kms_cursor_lega Tainted: G     U 4.7.0-rc4-patser+ #4798
[  601.491417] Hardware name: Intel Corporation Skylake Client
[  601.491420]  0000000000000000 ffff88044d153c98 ffffffff812ead28 0000000000000000
[  601.491425]  0000000000000000 ffff88044d153cd8 ffffffff810868e6 000000bf58058030
[  601.491431]  ffff880088b415e8 ffff880458058030 ffff88008a271548 ffff88008a271568
[  601.491436] Call Trace:
[  601.491443]  [<ffffffff812ead28>] dump_stack+0x4d/0x65
[  601.491447]  [<ffffffff810868e6>] __warn+0xc6/0xe0
[  601.491452]  [<ffffffff81086968>] warn_slowpath_null+0x18/0x20
[  601.491472]  [<ffffffffc00d4ffb>] drm_modeset_lock_crtc+0xeb/0xf0 [drm]
[  601.491491]  [<ffffffffc00c5526>] drm_mode_cursor_common+0x66/0x180 [drm]
[  601.491509]  [<ffffffffc00c91cc>] drm_mode_cursor_ioctl+0x3c/0x40 [drm]
[  601.491524]  [<ffffffffc00bc94d>] drm_ioctl+0x14d/0x530 [drm]
[  601.491540]  [<ffffffffc00c9190>] ? drm_mode_setcrtc+0x520/0x520 [drm]
[  601.491545]  [<ffffffff81176aeb>] ? handle_mm_fault+0x106b/0x1430
[  601.491550]  [<ffffffff81108441>] ? stop_one_cpu+0x61/0x70
[  601.491556]  [<ffffffff811bb71d>] do_vfs_ioctl+0x8d/0x570
[  601.491560]  [<ffffffff81290d7e>] ? security_file_ioctl+0x3e/0x60
[  601.491565]  [<ffffffff811bbc74>] SyS_ioctl+0x74/0x80
[  601.491571]  [<ffffffff810e321c>] ? posix_get_monotonic_raw+0xc/0x10
[  601.491576]  [<ffffffff8175b11b>] entry_SYSCALL_64_fastpath+0x13/0x8f
[  601.491581] ---[ end trace 56f3d3d85f000d00 ]---

For good measure, test mode_config.acquire_ctx too, although this should
never happen.

Testcase: kms_cursor_legacy
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
7 years agoMerge branch 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Fri, 24 Jun 2016 00:51:12 +0000 (10:51 +1000)]
Merge branch 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

A bit bigger than I would normally like, but most of the large changes are
for polaris support and since polaris went upstream in 4.7, I'd like
to get the fixes in so it's in good shape when the hw becomes available.
The major changes only touch the polaris code so there is little chance
for regressions on other asics.  The rest are just the usual collection
of bug fixes.

* 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux:
  drm/amd/powerplay: enable clock stretch feature for polaris
  drm/amdgpu/gfx8: update golden setting for polaris10
  drm/amd/powerplay: enable avfs feature for polaris
  drm/amdgpu/atombios: add avfs struct for Polaris10/11
  drm/amd/powerplay: add avfs related define for polaris
  drm/amd/powrplay: enable stutter_mode for polaris.
  drm/amd/powerplay: disable UVD SMU handshake for MCLK.
  drm/amd/powerplay: initialize variables which were missed.
  drm/amd/powerplay: enable PowerContainment feature for polaris10/11.
  drm/amd/powerplay: need to notify system bios pcie device ready
  drm/amd/powerplay: fix bug that function parameter was incorect.
  drm/amd/powerplay: fix logic error.
  drm/amdgpu: initialize amdgpu_cgs_acpi_eval_object result value
  drm/amdgpu: precedence bug in amdgpu_device_init()
  drm/amdgpu: fix num_rbs exposed to userspace (v2)
  drm/amdgpu: missing bounds check in amdgpu_set_pp_force_state()

7 years agoMerge branch 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Dave Airlie [Fri, 24 Jun 2016 00:35:03 +0000 (10:35 +1000)]
Merge branch 'exynos-drm-fixes' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-fixes

Since HW trigger mode was suppoted we have faced with a issue
that Display panel didn't work correctly when trigger mode was changed
in booting time.
For this, we keep trigger mode with SW trigger mode in default mode
like we did before.

However, we will need to consider PSR(Panel Self Reflash) mode to resolve
this issue fundamentally later.

* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm/exynos: use logical AND in exynos_drm_plane_check_size()
  drm/exynos: remove superfluous inclusions of fbdev header
  drm/exynos: g2d: drop the _REG postfix from the stride defines
  drm/exynos: don't use HW trigger for Exynos5420/5422/5800
  drm/exynos: fimd: don't set .has_hw_trigger in s3c6400 driver data
  drm/exynos: dp: Fix NULL pointer dereference due uninitialized connector

7 years agoMerge tag 'drm-atmel-hlcdc-fixes/for-4.7-rc5' of github.com:bbrezillon/linux-at91...
Dave Airlie [Fri, 24 Jun 2016 00:34:49 +0000 (10:34 +1000)]
Merge tag 'drm-atmel-hlcdc-fixes/for-4.7-rc5' of github.com:bbrezillon/linux-at91 into drm-fixes

Two bug fixes for the atmel-hlcdc driver.

* tag 'drm-atmel-hlcdc-fixes/for-4.7-rc5' of github.com:bbrezillon/linux-at91:
  drm: atmel-hlcdc: Fix OF graph parsing
  drm: atmel-hlcdc: actually disable scaling when no scaling is required

7 years agoMerge tag 'sunxi-drm-fixes-for-4.7' of https://git.kernel.org/pub/scm/linux/kernel...
Dave Airlie [Fri, 24 Jun 2016 00:34:35 +0000 (10:34 +1000)]
Merge tag 'sunxi-drm-fixes-for-4.7' of https://git./linux/kernel/git/mripard/linux into drm-fixes

Allwinner sun4i DRM driver fixes

A bunch of fixes that address:
  - Compilation errors in various corner cases
  - Move to helpers
  - Fix the pixel clock computation
  - Fix our panel probe

* tag 'sunxi-drm-fixes-for-4.7' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  drm: sun4i: do cleanup if RGB output init fails
  drm/sun4i: Convert to connector register helpers
  drm/sun4i: remove simplefb at probe
  drm/sun4i: rgb: panel is an error pointer
  drm/sun4i: defer only if we didn't find our panel
  drm/sun4i: rgb: Validate the clock rate
  drm/sun4i: request exact rates to our parents
  drm: sun4i: fix probe error handling
  drm: sun4i: print DMA address correctly
  drm/sun4i: add COMMON_CLK dependency

7 years agoMerge tag 'drm-intel-fixes-2016-06-22' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 24 Jun 2016 00:32:30 +0000 (10:32 +1000)]
Merge tag 'drm-intel-fixes-2016-06-22' of git://anongit.freedesktop.org/drm-intel into drm-fixes

 Hi Dave, just a couple of display fixes, both stable stuff. Maybe we'll
be able to enable fbc by default one day.

