Pull drm fixes from Dave Airlie:
 "Nothing too scary, we have one outstanding i915 regression but Daniel
  has promised the fix as soon as he's finished testing it a bit.

  Fixes for the main x86 drivers:
   - radeon: dpm fixes, displayport regression fix
   - i915: quirks for backlight regression, edp reboot fix, valleyview
     black screen fixes
   - nouveau: display port regression fixes, fix for memory reclocking"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon/dpm: Reenabling SS on Cayman
  drm/radeon: fix typo in ci_stop_dpm()
  drm/radeon: fix typo in golden register setup on evergreen
  drm/radeon: only print meaningful VM faults
  drm/radeon/dp: return -EIO for flags not zero case
  drm/i915/vlv: T12 eDP panel timing enforcement during reboot
  drm/i915: Only unbind vgacon, not other console drivers
  drm/i915: Don't clobber the GTT when it's within stolen memory
  drm/i915/vlv: Update the DSI ULPS entry/exit sequence
  drm/i915/vlv: DPI FIFO empty check is not needed
  drm/i915: Toshiba CB35 has a controllable backlight
  drm/i915: Acer C720 and C720P have controllable backlights
  drm/i915: quirk asserts controllable backlight presence, overriding VBT
  drm/nouveau/ram: fix test for gpio presence
  drm/nouveau/dp: workaround broken display
  drm/nouveau/dp: fix required link bandwidth calculations
  drm/nouveau/kms: restore fbcon after display has been resumed
  drm/nv50-/kms: pass a non-zero value for head to sor dpms methods
  drm/nouveau/fb: Prevent inlining of ramfuc_reg
  drm/gk104/ram: bash mpll bit 31 on

Pull kbuild fixes from Michal Marek:
 "Three more fixes for the relative build dir feature:

   - Shut up make -s again
   - Fix for rpm/deb/tar-pkg with O=<subdir>
   - Fix for CONFIG_EXTRA_FIRMWARE"

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  firmware: Create directories for external firmware
  kbuild: Fix packaging targets with relative $(srctree)
  kbuild: Do not print the build directory with make -s

Pull ACPI and power management fixes from Rafael Wysocki:
 "These are a few regression fixes for ACPI device enumeration and
  resources management, intel_pstate and cpufreq, a revert of an ACPI
  commit removing user space interfaces in /proc that we incorrectly
  thought were not used any more, fixes for some long-standing
  concurrency issues in the ACPI EC driver, two ACPI battery driver
  fixes, stable-candidate fixes for intel_pstate, an ACPI-related fix
  for i915 and two new ACPI video blacklist entries for Win8-oriented
  BIOSes.

  Specifics:

   - Missing device ID for ACPI enumeration of PNP devices that we
     overlooked during the recent rework of that code from Zhang Rui.

   - Fix for a problem introduced during the 3.14 cycle in the ACPI
     device resources management code and causing it to reject all
     resources of length 0 although some of them are actually valid
     which affects serial ports detection on a number of systems.  From
     Andy Whitcroft.

   - intel_pstate fix for a boot problem on some BayTrail-based systems
     introduced by a previous fix related to that platform during the
     3.13 cycle from Dirk Brandewie.

   - Revert of a 3.13 commit that removed the ACPI AC /proc interface
     which turns out to be still needed by some old utilities
     (kpowersave from kde 3.5.10 in particular) from Lan Tianyu.

   - cpufreq build fix for the davinci ARM platform from Prabhakar Lad
     (the breakage was introduced during the 3.10 cycle).

   - ACPI-related i915 fix preventing firmware on some Thinkpad laptops
     from setting backlight levels incorrectly during AC plug/unplug.
     From Aaron Lu.

   - Fixes for two nasty race conditions in the ACPI embedded controller
     driver that may be responsible for a number of past bug reports
     related to the EC from Lv Zhang and a fix for two memory leaks in
     error code paths in that driver from Colin Ian King.

   - Fixes for a couple of corner-case issues in the intel_pstate driver
     (all candidates for -stable) from Dirk Brandewie and Vincent Minet.

   - Fixes for two corner-case issues in the ACPI battery driver from
     Josef Gajdusek and Lan Tianyu.

