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struct mipi_dsi_msg is a read-only structure, drivers should never need
to modify it. Make this explicit by making all references to the struct
const.
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Currently the mipi_dsi_dcs_write() function requires the DCS command
byte to be embedded within the write buffer whereas mipi_dsi_dcs_read()
has a separate parameter. Make them more symmetrical by adding an extra
command parameter to mipi_dsi_dcs_write().
The S6E8AA0 driver relies on the old asymmetric API and there's concern
that moving to the new API may be less efficient. Provide a new function
with the old semantics for those cases and make the S6E8AA0 driver use
it instead.
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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A common pattern is starting to emerge for higher level transfer
helpers. Create a new helper that encapsulates this pattern and avoids
code duplication.
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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This commit introduces a new function, mipi_dsi_create_packet(), which
converts from a MIPI DSI message to a MIPI DSI packet. The MIPI DSI
packet is as close to the protocol described in the DSI specification as
possible and useful in drivers that need to write a DSI packet into a
FIFO to send a message off to the peripheral.
Suggested-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Add two helpers, mipi_dsi_packet_format_is_{short,long}(), that help in
determining the format of a packet.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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drm_gem_object_release() called later in the drm_gem_cma_free_object()
function already calls this, so there's no need to do this explicitly.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Some drivers treat the pitch and size fields as inputs and will use them
as minima provided by userspace so that they are only overwritten if the
minimal requirements of the driver exceed them.
This can cause strange behaviour when applications don't zero out these
fields, causing whatever was on the stack to be passed to the IOCTL. In
a typical case this would become visible as a failed allocation if the
pitch or size were unusually high. But this could also cause more subtle
bugs like overallocating dumb framebuffers.
To prevent drivers from misusing these values, make the DRM core zero
out the pitch and size fields before passing the structure to the driver
implementation.
While at it, also set the output handle field to zero for good measure,
even though it's less likely to be abused.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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When creating a dumb buffer object using the DRM_IOCTL_MODE_CREATE_DUMB
IOCTL, only the width, height, bpp and flags fields are inputs. The
caller is not guaranteed to zero out or set handle, pitch and size.
Drivers must not treat these values as possible inputs, otherwise they
may use uninitialized memory during the computation of the framebuffer
size.
The R-Car DU driver treats the pitch passed in from userspace as minimum
and will only overwrite it when the driver-computed pitch is larger,
allowing userspace to, intentionally or not, overallocate framebuffers.
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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When creating a dumb buffer object using the DRM_IOCTL_MODE_CREATE_DUMB
IOCTL, only the width, height, bpp and flags fields are inputs. The
caller is not guaranteed to zero out or set handle, pitch and size.
Drivers must not treat these values as possible inputs, otherwise they
may use uninitialized memory during the computation of the framebuffer
size.
The OMAP driver uses the pitch field passed in by userspace as a minimum
and only override it if the driver-computed pitch is larger than what
userspace provided. To prevent this from causing overallocation, fix the
minimum pitch to 0 to enforce the driver-computed pitch.
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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This function is similar to drm_gem_cma_dumb_create() but targetted at
kernel internal users so that they can override the pitch and size
requirements of the dumb buffer.
It is important to make this difference because the IOCTL says that the
pitch and size fields are to be considered outputs and therefore should
not be used in computations of the framebuffer size. Internal users may
still want to use this code to avoid duplication and at the same time
pass on additional, driver-specific restrictions on the pitch and size.
While at it, convert the R-Car DU driver, the single user that overrides
the pitch, to use the new internal helper.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Most of the functions already have the beginnings of kerneldoc comments
but are using the wrong opening marker. Use the correct opening marker
and flesh out the comments so that they can be integrated with the DRM
DocBook document.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Use spaces consistently for indentation in the memory-management
section.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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While at it, adjust the drm_gem_handle_create() function declaration to
be more consistent with other functions in the file.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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into for-linus
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OpenBSD wants to reuse this file but needs the license to be more
permissive.