* tag 'drm-intel-fixes-2016-06-22' of git://anongit.freedesktop.org/drm-intel:
  drm/i915/fbc: Disable on HSW by default for now
  drm/i915: Revert DisplayPort fast link training feature

7 years agoMerge branch 'linux-4.7' of git://github.com/skeggsb/linux into drm-fixes
Dave Airlie [Fri, 24 Jun 2016 00:16:37 +0000 (10:16 +1000)]
Merge branch 'linux-4.7' of git://github.com/skeggsb/linux into drm-fixes

* 'linux-4.7' of git://github.com/skeggsb/linux:
  drm/nouveau: fix for disabled fbdev emulation

7 years agodrm/nouveau: fix for disabled fbdev emulation
Dmitrii Tcvetkov [Mon, 20 Jun 2016 10:52:14 +0000 (13:52 +0300)]
drm/nouveau: fix for disabled fbdev emulation

Hello,

after this commit:

commit f045f459d925138fe7d6193a8c86406bda7e49da
Author: Ben Skeggs <bskeggs@redhat.com>
Date:   Thu Jun 2 12:23:31 2016 +1000
    drm/nouveau/fbcon: fix out-of-bounds memory accesses

kernel started to oops when loading nouveau module when using GTX 780 Ti
video adapter. This patch fixes the problem.

Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=120591

Signed-off-by: Dmitrii Tcvetkov <demfloro@demfloro.ru>
Suggested-by: Ilia Mirkin <imirkin@alum.mit.edu>
Fixes: f045f459d925 ("nouveau_fbcon_init()")
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
7 years agoPM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed
Chanwoo Choi [Thu, 23 Jun 2016 02:18:43 +0000 (11:18 +0900)]
PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed

This patch sends the DEVFREQ_POSTCHANGE notification when
devfreq->profile->targer() is failed. The PRECHANGE/POSTCHANGE
should be paired.

Fixes: 0fe3a66410a3 (PM / devfreq: Add new DEVFREQ_TRANSITION_NOTIFIER notifier)
Reported-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
7 years agocpufreq: pcc-cpufreq: Fix doorbell.access_width
Mike Galbraith [Thu, 23 Jun 2016 06:45:42 +0000 (08:45 +0200)]
cpufreq: pcc-cpufreq: Fix doorbell.access_width

Commit 920de6ebfab8 (ACPICA: Hardware: Enhance
acpi_hw_validate_register() with access_width/bit_offset awareness)
apparently exposed a latent bug, doorbell.access_width is initialized
to 64, but per Lv Zheng, it should be 4, and indeed, making that
change does bring pcc-cpufreq back to life.

Fixes: 920de6ebfab8 (ACPICA: Hardware: Enhance acpi_hw_validate_register() with access_width/bit_offset awareness)
Suggested-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
7 years agox86: avoid avoid passing around 'thread_info' in stack dumping code
Linus Torvalds [Thu, 23 Jun 2016 19:20:01 +0000 (12:20 -0700)]
x86: avoid avoid passing around 'thread_info' in stack dumping code

None of the code actually wants a thread_info, it all wants a
task_struct, and it's just converting to a thread_info pointer much too
early.

No semantic change.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agolocking: avoid passing around 'thread_info' in mutex debugging code
Linus Torvalds [Thu, 23 Jun 2016 19:11:17 +0000 (12:11 -0700)]
locking: avoid passing around 'thread_info' in mutex debugging code

None of the code actually wants a thread_info, it all wants a
task_struct, and it's just converting back and forth between the two
("ti->task" to get the task_struct from the thread_info, and
"task_thread_info(task)" to go the other way).

No semantic change.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agox86/xen: avoid m2p lookup when setting early page table entries
David Vrabel [Tue, 17 May 2016 14:54:50 +0000 (15:54 +0100)]
x86/xen: avoid m2p lookup when setting early page table entries

When page tables entries are set using xen_set_pte_init() during early
boot there is no page fault handler that could handle a fault when
performing an M2P lookup.

In 64 bit guests (usually dom0) early_ioremap() would fault in
xen_set_pte_init() because an M2P lookup faults because the MFN is in
MMIO space and not mapped in the M2P.  This lookup is done to see if
the PFN in in the range used for the initial page table pages, so that
the PTE may be set as read-only.

The M2P lookup can be avoided by moving the check (and clear of RW)
earlier when the PFN is still available.

Reported-by: Kevin Moraga <kmoragas@riseup.net>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
7 years agohwmon: (dell-smm) Cache fan_type() calls and change fan detection
Pali Rohár [Fri, 17 Jun 2016 22:54:47 +0000 (00:54 +0200)]
hwmon: (dell-smm) Cache fan_type() calls and change fan detection

On more Dell machines (e.g. Dell Precision M3800) fan_type() call is too
expensive (CPU is too long in SMM mode) and cause kernel to hang. This is
bug in Dell SMM or BIOS.

This patch caches type for each fan (as it should not change) and changes
the way how fan presense is detected. First it try function fan_status()
as was before commit f989e55452c7 ("i8k: Add support for fan labels"). And
if that fails fallback to fan_type(). *_status() functions can fail in case
fan is not currently accessible (e.g. present on GPU which is currently
turned off).

Reported-by: Tolga Cakir <cevelnet@gmail.com>
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=112021
Cc: stable@vger.kernel.org # v4.0+, will need backport
Tested-by: Tolga Cakir <cevelnet@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
7 years agoMerge branch 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq...
Rafael J. Wysocki [Thu, 23 Jun 2016 12:48:41 +0000 (14:48 +0200)]
Merge branch 'fixes' of https://git./linux/kernel/git/mzx/devfreq into pm-devfreq

Pull devfreq fixes for v4.7 from  MyungJoo Ham.

* 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq:
  PM / devfreq: fix initialization of current frequency in last status
  PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check
  PM / devfreq: remove double put_device
  PM / devfreq: fix double call put_device
  PM / devfreq: fix duplicated kfree on devfreq pointer
  PM / devfreq: devm_kzalloc to have dev pointer more precisely

7 years agoxen/pciback: Fix conf_space read/write overlap check.
Andrey Grodzovsky [Tue, 21 Jun 2016 18:26:36 +0000 (14:26 -0400)]
xen/pciback: Fix conf_space read/write overlap check.

Current overlap check is evaluating to false a case where a filter
field is fully contained (proper subset) of a r/w request.  This
change applies classical overlap check instead to include all the
scenarios.

More specifically, for (Hilscher GmbH CIFX 50E-DP(M/S)) device driver
the logic is such that the entire confspace is read and written in 4
byte chunks. In this case as an example, CACHE_LINE_SIZE,
LATENCY_TIMER and PCI_BIST are arriving together in one call to
xen_pcibk_config_write() with offset == 0xc and size == 4.  With the
exsisting overlap check the LATENCY_TIMER field (offset == 0xd, length
== 1) is fully contained in the write request and hence is excluded
from write, which is incorrect.

Signed-off-by: Andrey Grodzovsky <andrey2805@gmail.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Jan Beulich <JBeulich@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
7 years agox86/xen: fix upper bound of pmd loop in xen_cleanhighmap()
Juergen Gross [Thu, 23 Jun 2016 05:12:27 +0000 (07:12 +0200)]
x86/xen: fix upper bound of pmd loop in xen_cleanhighmap()

xen_cleanhighmap() is operating on level2_kernel_pgt only. The upper
bound of the loop setting non-kernel-image entries to zero should not
exceed the size of level2_kernel_pgt.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
7 years agoxen/balloon: Fix declared-but-not-defined warning
Ross Lagerwall [Tue, 10 May 2016 09:27:54 +0000 (10:27 +0100)]
xen/balloon: Fix declared-but-not-defined warning

Fix a declared-but-not-defined warning when building with
XEN_BALLOON_MEMORY_HOTPLUG=n. This fixes a regression introduced by
commit dfd74a1edfab ("xen/balloon: Fix crash when ballooning on x86 32
bit PAE").