   - Two new ACPI video blacklist entries for Acer TravelMate B113 and
     Dell Inspiron 5737 from Edward Lin and Martin Kepplinger"

* tag 'pm+acpi-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / PNP: add soc_button_array device ID to PNP IDs list
  cpufreq: Makefile: fix compilation for davinci platform
  ACPI / video: Add Acer TravelMate B113 to native backlight blacklist
  ACPI / video: Add Dell Inspiron 5737 to the blacklist
  ACPI / i915: ignore firmware requests for backlight change
  ACPI / battery: fix wrong value of capacity_now reported when fully charged
  ACPI / resources: only reject zero length resources based at address zero
  ACPI / battery: Retry to get battery information if failed during probing
  ACPI / EC: Free saved_ec on error exit path
  ACPI / EC: Add detailed fields debugging support of EC_SC(R).
  ACPI / EC: Update revision due to recent changes
  ACPI / EC: Fix race condition in ec_transaction_completed()
  ACPI / EC: Remove duplicated ec_wait_ibf0() waiter
  ACPI / EC: Add asynchronous command byte write support
  ACPI / EC: Avoid race condition related to advance_transaction()
  intel_pstate: Set CPU number before accessing MSRs
  intel_pstate: Update documentation of {max,min}_perf_pct sysfs files
  intel_pstate: don't touch turbo bit if turbo disabled or unavailable.
  intel_pstate: Fix setting VID
  Revert "ACPI / AC: Remove AC's proc directory."

This new request drops the pageflipping fixes for now.  Just a few small
fixes for dpm, DP, and a fix for a hang on boot evergreen.

* 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon/dpm: Reenabling SS on Cayman
  drm/radeon: fix typo in ci_stop_dpm()
  drm/radeon: fix typo in golden register setup on evergreen
  drm/radeon: only print meaningful VM faults
  drm/radeon/dp: return -EIO for flags not zero case

It reverts commit c745fe61 now that
Cayman is stable since VDDCI fix. Spread spectrum was not the culprit.

This depends on b0880e87
(drm/radeon/dpm: fix vddci setup typo on cayman).

Signed-off-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Need to use the RREG32_SMC() accessor since the register
is an smc indirect index.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Fixes hangs on driver load on some cards.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76998



Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

If there are error flags in the aux transaction return
-EIO rather than -EBUSY.  -EIO restarts the whole transaction
while -EBUSY jus retries.  Fixes problematic aux transfers.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=80684



Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

* pm-cpufreq:
  cpufreq: Makefile: fix compilation for davinci platform
  intel_pstate: Set CPU number before accessing MSRs
  intel_pstate: Update documentation of {max,min}_perf_pct sysfs files
  intel_pstate: don't touch turbo bit if turbo disabled or unavailable.
  intel_pstate: Fix setting VID

* acpi-video:
  ACPI / video: Add Acer TravelMate B113 to native backlight blacklist
  ACPI / video: Add Dell Inspiron 5737 to the blacklist
  ACPI / i915: ignore firmware requests for backlight change

* acpi-ec:
  ACPI / EC: Free saved_ec on error exit path
  ACPI / EC: Add detailed fields debugging support of EC_SC(R).
  ACPI / EC: Update revision due to recent changes
  ACPI / EC: Fix race condition in ec_transaction_completed()
  ACPI / EC: Remove duplicated ec_wait_ibf0() waiter
  ACPI / EC: Add asynchronous command byte write support
  ACPI / EC: Avoid race condition related to advance_transaction()

* acpi-resources:
  ACPI / resources: only reject zero length resources based at address zero

* acpi-ac:
  Revert "ACPI / AC: Remove AC's proc directory."

* acpi-scan:
  ACPI / PNP: add soc_button_array device ID to PNP IDs list

* acpi-battery:
  ACPI / battery: fix wrong value of capacity_now reported when fully charged
  ACPI / battery: Retry to get battery information if failed during probing

Pull libata fixes from Tejun Heo:
 "Nothing too interesting.  All fixes are ahci_platform related"

* 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ahci_xgene: fix the dma state machine lockup for the IDENTIFY DEVICE PIO mode command.
  libahci: export ahci_qc_issue() and ahci_start_fix_rx()
  ata: ahci_imx: warn when disabling ahci link
  ahci: disable ncq feature for hisilicon sata
  ahci: imx: manage only sata_ref_clk in imx_sata_enable[disable]
  libahci_platform: Fail when PHY required but PHY support disabled

Pull cgroup fixes from Tejun Heo:
 "Mostly fixes for the fallouts from the recent cgroup core changes.