Acked-by: Alban Bedel <alban.bedel@avionic-design.de>
Acked-by: Daniel Vetter <daniel.vetter@intel.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The GMA500 driver redefines many constants already found in the generic
header. Replace uses of the custom defines by the standard ones and get
rid of the duplicate defininitions.
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The prototype and the function implementation differ in their signature.
Make them consistent and use an unsigned integer for the number of modes
while at it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Implementing a dummy of this function allows drivers that use it to be
built on platforms that don't have PCI. This can happen for example if
the nouveau driver is built on Tegra without PCI enabled (or on 64-bit
ARM where PCI is not yet implemented).
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The number of pages can never be negative, so an unsigned type is
enough. This also matches the type of the n_pages argument of the
sg_alloc_table_from_pages() function.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The function being documented is drm_gem_object_handle_free(), not
drm_gem_object_free().
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Creating a blob property will always copy the input data so the data
that is passed in can be const.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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size_t is the standard type when dealing with sizes of all kinds. Use it
consistently when instantiating DRM blob properties.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Lenovo Ideapad Z560 has a mute LED that is controlled via EAPD pin
0x1b on CX20585 codec. (EAPD bit on corresponds to mute LED on.)
The machine doesn't need other EAPD, so the fixup concentrates on
controlling EAPD 0x1b following the vmaster state (but inversely).
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=665315
Reported-by: Szymon Kowalczyk <fazerxlo@o2.pl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Commit f5866db6 (virtio_console: enable VQs early) tried to make
sure that DRIVER_OK was set when virtio_console started using its
virtqueues. Doing this in add_port(), however, means that we try
to set DRIVER_OK again when when a port is dynamically added after
the probe function is done.
Let's move virtio_device_ready() to the probe function just before
trying to use the virtqueues instead. This is fine as nothing can
fail inbetween.
Reported-by: Thomas Graf <tgraf@suug.ch>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Commit 1dce6264045cd23e9c07574ed0bb31c7dce9354f introduced a regression
spotted on several G94 (FDObz #85160). This device seems to expect the
vblank period to be set after setting scale instead of before.
V2: shove this in a separate function
This is a candidate bug-fix for 3.18
Signed-off-by: Roy Spliet <rspliet@eclipso.eu>
Tested-by: Zlatko Calusic <zcalusic@bitsync.net>
Tested-by: Michael Riesch <michael@riesch.at>
Tested-by: "poma" <pomidorabelisima@gmail.com>
Tested-by: Adam Williamson <adamw@happyassassin.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Commit "ltc/gf100-: fix cbc issues on certain boards" moved the setting
of the large page size bit from bar/nvc0 to fb/nvc0. GK20A uses its own
FB device and the change was thus not applied to it - fix this.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Pull kvm fixes from Paolo Bonzini:
"Two fixes --- one of them not exactly a one liner, but things are
calming down on the KVM front at last"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Fix uninitialized op->type for some immediate values
KVM: s390: virtio_ccw: remove unused variable
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Pull Xtensa fixes from Chris Zankel:
- fix umount syscall
- fix ISS and xtfpga Kconfig dependencies so that more randconfigs are
buildable
- add seccomp, getrandom, and memfd_create syscalls
- add defconfigs for KC705 and SMP LX200
- implement pgprot_noncached
* tag 'xtensa-20141109' of git://github.com/czankel/xtensa-linux:
xtensa: xtfpga: add lx200 SMP DTS and defconfig
xtensa: xtfpga: add generic KC705 board config
xtensa: re-wire umount syscall to sys_oldumount
xtensa: xtfpga: only select ethoc when ethernet is available
xtensa: add seccomp, getrandom, and memfd_create syscalls
xtensa: ISS: add BLOCK dependency to BLK_DEV_SIMDISK
xtensa: implement pgprot_noncached
xtensa/uapi: Add definition of TIOC[SG]RS485
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into drm-fixes
atom scratch register race fix.