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Acked-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
7 years agoUBIFS: Implement ->migratepage()
Kirill A. Shutemov [Thu, 16 Jun 2016 21:26:15 +0000 (23:26 +0200)]
UBIFS: Implement ->migratepage()

During page migrations UBIFS might get confused
and the following assert triggers:
[  213.480000] UBIFS assert failed in ubifs_set_page_dirty at 1451 (pid 436)
[  213.490000] CPU: 0 PID: 436 Comm: drm-stress-test Not tainted 4.4.4-00176-geaa802524636-dirty #1008
[  213.490000] Hardware name: Allwinner sun4i/sun5i Families
[  213.490000] [<c0015e70>] (unwind_backtrace) from [<c0012cdc>] (show_stack+0x10/0x14)
[  213.490000] [<c0012cdc>] (show_stack) from [<c02ad834>] (dump_stack+0x8c/0xa0)
[  213.490000] [<c02ad834>] (dump_stack) from [<c0236ee8>] (ubifs_set_page_dirty+0x44/0x50)
[  213.490000] [<c0236ee8>] (ubifs_set_page_dirty) from [<c00fa0bc>] (try_to_unmap_one+0x10c/0x3a8)
[  213.490000] [<c00fa0bc>] (try_to_unmap_one) from [<c00fadb4>] (rmap_walk+0xb4/0x290)
[  213.490000] [<c00fadb4>] (rmap_walk) from [<c00fb1bc>] (try_to_unmap+0x64/0x80)
[  213.490000] [<c00fb1bc>] (try_to_unmap) from [<c010dc28>] (migrate_pages+0x328/0x7a0)
[  213.490000] [<c010dc28>] (migrate_pages) from [<c00d0cb0>] (alloc_contig_range+0x168/0x2f4)
[  213.490000] [<c00d0cb0>] (alloc_contig_range) from [<c010ec00>] (cma_alloc+0x170/0x2c0)
[  213.490000] [<c010ec00>] (cma_alloc) from [<c001a958>] (__alloc_from_contiguous+0x38/0xd8)
[  213.490000] [<c001a958>] (__alloc_from_contiguous) from [<c001ad44>] (__dma_alloc+0x23c/0x274)
[  213.490000] [<c001ad44>] (__dma_alloc) from [<c001ae08>] (arm_dma_alloc+0x54/0x5c)
[  213.490000] [<c001ae08>] (arm_dma_alloc) from [<c035cecc>] (drm_gem_cma_create+0xb8/0xf0)
[  213.490000] [<c035cecc>] (drm_gem_cma_create) from [<c035cf20>] (drm_gem_cma_create_with_handle+0x1c/0xe8)
[  213.490000] [<c035cf20>] (drm_gem_cma_create_with_handle) from [<c035d088>] (drm_gem_cma_dumb_create+0x3c/0x48)
[  213.490000] [<c035d088>] (drm_gem_cma_dumb_create) from [<c0341ed8>] (drm_ioctl+0x12c/0x444)
[  213.490000] [<c0341ed8>] (drm_ioctl) from [<c0121adc>] (do_vfs_ioctl+0x3f4/0x614)
[  213.490000] [<c0121adc>] (do_vfs_ioctl) from [<c0121d30>] (SyS_ioctl+0x34/0x5c)
[  213.490000] [<c0121d30>] (SyS_ioctl) from [<c000f2c0>] (ret_fast_syscall+0x0/0x34)

UBIFS is using PagePrivate() which can have different meanings across
filesystems. Therefore the generic page migration code cannot handle this
case correctly.
We have to implement our own migration function which basically does a
plain copy but also duplicates the page private flag.
UBIFS is not a block device filesystem and cannot use buffer_migrate_page().

Cc: stable@vger.kernel.org
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
[rw: Massaged changelog, build fixes, etc...]
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Christoph Hellwig <hch@lst.de>
7 years agomm: Export migrate_page_move_mapping and migrate_page_copy
Richard Weinberger [Thu, 16 Jun 2016 21:26:14 +0000 (23:26 +0200)]
mm: Export migrate_page_move_mapping and migrate_page_copy

Export these symbols such that UBIFS can implement
->migratepage.

Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Christoph Hellwig <hch@lst.de>
7 years agoubi: Make recover_peb power cut aware
Richard Weinberger [Mon, 20 Jun 2016 22:31:50 +0000 (00:31 +0200)]
ubi: Make recover_peb power cut aware

recover_peb() was never power cut aware,
if a power cut happened right after writing the VID header
upon next attach UBI would blindly use the new partial written
PEB and all data from the old PEB is lost.

In order to make recover_peb() power cut aware, write the new
VID with a proper crc and copy_flag set such that the UBI attach
process will detect whether the new PEB is completely written
or not.
We cannot directly use ubi_eba_atomic_leb_change() since we'd
have to unlock the LEB which is facing a write error.

Cc: stable@vger.kernel.org
Reported-by: Jörg Pfähler <pfaehler@isse.de>
Reviewed-by: Jörg Pfähler <pfaehler@isse.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
7 years agogpio: make library immune to error pointers
Linus Walleij [Thu, 16 Jun 2016 09:55:55 +0000 (11:55 +0200)]
gpio: make library immune to error pointers

Most functions that take a GPIO descriptor in need to check the
descriptor for IS_ERR(). We do this mostly in the VALIDATE_DESC()
macro except for the gpiod_to_irq() function which needs special
handling.

Cc: stable@vger.kernel.org
Reported-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
7 years agogpio: make sure gpiod_to_irq() returns negative on NULL desc
Linus Walleij [Wed, 15 Jun 2016 20:57:38 +0000 (22:57 +0200)]
gpio: make sure gpiod_to_irq() returns negative on NULL desc

commit 54d77198fdfbc4f0fe11b4252c1d9c97d51a3264
("gpio: bail out silently on NULL descriptors")
doesn't work for gpiod_to_irq(): drivers assume that NULL
descriptors will give negative IRQ numbers in return.

It has been pointed out that returning 0 is NO_IRQ and that
drivers should be amended to treat this as an error, but that
is for the longer term: now let us repair the semantics.

Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Reported-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
7 years agogpio: 104-idi-48: Fix missing spin_lock_init for ack_lock
Axel Lin [Mon, 13 Jun 2016 05:48:53 +0000 (13:48 +0800)]
gpio: 104-idi-48: Fix missing spin_lock_init for ack_lock

Fixes: 9ae482104cb9 ("gpio: 104-idi-48: Clear pending interrupt once in IRQ handler")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
Linus Torvalds [Wed, 22 Jun 2016 21:11:24 +0000 (14:11 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull userns fix from Eric Biederman:
 "This contains just a single small patch that fixes a tiny hole in the
  logic of allowing unprivileged mounting of proc and sysfs.