  The decoupled nature of cgroup dynamic hierarchy management
  (hierarchies are created dynamically on mount but may or may not be
  reused once unmounted depending on remaining usages) led to more
  ugliness being added to kernfs.

  Hopefully, this is the last of it"

* 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cpuset: break kernfs active protection in cpuset_write_resmask()
  cgroup: fix a race between cgroup_mount() and cgroup_kill_sb()
  kernfs: introduce kernfs_pin_sb()
  cgroup: fix mount failure in a corner case
  cpuset,mempolicy: fix sleeping function called from invalid context
  cgroup: fix broken css_has_online_children()

Pull workqueue fixes from Tejun Heo:
 "Two workqueue fixes.  Both are one liners.  One fixes missing uevent
  for workqueue files on sysfs.  The other one fixes missing zeroing of
  NUMA cpu masks which can lead to oopses among other things"

* 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: zero cpumask of wq_numa_possible_cpumask on init
  workqueue: fix dev_set_uevent_suppress() imbalance

Pull percpu fix from Tejun Heo:
 "One patch to fix a typo in percpu section name.  Given how long the
  bug has been there and that there hasn't been any report of brekage,
  it's unlikely to cause actual issues"

* 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  core: fix typo in percpu read_mostly section

Pull i2c build fix and cleanup from Wolfram Sang:
 "One buildfix for the i2c subsystem.  While here, I decided to add the
  header cleanup as well"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: sun6i-p2wi: Remove duplicate inclusion of module.h
  i2c: mux: pca954x: fix dependencies

Pull crypto fixes from Herbert Xu:
 "This push fixes an error in sha512_ssse3 that leads to incorrect
  output as well as a memory leak in caam_jr when the module is
  unloaded"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: caam - fix memleak in caam_jr module
  crypto: sha512_ssse3 - fix byte count to bit count conversion

This patch fixes a memory leak that appears when caam_jr module is unloaded.

Cc: <stable@vger.kernel.org> # 3.13+
Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Fixes for regressions and black screens, cc: stable where applicapable
(the last minute rebase was to sprinkle missing stable tags). A bit more
than what I'd wish for, but excluding vlv and that the first 3 patches are
just quirks for 1 regression it looks much better.

There's still a "oops, lost dithering" issue on older platforms open. I'm
working on a fix for that now but didn't want to delay this pile.

* tag 'drm-intel-fixes-2014-07-09' of git://anongit.freedesktop.org/drm-intel:
  drm/i915/vlv: T12 eDP panel timing enforcement during reboot
  drm/i915: Only unbind vgacon, not other console drivers
  drm/i915: Don't clobber the GTT when it's within stolen memory
  drm/i915/vlv: Update the DSI ULPS entry/exit sequence
  drm/i915/vlv: DPI FIFO empty check is not needed
  drm/i915: Toshiba CB35 has a controllable backlight
  drm/i915: Acer C720 and C720P have controllable backlights
  drm/i915: quirk asserts controllable backlight presence, overriding VBT

Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes

A couple of DP regression fixes, kepler memory reclocking fixes, and a fix for an annoying display issue that can pop up on resume.

* 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau/ram: fix test for gpio presence
  drm/nouveau/dp: workaround broken display
  drm/nouveau/dp: fix required link bandwidth calculations
  drm/nouveau/kms: restore fbcon after display has been resumed
  drm/nv50-/kms: pass a non-zero value for head to sor dpms methods
  drm/nouveau/fb: Prevent inlining of ramfuc_reg
  drm/gk104/ram: bash mpll bit 31 on

Pull PCI fixes from Bjorn Helgaas:
 "Just a fix for the device reset path and an email address update.