* 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: add locking around atombios scratch space usage
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git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes
Now exynos drm driver incurs infinite loop issue on multi-platform
reported by Matwey V.Korniliv like below,
http://comments.gmane.org/gmane.comp.video.dri.devel/117622
This issue is because non kms drivers enabled are probed before
a component master tries to bring up. This patch set resolves
the infinite loop issue and also includes fixups relevant to exynos
drm internal issues.
* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: fix possible infinite loop issue
drm/exynos: g2d: fix null pointer dereference
drm/exynos: resolve infinite loop issue on non multi-platform
drm/exynos: resolve infinite loop issue on multi-platform
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into drm-next
Radeon patches for 3.19. Christian has a number of GPUVM improvements
slated as well, but I'd like to wait until he gets back to work next week
to pull those in. Highlights of this pull:
- ttm performance improvements
- CI dpm fixes
* 'drm-next-3.19' of git://people.freedesktop.org/~agd5f/linux: (26 commits)
drm/radeon/si/ci: make u8 static arrays constant
drm/radeon: set power control in ci dpm enable
drm/radeon: powertune fixes for hawaii
drm/radeon: fix dpm mc init for certain hawaii boards
drm/radeon: set bootup pcie level to max for ci dpm
drm/radeon: fix default dpm state setup
drm/radeon: workaround a hw bug in bonaire pcie dpm
drm/radeon: fix mclk vddc configuration for cards for hawaii
drm/radeon: fix sclk DS enablement
drm/radeon: fix activity settings for sclk and mclk for CI
drm/radeon: improve mclk param calcuations for ci dpm
drm/radeon: fix dram timing for certain hawaii boards
drm/radeon: switch force state commands for CI
drm/radeon: fix for memory training on bonaire 0x6649
drm/radeon/ci: handle gpio controlled dpm features properly
drm/radeon: store the gpio shift as well
drm/radeon: export radeon_atombios_lookup_gpio
drm/radeon: fix typo in CI dpm disable
drm/radeon: rework CI dpm thermal setup
drm/radeon: rework SI dpm thermal setup
...
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Pull crypto fixes from Herbert Xu:
- stack corruption fix for pseries hwrng driver
- add missing DMA unmap in caam crypto driver
- fix NUMA crash in qat crypto driver
- fix buggy mapping of zero-length associated data in qat crypto driver
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
hwrng: pseries - port to new read API and fix stack corruption
crypto: caam - fix missing dma unmap on error path
crypto: qat - Enforce valid numa configuration
crypto: qat - Prevent dma mapping zero length assoc data
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If state recovery failed, then we should not attempt to reclaim delegated
state.
http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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NFSv4.x (x>0) requires us to call TEST_STATEID+FREE_STATEID if a stateid is
revoked. We will currently fail to do this if the stateid is a delegation.
http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Any attempt to call nfs_remove_bad_delegation() while a delegation is being
returned is currently a no-op. This means that we can end up looping
forever in nfs_end_delegation_return() if something causes the delegation
to be revoked.
This patch adds a mechanism whereby the state recovery code can communicate
to the delegation return code that the delegation is no longer valid and
that it should not be used when reclaiming state.
It also changes the return value for nfs4_handle_delegation_recall_error()
to ensure that nfs_end_delegation_return() does not reattempt the lock
reclaim before state recovery is done.
http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt:
"Rabin Vincent found a way that tracing could cause an infinite loop in
the kernel. The splice logic wants a full page from the ring buffer
but the ring_buffer_wait() returns when there's any data in the ring
buffer. The splice code would then continue the loop waiting for a
full page. But if a full page never happens, the splice code will
never sleep and just continue to loop.
There's another case that Rabin fixed that could loop if there's no
memory and kmalloc() constantly returns NULL"
* tag 'trace-fixes-v3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Do not risk busy looping in buffer splice
tracing: Do not busy wait in buffer splice
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This patch removes the assumption made previously, that we only need to
check the delegation stateid when it matches the stateid on a cached
open.
If we believe that we hold a delegation for this file, then we must assume
that its stateid may have been revoked or expired too. If we don't test it
then our state recovery process may end up caching open/lock state in a
situation where it should not.