  In practice I don't think anyone is affected because having MNT_RDONLY
  clear in mnt->mnt_flags but MS_RDONLY set in sb->s_flags is very weird
  for a filesystem, and weirder for proc and sysfs.  However if it
  happens let's handle it correctly and then no one has to to worry
  about this crazy case"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  mnt: Account for MS_RDONLY in fs_fully_visible

7 years agoMerge tag 'gpio-v4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Wed, 22 Jun 2016 17:13:25 +0000 (10:13 -0700)]
Merge tag 'gpio-v4.7-4' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "More GPIO fixes.  Most prominent the gpiod_to_irq() fix brought to my
  attention by Hans de Goede.  The hardening patch is a consequence of
  the reasoning around that bug.

   - It was discovered that too many parts of the kernel does not
     respect gpiod_to_irq() returning zero for an invalid IRQ.  While
     this gets fixed, we need to make it return negative errorcodes
     again.

   - Harden the library a bit when passed error pointers.  It is a bug
     to use these, but let's be helpful and warn the users.

   - Fix an uninitialized spinlock in the 104-idi-48 driver"

* tag 'gpio-v4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: make library immune to error pointers
  gpio: make sure gpiod_to_irq() returns negative on NULL desc
  gpio: 104-idi-48: Fix missing spin_lock_init for ack_lock

7 years agoarm64: hibernate: Don't hibernate on systems with stuck CPUs
James Morse [Wed, 22 Jun 2016 09:06:13 +0000 (10:06 +0100)]
arm64: hibernate: Don't hibernate on systems with stuck CPUs

Hibernate relies on cpu hotplug to prevent secondary cores executing
the kernel text while it is being restored.

Add a call to cpus_are_stuck_in_kernel() to determine if there are
CPUs not counted by 'num_online_cpus()', and prevent hibernate in this
case.

Fixes: 82869ac57b5 ("arm64: kernel: Add support for hibernate/suspend-to-disk")
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
7 years agoarm64: smp: Add function to determine if cpus are stuck in the kernel
James Morse [Wed, 22 Jun 2016 09:06:12 +0000 (10:06 +0100)]
arm64: smp: Add function to determine if cpus are stuck in the kernel

kernel/smp.c has a fancy counter that keeps track of the number of CPUs
it marked as not-present and left in cpu_park_loop(). If there are any
CPUs spinning in here, features like kexec or hibernate may release them
by overwriting this memory.

This problem also occurs on machines using spin-tables to release
secondary cores.
After commit 44dbcc93ab67 ("arm64: Fix behavior of maxcpus=N")
we bring all known cpus into the secondary holding pen, meaning this
memory can't be re-used by kexec or hibernate.

Add a function cpus_are_stuck_in_kernel() to determine if either of these
cases have occurred.

Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
7 years agoPM / devfreq: fix initialization of current frequency in last status
Lukasz Luba [Tue, 31 May 2016 10:25:09 +0000 (11:25 +0100)]
PM / devfreq: fix initialization of current frequency in last status

Some systems need current frequency from last_status for calculation
but it is zeroed during initialization. When the device starts there is
no history, but we can assume that the last frequency was the
same as the initial frequency (which is also used in 'previous_freq').
The log shows the result of this misinterpreted value.
[    2.042847] ... Failed to get voltage for frequency 0: -34

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
7 years agoPM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check
Dan Carpenter [Thu, 26 May 2016 06:45:42 +0000 (09:45 +0300)]
PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check

Smatch complains because platform_get_resource() returns NULL on error
and not an error pointer so the check is wrong.  Julia Lawall pointed
out that normally we don't check these, because devm_ioremap_resource()
has a check for NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
7 years agoPM / devfreq: remove double put_device
MyungJoo Ham [Mon, 16 May 2016 02:41:57 +0000 (11:41 +0900)]
PM / devfreq: remove double put_device

When device_register() returns with error, it has already
done put_device() on the input device pointer.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
7 years agoPM / devfreq: fix double call put_device
Cai Zhiyong [Sat, 14 May 2016 06:13:30 +0000 (14:13 +0800)]
PM / devfreq: fix double call put_device

1295  */
1296 void device_unregister(struct device *dev)
1297 {
1298         pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
1299         device_del(dev);
1300         put_device(dev);
1301 }
1302 EXPORT_SYMBOL_GPL(device_unregister);
1303

device_unregister is called put_device, there is no need to call
put_device(&devfreq->dev) again.

Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
7 years agoPM / devfreq: fix duplicated kfree on devfreq pointer
MyungJoo Ham [Fri, 2 Oct 2015 03:48:54 +0000 (12:48 +0900)]
PM / devfreq: fix duplicated kfree on devfreq pointer

device_unregister() calls kfree already.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
7 years agoPM / devfreq: devm_kzalloc to have dev pointer more precisely
MyungJoo Ham [Fri, 2 Oct 2015 03:39:23 +0000 (12:39 +0900)]
PM / devfreq: devm_kzalloc to have dev pointer more precisely

devm_kzalloc of devfreq's statistics data structure has been
using its parent device as the dev allocated for.
If a device's devfreq is disabled in run-time,
such allocated memory won't be freed.

Desginating more precisely with the devfreq device
pointer fixes the issue.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
7 years agoACPICA: Namespace: Fix deadlock triggered by MLC support in dynamic table loading
Lv Zheng [Tue, 21 Jun 2016 04:34:15 +0000 (12:34 +0800)]
ACPICA: Namespace: Fix deadlock triggered by MLC support in dynamic table loading

The new module-level code (MLC) approach invokes MLC on the per-table
basis, but the dynamic loading support of this is incorrect because
of the lock order:

 acpi_ns_evaluate
   acpi_ex_enter_intperter
     acpi_ns_load_table (triggered by Load opcode)
       acpi_ns_exec_module_code_list
         acpi_ex_enter_intperter

The regression is introduced by the following commit:

  Commit: 2785ce8d0da1cac9d8f78615e116cf929e9a9123
  ACPICA Commit: 071eff738c59eda1792ac24b3b688b61691d7e7c
  Subject: ACPICA: Add per-table execution of module-level code

This patch fixes this regression by unlocking the interpreter lock
before invoking MLC.  However, the unlocking is done to the
acpi_ns_load_table(), in which the interpreter lock should be locked
by acpi_ns_parse_table() but it wasn't.

Fixes: 2785ce8d0da1 (ACPICA: Add per-table execution of module-level code)
Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: 4.5+ <stable@vger.kernel.org> # 4.5+
[ rjw : Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
7 years agoarm64: mm: remove page_mapping check in __sync_icache_dcache
Shaokun Zhang [Tue, 21 Jun 2016 07:32:57 +0000 (15:32 +0800)]
arm64: mm: remove page_mapping check in __sync_icache_dcache

__sync_icache_dcache unconditionally skips the cache maintenance for
anonymous pages, under the assumption that flushing is only required in
the presence of D-side aliases [see 7249b79f6b4cc ("arm64: Do not flush
the D-cache for anonymous pages")].

Unfortunately, this breaks migration of anonymous pages holding
self-modifying code, where userspace cannot be reasonably expected to
reissue maintenance instructions in response to a migration.