  Virtualization
    - Fix "wait for pending transactions" for PCI AF reset (Alex
      Williamson)

  Miscellaneous
    - Update mx6 PCI driver maintainer email (Fabio Estevam)"

* tag 'pci-v3.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  MAINTAINERS: Update mx6 PCI driver maintainer's email
  PCI: Fix unaligned access in AF transaction pending test

Pull f2fs bugfixes from Jaegeuk Kim:
 "This includes a couple of bug fixes found by xfstests.  In addition,
  one critical bug was reported by Brian Chadwick, which is falling into
  the infinite loop in balance_dirty_pages.  And it turned out due to
  the IO merging policy in f2fs, which was newly merged in 3.16.

   - fix normal and recovery path for fallocated regions
   - fix error case mishandling
   - recover renamed fsync inodes correctly
   - fix to get out of infinite loops in balance_dirty_pages
   - fix kernel NULL pointer error"

* tag 'f2fs-fixes-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
  f2fs: avoid to access NULL pointer in issue_flush_thread
  f2fs: check bdi->dirty_exceeded when trying to skip data writes
  f2fs: do checkpoint for the renamed inode
  f2fs: release new entry page correctly in error path of f2fs_rename
  f2fs: fix error path in init_inode_metadata
  f2fs: check lower bound nid value in check_nid_range
  f2fs: remove unused variables in f2fs_sm_info
  f2fs: fix not to allocate unnecessary blocks during fallocate
  f2fs: recover fallocated data and its i_size together
  f2fs: fix to report newly allocate region as extent

Commit 5180d5f4 ("firmware: Simplify directory creation") broke
including firmware specified in CONFIG_EXTRA_FIRMWARE:

  MK_FW   firmware/amd-ucode/microcode_amd.bin.gen.S
/bin/sh: firmware/amd-ucode/microcode_amd.bin.gen.S: No such file or directory
...
firmware/Makefile:185: recipe for target
'firmware/amd-ucode/microcode_amd.bin.gen.S' failed

It works with O= builds, because the directory is created by
Makefile.build. Create the directory in firmware/Makefile in non-O
builds.

Reported-and-tested-by: Ronald Uitermark <ronald645@gmail.com>
Reported-and-tested-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=75861



Denis 2014-05-10 11:28:59 UTC reported:
"F2FS-fs (mmcblk0p28): mounting..
 Unable to handle kernel NULL pointer dereference at virtual address 00000018
 ...
 [<c0a2f678>] (_raw_spin_lock+0x3c/0x70) from [<c03a0330>] (issue_flush_thread+0x50/0x17c)
 [<c03a0330>] (issue_flush_thread+0x50/0x17c) from [<c01b4064>] (kthread+0x98/0xa4)
 [<c01b4064>] (kthread+0x98/0xa4) from [<c0108060>] (kernel_thread_exit+0x0/0x8)"

This patch assign cmd_control_info in sm_info before issue_flush_thread is being
created, so this make sure that issue flush thread will have no chance to access
invalid info in fcc.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

If we don't check the current backing device status, balance_dirty_pages can
fall into infinite pausing routine.

This can be occurred when a lot of directories make a small number of dirty
dentry pages including files.

Reported-by: Brian Chadwick <brianchad@westnet.com.au>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

If an inode is renamed, it should be registered as file_lost_pino to conduct
checkpoint at f2fs_sync_file.
Otherwise, the inode cannot be recovered due to no dent_mark in the following
scenario.

Note that, this scenario is from xfstests/322.

1. create "a"
2. fsync "a"
3. rename "a" to "b"
4. fsync "b"
5. Sudden power-cut

After recovery is done, "b" should be seen.
However, the result shows "a", since the recovery procedure does not enter
recover_dentry due to no dent_mark.

The reason is like below.
- The nid of "a" is checkpointed during #2, f2fs_sync_file.
- The inode page for "b" produced by #3 is written without dent_mark by
sync_node_pages.

So, this patch fixes this bug by assinging file_lost_pino to the "a"'s inode.
If the pino is lost, f2fs_sync_file conducts checkpoint, and then recovers
the latest pino and its dentry information for further recovery.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

This patch correct releasing code of new_page to avoid BUG_ON in error patch of
f2fs_rename.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

If we fail in this path:
->init_inode_metadata
  ->make_empty_dir
    ->get_new_data_page
      ->grab_cache_page return -ENOMEM

We will bug on in error path of init_inode_metadata when call remove_inode_page
because i_block = 2 (one inode block will be released later & one dentry block).

We should release the dentry block in init_inode_metadata to avoid this BUG_ON,
and avoid leak of dentry block resource, because we never have second chance to
release that block in ->evict_inode as in upper error path we make this inode
'bad'.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

This patch add lower bound verification for nid in check_nid_range, so nids
reserved like 0, node, meta passed by caller could be checked there.

And then check_nid_range could be used in f2fs_nfs_get_inode for simplifying
code.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Remove unused variables in struct f2fs_sm_info.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

The soc_button_array PNP driver was introduced in 3.15.
But in commit eec15edb (ACPI / PNP: use device ID list for
PNPACPI device enumeration), when reworking the PNPACPI device
enumeration, we missed the soc_button_array device ID.

This results in a regression in 3.16-rc1 that soc_button_array
pnp device fails to be enumerated.

Fix the problem by adding soc_button_array device ID into the
acpi_pnp scan handler's ID list.

Fixes: eec15edb (ACPI / PNP: use device ID list for PNPACPI device enumeration)
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The panel power sequencer on vlv doesn't appear to accept changes to its
T12 power down duration during warm reboots. This change forces a delay
for warm reboots to the T12 panel timing as defined in the VBT table for
the connected panel.

Ver2: removed redundant pr_crit(), commented magic value for pp_div_reg

Ver3: moved SYS_RESTART check earlier, new name for pp_div.

Ver4: Minor issue changes

Ver5: Move registration of reboot notifier to edp_connector_init,
      Added warning comment to handler about lack of PM notification.

Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

The console subsystem only provides a function to switch to a given
console, but we want to actually only switach away from vgacon.
Unconditionally switching to the dummy console resulted in switching
away from fbcon in multi-gpu setups when other gpu drivers are loaded
before i915.

Then either the reinitialization of fbcon when i915 registers its
fbdev emulation or the teardown of the fbcon driver killed the
machine. So only switch to the dummy console when it's required.

Kudos to Chris for the original idea, I've only refined it a bit to
still unregister vgacon even when it's currently unused.

This regression has been introduced in

commit a4de0526
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jun 5 16:20:46 2014 +0200

    drm/i915: Kick out vga console

Reported-and-tested-by: Ed Tomlinson <edt@aei.ca>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

On most gen2-4 platforms the GTT can be (or maybe always is?)
inside the stolen memory region. If that's the case, reduce the
size of the stolen memory appropriately to make make sure we
don't clobber the GTT.

v2: Deal with gen4 36 bit physical address

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80151


Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

We should keep DEVICE_READY bit set in the ULPS enter sequence. In
exit sequence also we should set DEVICE_READY, but thats causing
blankout for me. Also exit sequence is simplified as per hw team
recommendation.

This should fix -
[drm:intel_dsi_clear_device_ready] *ERROR* DSI LP not going Low

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80818


Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

While sending DPI SHUTDOWN command, we cannot wait for FIFO empty as
pipes are not disabled at that time. In case of MIPI we disable port
first and send SHUTDOWN command while pipe is still running and FIFOs
will not be empty, causing spurious error log

Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

The Toshiba CB35 Chromebook (with Celeron 2955U CPU) has a controllable
backlight although its VBT reports otherwise. Apply quirk to ignore the
backlight presence check during backlight setup.

Patch tested by author on Toshiba CB35.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813


Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
CC: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org # 3.15 only
[danvet: Add cc: stable because the regressing commit is in 3.15.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

The Acer C720 and C720P Chromebooks (with Celeron 2955U CPU) have a
controllable backlight although their VBT reports otherwise. Apply quirk
to ignore the backlight presence check during backlight setup.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813


Tested-by: James Duley <jagduley@gmail.com>
Tested-by: Michael Mullin <masmullin@gmail.com>
Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
CC: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org # 3.15 only
[danvet: Add cc: stable because the regressing commit is in 3.15.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>