This patch fixes the problem by removing the broken page_mapping(page)
check from the cache syncing code, otherwise we may end up fetching and
executing stale instructions from the PoU.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
7 years agoarm64: fix boot image dependencies to not generate invalid images
Masahiro Yamada [Tue, 21 Jun 2016 01:44:00 +0000 (10:44 +0900)]
arm64: fix boot image dependencies to not generate invalid images

I fixed boot image dependencies for arch/arm in commit 3939f3345050
("ARM: 8418/1: add boot image dependencies to not generate invalid
images").

I see a similar problem for arch/arm64; "make -jN Image Image.gz"
would sometimes end up generating bad images where N > 1.

Fix the dependency in arch/arm64/Makefile to avoid the race
between "make Image" and "make Image.*".

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
7 years agoarm64: update ASID limit
Jean-Philippe Brucker [Fri, 17 Jun 2016 17:33:00 +0000 (18:33 +0100)]
arm64: update ASID limit

During a rollover, we mark the active ASID on each CPU as reserved, before
allocating a new ID for the task that caused the rollover. This means that
with N CPUs, we can only guarantee the new task to obtain a valid ASID if
we have at least N+1 ASIDs. Update this limit in the initcall check.

Note that this restriction was introduced by commit 8e648066 on the
arch/arm side, which disallow re-using the previously active ASID on the
local CPU, as it would introduce a TLB race.

In addition, we only dispose of NUM_USER_ASIDS-1, since ASID 0 is
reserved. Add this restriction as well.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
7 years agodrm/i915/fbc: Disable on HSW by default for now
Lyude [Thu, 9 Jun 2016 15:58:15 +0000 (11:58 -0400)]
drm/i915/fbc: Disable on HSW by default for now

>From https://bugs.freedesktop.org/show_bug.cgi?id=96461 :

This was kind of a difficult bug to track down. If you're using a
Haswell system running GNOME and you have fbc completely enabled and
working, playing videos can result in video artifacts. Steps to
reproduce:

- Run GNOME
- Ensure FBC is enabled and active
- Download a movie, I used the ogg version of Big Buck Bunny for this
- Run `gst-launch-1.0 filesrc location='some_movie.ogg' ! decodebin !
  glimagesink` in a terminal
- Watch for about over a minute, you'll see small horizontal lines go
  down the screen.

For the time being, disable FBC for Haswell by default.

Stefan Richter reported kernel freezes (no video artifacts) when fbc
is on.  (E3-1245 v3 with HD P4600; openbox and some KDE and LXDE
applications, thread begins at https://lkml.org/lkml/2016/4/26/813).
We also got reports from Steven Honeyman on openbox+roxterm.

v2 (From Paulo):
  - Add extra information to the commit message
  - Add Fixes tag
  - Rebase

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96461
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96464
Fixes: a98ee79317b4 ("drm/i915/fbc: enable FBC by default on HSW and BDW")
Cc: stable@vger.kernel.org
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465487895-7401-1-git-send-email-cpaul@redhat.com
(cherry picked from commit c7f7e2feffb0294302041507dfd5fc15f01afccc)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
7 years agodrm/i915: Revert DisplayPort fast link training feature
Mika Kahola [Mon, 20 Jun 2016 08:10:26 +0000 (11:10 +0300)]
drm/i915: Revert DisplayPort fast link training feature

It has been found out that in some HW combination the DisplayPort
fast link training feature caused screen flickering. Let's revert
this feature for now until we can ensure that the feature works for
all platforms.

This is a manual revert of commits 5fa836a9d859 ("drm/i915: DP link
training optimization") and 4e96c97742f4 ("drm/i915: eDP link training
optimization").

Fixes: 5fa836a9d859 ("drm/i915: DP link training optimization")
Fixes: 4e96c97742f4 ("drm/i915: eDP link training optimization")
Cc: <stable@vger.kernel.org> # v4.2+
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91393
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466410226-19543-1-git-send-email-mika.kahola@intel.com
(cherry picked from commit 91df09d92ad82c8778ca218097bf827f154292ca)

7 years agodrm/amd/powerplay: enable clock stretch feature for polaris
Rex Zhu [Tue, 7 Jun 2016 10:39:06 +0000 (18:39 +0800)]
drm/amd/powerplay: enable clock stretch feature for polaris

Power saving feature which reduces the amount of
voltage needed for specific engine clocks.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amdgpu/gfx8: update golden setting for polaris10
Rex Zhu [Tue, 7 Jun 2016 06:09:56 +0000 (14:09 +0800)]
drm/amdgpu/gfx8: update golden setting for polaris10

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powerplay: enable avfs feature for polaris
Rex Zhu [Wed, 8 Jun 2016 11:39:42 +0000 (19:39 +0800)]
drm/amd/powerplay: enable avfs feature for polaris

avfs feature is for voltage control based on
gpu system clock on polaris10

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amdgpu/atombios: add avfs struct for Polaris10/11
Rex Zhu [Wed, 8 Jun 2016 11:17:31 +0000 (19:17 +0800)]
drm/amdgpu/atombios: add avfs struct for Polaris10/11

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powerplay: add avfs related define for polaris
Rex Zhu [Tue, 7 Jun 2016 10:38:39 +0000 (18:38 +0800)]
drm/amd/powerplay: add avfs related define for polaris

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powrplay: enable stutter_mode for polaris.
Rex Zhu [Wed, 8 Jun 2016 11:42:48 +0000 (19:42 +0800)]
drm/amd/powrplay: enable stutter_mode for polaris.

To minimize the dram power expenditure during static -screen

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powerplay: disable UVD SMU handshake for MCLK.
Rex Zhu [Wed, 8 Jun 2016 11:41:00 +0000 (19:41 +0800)]
drm/amd/powerplay: disable UVD SMU handshake for MCLK.

sync up with internal programming recommendations.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powerplay: initialize variables which were missed.
Rex Zhu [Mon, 13 Jun 2016 09:46:31 +0000 (17:46 +0800)]
drm/amd/powerplay: initialize variables which were missed.

Missing pcie dpm settings.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ken Wang <Qingqing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powerplay: enable PowerContainment feature for polaris10/11.
Rex Zhu [Wed, 11 May 2016 09:04:07 +0000 (17:04 +0800)]
drm/amd/powerplay: enable PowerContainment feature for polaris10/11.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amd/powerplay: need to notify system bios pcie device ready
Rex Zhu [Tue, 14 Jun 2016 10:36:36 +0000 (18:36 +0800)]
drm/amd/powerplay: need to notify system bios pcie device ready

before request performance state.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ken Wang <Qingqing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
7 years agodrm/amd/powerplay: fix bug that function parameter was incorect.
Rex Zhu [Mon, 13 Jun 2016 09:39:19 +0000 (17:39 +0800)]
drm/amd/powerplay: fix bug that function parameter was incorect.

Wrong value passed to acpi_pcie_perf_request.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ken Wang <Qingqing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
7 years agodrm/amd/powerplay: fix logic error.
Rex Zhu [Fri, 17 Jun 2016 10:21:01 +0000 (18:21 +0800)]
drm/amd/powerplay: fix logic error.

the error lead powerplay can't get display info in DGPU case.
store_cc6_data just implement in APU.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
7 years agodrm: atmel-hlcdc: Fix OF graph parsing
Boris Brezillon [Fri, 3 Jun 2016 07:17:36 +0000 (09:17 +0200)]
drm: atmel-hlcdc: Fix OF graph parsing

atmel_hlcdc_create_outputs() iterates over OF graph nodes and releases
the node (using of_node_put()) after each iteration, which is wrong
since for_each_endpoint_of_node() is already taking care of that.

Move the of_node_put() call in the error path.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Fixes: 17a8e03e7e97 ("drm: atmel-hlcdc: rework the output code to support drm bridges")

7 years agodrm: atmel-hlcdc: actually disable scaling when no scaling is required
Boris Brezillon [Fri, 27 May 2016 14:09:25 +0000 (16:09 +0200)]
drm: atmel-hlcdc: actually disable scaling when no scaling is required

The driver is only enabling scaling, but never disabling it, thus, if you
enable the scaling feature once it stays enabled forever.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Alex Vazquez <avazquez.dev@gmail.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Fixes: 1a396789f65a ("drm: add Atmel HLCDC Display Controller support")
Cc: <stable@vger.kernel.org>
7 years agodrm/amdgpu: initialize amdgpu_cgs_acpi_eval_object result value
Nicolas Iooss [Sat, 18 Jun 2016 20:55:00 +0000 (22:55 +0200)]
drm/amdgpu: initialize amdgpu_cgs_acpi_eval_object result value

amdgpu_cgs_acpi_eval_object() returned the value of variable "result"
without initializing it first.

This bug has been found by compiling the kernel with clang.  The
compiler complained:

    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:972:14: error: variable
    'result' is used uninitialized whenever 'for' loop exits because its
    condition is false [-Werror,-Wsometimes-uninitialized]
            for (i = 0; i < count; i++) {
                        ^~~~~~~~~
    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:1011:9: note: uninitialized
    use occurs here
            return result;
                   ^~~~~~
    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:972:14: note: remove the
    condition if it is always true
            for (i = 0; i < count; i++) {
                        ^~~~~~~~~
    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:864:12: note: initialize the
    variable 'result' to silence this warning
            int result;
                      ^
                       = 0

Fixes: 3f1d35a03b3c ("drm/amdgpu: implement new cgs interface for acpi
function")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agodrm/amdgpu: precedence bug in amdgpu_device_init()
Dan Carpenter [Sat, 18 Jun 2016 08:38:44 +0000 (11:38 +0300)]
drm/amdgpu: precedence bug in amdgpu_device_init()

! has higher precedence than bitwise & so we need to add parenthesis
for this to work as intended.

Fixes: 048765ad5af7 ('amdgpu: fix asic initialization for virtualized environments (v2)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
7 years agoPCI: Fix unaligned accesses in VC code
David Miller [Sun, 19 Jun 2016 06:52:25 +0000 (23:52 -0700)]
PCI: Fix unaligned accesses in VC code

The save/restore buffers for VC state is first composed of a 2-byte control
register, then a bunch of 4-byte words.

This causes unaligned accesses which trap on platform such as sparc.

This is easy to fix by simply moving the buffer pointer forward by 4 bytes
instead of 2 after dealing with the control register.  The length
adjustment needs to be changed likewise as well.

Fixes: 5f8fc43217a0 ("PCI: Include pci/pcie/Kconfig directly from pci/Kconfig")
Reported-by: Meelis Roos <mroos@linux.ee>
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v4.6+
7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Mon, 20 Jun 2016 17:41:51 +0000 (10:41 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "A couple more of d_walk()/d_subdirs reordering fixes (stable fodder;
  ought to solve that crap for good) and a fix for a brown paperbag bug
  in d_alloc_parallel() (this cycle)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix idiotic braino in d_alloc_parallel()
  autofs races
  much milder d_walk() race

7 years agoMerge tag 'trace-v4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Mon, 20 Jun 2016 17:35:48 +0000 (10:35 -0700)]
Merge tag 'trace-v4.7-rc3' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Two fixes for the tracing system:

   - When trace_printk() is used with a non constant format descriptor,
     it adds a NULL pointer into the trace format section, and the code
     isn't prepared to deal with it.  This bug appeared by a change that
     was added in v3.5.

   - The ftracetest (selftests section) can't handle testing histograms
     when histograms are not configured.  Currently it shows that they
     fail the test, when they should state that they are unsupported.
     This bug was added in the 4.7 merge window with the addition of the
     historgram code"

* tag 'trace-v4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftracetest: Fix hist unsupported result in hist selftests
  tracing: Handle NULL formats in hold_module_trace_bprintk_format()

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Mon, 20 Jun 2016 17:18:58 +0000 (10:18 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "Two more bugs fixes for 4.7:

   - a KVM regression introduced with the pgtable.c code split

   - a perf issue with two hardware PMUs using a shared event context"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cpum_cf: use perf software context for hardware counters
  KVM: s390/mm: Fix CMMA reset during reboot

7 years agoMerge tag 'hwmon-for-linus-v4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 20 Jun 2016 17:04:12 +0000 (10:04 -0700)]
Merge tag 'hwmon-for-linus-v4.7-rc4' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
 "Two stability fixes plus a security fix for the dell-smm driver"

* tag 'hwmon-for-linus-v4.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (dell-smm) Disallow fan_type() calls on broken machines
  hwmon: (dell-smm) Restrict fan control and serial number to CAP_SYS_ADMIN by default
  hwmon: (dell-smm) Fail in ioctl I8K_BIOS_VERSION when bios version is not a number

7 years agofix idiotic braino in d_alloc_parallel()
Al Viro [Mon, 20 Jun 2016 05:35:59 +0000 (01:35 -0400)]
fix idiotic braino in d_alloc_parallel()

Check for d_unhashed() while searching in in-lookup hash was absolutely
wrong.  Worse, it masked a deadlock on dget() done under bitlock that
nests inside ->d_lock.  Thanks to J. R. Okajima for spotting it.

Spotted-by: "J. R. Okajima" <hooanon05g@gmail.com>
Wearing-brown-paperbag: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
7 years agoftracetest: Fix hist unsupported result in hist selftests
Steven Rostedt (Red Hat) [Mon, 23 May 2016 19:06:30 +0000 (15:06 -0400)]
ftracetest: Fix hist unsupported result in hist selftests

When histograms are not configured in the kernel, the ftracetest histogram
selftests should return "unsupported" and not "Failed". To detect this, the
test scripts have:

 FEATURE=`grep hist events/sched/sched_process_fork/trigger`
 if [ -z "$FEATURE" ]; then
     echo "hist trigger is not supported"
     exit_unsupported
 fi

The problem is that '-e' is in effect and any error will cause the program
to terminate. The grep for 'hist' fails, because it is not compiled it (thus
unsupported), but because grep has an error code for failing to find the
string, it causes the program to terminate, and is marked as a failed test.

Namhyung Kim recommended to test for the "hist" file located in
events/sched/sched_process_fork/hist instead, as it is more inline with the
other checks. As the hist file is only created if the histogram feature is
enabled, that is a valid check.

Link: http://lkml.kernel.org/r/20160523151538.4ea9ce0c@gandalf.local.home
Suggested-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 76929ab51f0ee ("kselftests/ftrace: Add hist trigger testcases")
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
7 years agotracing: Handle NULL formats in hold_module_trace_bprintk_format()
Steven Rostedt (Red Hat) [Fri, 17 Jun 2016 20:10:42 +0000 (16:10 -0400)]
tracing: Handle NULL formats in hold_module_trace_bprintk_format()

If a task uses a non constant string for the format parameter in
trace_printk(), then the trace_printk_fmt variable is set to NULL. This
variable is then saved in the __trace_printk_fmt section.

The function hold_module_trace_bprintk_format() checks to see if duplicate
formats are used by modules, and reuses them if so (saves them to the list
if it is new). But this function calls lookup_format() that does a strcmp()
to the value (which is now NULL) and can cause a kernel oops.

This wasn't an issue till 3debb0a9ddb ("tracing: Fix trace_printk() to print
when not using bprintk()") which added "__used" to the trace_printk_fmt
variable, and before that, the kernel simply optimized it out (no NULL value
was saved).

The fix is simply to handle the NULL pointer in lookup_format() and have the
caller ignore the value if it was NULL.

Link: http://lkml.kernel.org/r/1464769870-18344-1-git-send-email-zhengjun.xing@intel.com
Reported-by: xingzhen <zhengjun.xing@intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Fixes: 3debb0a9ddb ("tracing: Fix trace_printk() to print when not using bprintk()")
Cc: stable@vger.kernel.org # v3.5+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
7 years agoLinux 4.7-rc4 v4.7-rc4
Linus Torvalds [Mon, 20 Jun 2016 04:30:02 +0000 (21:30 -0700)]
Linux 4.7-rc4

7 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Linus Torvalds [Sun, 19 Jun 2016 17:05:14 +0000 (07:05 -1000)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs

Pull UDF fixes and a reiserfs fix from Jan Kara:
 "A couple of udf fixes (most notably a bug in parsing UDF partitions
  which led to inability to mount recent Windows installation media) and
  a reiserfs fix for handling kstrdup failure"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  reiserfs: check kstrdup failure
  udf: Use correct partition reference number for metadata
  udf: Use IS_ERR when loading metadata mirror file entry
  udf: Don't BUG on missing metadata partition descriptor

7 years agoMerge tag 'dmaengine-fix-4.7-rc4' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Sun, 19 Jun 2016 16:52:20 +0000 (06:52 -1000)]
Merge tag 'dmaengine-fix-4.7-rc4' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "Some fixes has piled up, so time to send them upstream.

  These fixes include:
   - at_xdmac fixes for residue and other stuff
   - update MAINTAINERS for dma dt bindings
   - mv_xor fix for incorrect offset"

* tag 'dmaengine-fix-4.7-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: mv_xor: Fix incorrect offset in dma_map_page()
  dmaengine: at_xdmac: double FIFO flush needed to compute residue
  dmaengine: at_xdmac: fix residue corruption
  dmaengine: at_xdmac: align descriptors on 64 bits
  MAINTAINERS: Add file patterns for dma device tree bindings

7 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Sun, 19 Jun 2016 06:36:17 +0000 (20:36 -1000)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "Another batch of fixes for ARM SoC platforms.  Most are smaller fixes.

  Two areas that are worth pointing out are:

   - OMAP had a handful of changes to voltage specs that caused a bit of
     churn, most of volume of change in this branch is due to this.

   - There are a couple of _rcuidle fixes from Paul that touch common
     code and came in through the OMAP tree since they were the ones who
     saw the problems.

 The rest is smaller changes across a handful of platforms"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (36 commits)
  ARM: dts: STi: stih407-family: Disable reserved-memory co-processor nodes
  ARM: dts: am437x-sk-evm: Reduce i2c0 bus speed for tps65218
  ARM: OMAP2+: timer: add probe for clocksources
  ARM: OMAP1: fix ams-delta FIQ handler to work with sparse IRQ
  memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing
  arm: Use _rcuidle for smp_cross_call() tracepoints
  MAINTAINERS: Add myself as reviewer of ARM FSL/NXP
  ARM: OMAP: DRA7: powerdomain data: Remove unused pwrsts_mem_ret
  ARM: OMAP: DRA7: powerdomain data: Remove unused pwrsts_logic_ret
  ARM: OMAP: DRA7: powerdomain data: Set L3init and L4per to ON
  ARM: imx6ul: Fix Micrel PHY mask
  ARM: OMAP2+: Select OMAP_INTERCONNECT for SOC_AM43XX
  ARM: dts: DRA74x: fix DSS PLL2 addresses
  ARM: OMAP2: Enable Errata 430973 for OMAP3
  ARM: dts: socfpga: Add missing PHY phandle
  ARM: dts: exynos: Fix port nodes names for Exynos5420 Peach Pit board
  ARM: dts: exynos: Fix port nodes names for Exynos5250 Snow board
  ARM: dts: sun6i: yones-toptech-bs1078-v2: Drop constraints on dc1sw regulator
  ARM: dts: sun6i: primo81: Drop constraints on dc1sw regulator
  ARM: dts: sunxi: Add OLinuXino Lime2 eMMC to the Makefile
  ...

7 years agoMerge tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux into fixes
Olof Johansson [Sun, 19 Jun 2016 05:59:07 +0000 (22:59 -0700)]
Merge tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux into fixes

OMAP-GPMC: Fixes for for v4.7-rc cycle:

- Fix omap gpmc EXTRADELAY timing. The DT provided timings
were wrongly used causing devices requiring extra delay timing
to fail.

* tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux:
  memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing
  + Linux 4.7-rc3

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'omap-for-v4.7/fixes-powedomain' of git://git.kernel.org/pub/scm/linux...
Olof Johansson [Sun, 19 Jun 2016 05:57:48 +0000 (22:57 -0700)]
Merge tag 'omap-for-v4.7/fixes-powedomain' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

Fixes for omaps for v4.7-rc cycle:

- Fix dra7 for hardware issues limiting L4Per and L3init power domains
  to on state. Without this the devices may not work correctly after
  some time of use because of asymmetric aging. And related to this,
  let's also remove the unusable states.

- Always select omap interconnect for am43x as otherwise the am43x
  only configurations will not boot properly. This can happen easily
  for any product kernels that leave out other SoCs to save memory.

- Fix DSS PLL2 addresses that have gone unused for now

- Select erratum 430973 for omap3, this is now safe to do and can
  save quite a bit of debugging time for people who may have left
  it out.

* tag 'omap-for-v4.7/fixes-powedomain' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP: DRA7: powerdomain data: Remove unused pwrsts_mem_ret
  ARM: OMAP: DRA7: powerdomain data: Remove unused pwrsts_logic_ret
  ARM: OMAP: DRA7: powerdomain data: Set L3init and L4per to ON
  ARM: OMAP2+: Select OMAP_INTERCONNECT for SOC_AM43XX
  ARM: dts: DRA74x: fix DSS PLL2 addresses
  ARM: OMAP2: Enable Errata 430973 for OMAP3
  + Linux 4.7-rc2

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agodrm/exynos: use logical AND in exynos_drm_plane_check_size()
Tobias Jakobi [Wed, 25 May 2016 12:30:07 +0000 (14:30 +0200)]
drm/exynos: use logical AND in exynos_drm_plane_check_size()

The current bitwise AND should result in the same assembler
but this is what the code is actually supposed to do.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
7 years agodrm/exynos: remove superfluous inclusions of fbdev header
Tobias Jakobi [Wed, 25 May 2016 12:35:41 +0000 (14:35 +0200)]
drm/exynos: remove superfluous inclusions of fbdev header

Neither of these files issue any fbdev related calls.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
7 years agodrm/exynos: g2d: drop the _REG postfix from the stride defines
Tobias Jakobi [Wed, 25 May 2016 12:42:56 +0000 (14:42 +0200)]
drm/exynos: g2d: drop the _REG postfix from the stride defines

This makes the defines consistent with the rest.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
7 years agodrm/exynos: don't use HW trigger for Exynos5420/5422/5800
Javier Martinez Canillas [Thu, 2 Jun 2016 14:20:10 +0000 (10:20 -0400)]
drm/exynos: don't use HW trigger for Exynos5420/5422/5800

Commit a6f75aa161c5 ("drm/exynos: fimd: add HW trigger support") added
hardware trigger support to the FIMD controller driver. But this broke
the display in at least the Exynos5800 Peach Pi Chromebook.

So until the issue is fixed, avoid using HW trigger for the Exynos5420
based boards and use SW trigger as it was before the mentioned commit.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
7 years agodrm/exynos: fimd: don't set .has_hw_trigger in s3c6400 driver data
Javier Martinez Canillas [Tue, 31 May 2016 00:20:22 +0000 (20:20 -0400)]
drm/exynos: fimd: don't set .has_hw_trigger in s3c6400 driver data

The field value is only checked in fimd_setup_trigger() if .trg_type is
I80_HW_TRG so there's no point in setting this field for the s3c6400 if
is never going to be used since .trg_type is not set.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
7 years agodrm/exynos: dp: Fix NULL pointer dereference due uninitialized connector
Yakir Yang [Wed, 8 Jun 2016 14:13:27 +0000 (10:13 -0400)]
drm/exynos: dp: Fix NULL pointer dereference due uninitialized connector

Commit 3424e3a4f844 ("drm: bridge: analogix/dp: split exynos dp driver to
bridge directory") split the Exynos DP core driver into a core driver and
a bridge driver for the Analogix chip since that is also used by Rockchip.

But the change introduced a regression causing a NULL pointer dereference
when trying to access an uninitialized connector in the driver .get_modes:

Fix this by instead of having a connector struct for both the Exynos and
Analogix drivers, just use the connector initialized in the bridge driver.

Fixes: 3424e3a4f844 ("drm: bridge: analogix/dp: split exynos dp driver to bridge directory")

Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
7 years agoMerge tag 'fixes-rcu-fiq-signed' of git://git.kernel.org/pub/scm/linux/kernel/git...
Olof Johansson [Sun, 19 Jun 2016 05:21:52 +0000 (22:21 -0700)]
Merge tag 'fixes-rcu-fiq-signed' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

Fixes for omaps for v4.7-rc cycle:

- Two boot warning fixes from the RCU tree that should have gotten
  merged several weeks ago already but did not because of issues
  with who merges them. Paul has now split the RCU warning fixes into
  sets for various maintainers.

- Fix ams-delta FIQ regression caused by omap1 sparse IRQ changes

- Fix PM for omap3 boards using timer12 and gptimer, like the
  original beagleboard

- Fix hangs on am437x-sk-evm by lowering the I2C bus speed

* tag 'fixes-rcu-fiq-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: am437x-sk-evm: Reduce i2c0 bus speed for tps65218
  ARM: OMAP2+: timer: add probe for clocksources
  ARM: OMAP1: fix ams-delta FIQ handler to work with sparse IRQ
  arm: Use _rcuidle for smp_cross_call() tracepoints
  arm: Use _rcuidle tracepoint to allow use from idle

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoARM: dts: STi: stih407-family: Disable reserved-memory co-processor nodes
Lee Jones [Fri, 17 Jun 2016 11:44:18 +0000 (13:44 +0200)]
ARM: dts: STi: stih407-family: Disable reserved-memory co-processor nodes

This patch fixes a non-booting issue in Mainline.

When booting with a compressed kernel, we need to be careful how we
populate memory close to DDR start.  AUTO_ZRELADDR is enabled by default
in multi-arch enabled configurations, which place some restrictions on
where the kernel is placed and where it will be uncompressed to on boot.

AUTO_ZRELADDR takes the decompressor code's start address and masks out
the bottom 28 bits to obtain an address to uncompress the kernel to
(thus a load address of 0x42000000 means that the kernel will be
uncompressed to 0x40000000 i.e. DDR START on this platform).

Even changing the load address to after the co-processor's shared memory
won't render a booting platform, since the AUTO_ZRELADDR algorithm still
ensures the kernel is uncompressed into memory shared with the first
co-processor (0x40000000).

Another option would be to move loading to 0x4A000000, since this will
mean the decompressor will decompress the kernel to 0x48000000. However,
this would mean a large chunk (0x44000000 => 0x48000000 (64MB)) of
memory would essentially be wasted for no good reason.

Until we can work with ST to find a suitable memory location to
relocate co-processor shared memory, let's disable the shared memory
nodes.  This will ensure a working platform in the mean time.

NB: The more observant of you will notice that we're leaving the DMU
shared memory node enabled; this is because a) it is the only one in
active use at the time of this writing and b) it is not affected by
the current default behaviour which is causing issues.

Fixes: fe135c6 (ARM: dts: STiH407: Move over to using the 'reserved-memory' API for obtaining DMA memory)
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'imx-fixes-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...
Olof Johansson [Sun, 19 Jun 2016 05:18:45 +0000 (22:18 -0700)]
Merge tag 'imx-fixes-4.7' of git://git./linux/kernel/git/shawnguo/linux into fixes

The i.MX fixes for 4.7:
 - Correct Micrel PHY mask to fix the issue that i.MX6UL ethernet works
   in U-Boot but not in kernel.

* tag 'imx-fixes-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: imx6ul: Fix Micrel PHY mask

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 19 Jun 2016 01:20:15 +0000 (15:20 -1000)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "A couple of fixes for pmd_mknotpresent()/pmd_present() for LPAE
  systems"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8579/1: mm: Fix definition of pmd_mknotpresent
  ARM: 8578/1: mm: ensure pmd_present only checks the valid bit

7 years agohwmon: (dell-smm) Disallow fan_type() calls on broken machines
Pali Rohár [Fri, 17 Jun 2016 22:54:46 +0000 (00:54 +0200)]
hwmon: (dell-smm) Disallow fan_type() calls on broken machines

Some Dell machines have especially broken SMM or BIOS which cause that once
fan_type() is called then CPU fan speed going randomly up and down. And for
fixing this behaviour reboot is required.

So this patch creates fan_type blacklist of affected Dell machines and
disallow fan_type() call on them to prevent that erratic behaviour.

Old blacklist which disabled loading driver on some machines added in
commits a4b45b25f18d ("hwmon: (dell-smm) Blacklist Dell Studio XPS 8100")
and 6220f4ebd7b4 ("hwmon: (dell-smm) Blacklist Dell Studio XPS 8000") were
moved to FAN_TYPE blacklist.

Reported-by: Jan C Peters <jcpeters89@gmail.com>
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=100121
Cc: stable@vger.kernel.org # v4.0+, will need backport
Signed-off-by: Guenter Roeck <linux@roeck-us.net>