We therefore rename the function nfs41_clear_delegation_stateid as
nfs41_check_delegation_stateid, and change it to always run through the
delegation stateid test and recovery process as outlined in RFC5661.
http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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NFSv4.0 does not have TEST_STATEID/FREE_STATEID functionality, so
unlike NFSv4.1, the recovery procedure when stateids have expired or
have been revoked requires us to just forget the delegation.
http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull kernel argument parsing fix from Rusty Russell:
"Nasty, stupid bug, and I've suddenly had two reports"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
param: fix crash on bad kernel arguments
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- fix PCI device ID in fam15h_power driver
- fix suspend/resume behavior in pwm-fan driver
- reduce logging noise created by ibmpowernv driver
* tag 'hwmon-for-linus-v3.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (fam15h_power) Fix NB device ID for F16h M30h
hwmon: (pwm-fan) Fix suspend/resume behavior
hwmon: (ibmpowernv) Quieten when probing finds no device
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git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal
Pull thermal driver fixes from Eduardo Valentin:
"This week we have few fixes:
- fix in IMX thermal driver to do the correct loading sequence with
CPUfreq
- fix in Exynos related to TMU_CONTROL offset in Exynos5260
- fix the unit conversion in int3403"
[ Still pulling from Eduardo as Rui Zhang is on a business trip and has
troubles with his machine ]
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
imx: thermal: imx_get_temp might be called before sensor clock is prepared
thermal: exynos: use correct offset for TMU_CONTROL register on Exynos5260
thermal: imx: correct driver load sequence for cpu cooling
Thermal/int3403: Fix thermal hysteresis unit conversion
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Convert WARN_ONCE() to printk() in selinux_nlmsg_perm().
After conversion from audit_log() in commit e173fb26, WARN_ONCE() was
deemed too alarmist, so switch it to printk().
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[PM: Changed to printk(WARNING) so we catch all of the different
invalid netlink messages. In Richard's defense, he brought this
point up earlier, but I didn't understand his point at the time.]
Signed-off-by: Paul Moore <pmoore@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD fixes from Lee Jones:
- register offset fix for stmpe
- eradicate build warning when !PM in rtsx_pcr
- fix device ID collision when multiple boards are connected in
viperboard
- use correct Regmap handle - fixing unhanded IRQs in max77693
- unmask MUIC IRQs in max77693
- clear VBUS & CHG bits so board doesn't reboot instead of poweroff in
twl4030
* tag 'mfd-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
mfd: twl4030-power: Fix poweroff with PM configuration enabled
mfd: max77693: Fix always masked MUIC interrupts
mfd: max77693: Use proper regmap for handling MUIC interrupts
mfd: viperboard: Fix platform-device id collision
mfd: rtsx: Fix build warnings for !PM
mfd: stmpe: Fix STMPE24xx GPMR LSB
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Pull drm fixes from Dave Airlie:
"Radeon and i915 fixes.
I probably should have sent these earlier, but nothing too urgent in
them:
- i915:
blackscreen and corruption fixes
- radeon:
oops, locking and stability"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon: add missing crtc unlock when setting up the MC
drm/radeon: use gart for DMA IB tests
drm/radeon: make sure mode init is complete in bandwidth_update
drm/radeon: set correct CE ram size for CIK
drm/i915: safeguard against too high minimum brightness
drm/i915: vlv: fix gunit HW state corruption during S4 suspend
drm/i915: Disable caches for Global GTT.
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Even if netlink_kernel_cfg::unbind is implemented the unbind() method is
not called, because cfg->unbind is omitted in __netlink_kernel_create().
And fix wrong argument of test_bit() and off by one problem.
At this point, no unbind() method is implemented, so there is no real
issue.
Fixes: 4f520900522f ("netlink: have netlink per-protocol bind function return an error code.")
Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com>
Cc: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit ae5c6c6d "ptp: Classify ptp over ip over vlan packets" changed the
code in two drivers that matches time stamps with PTP frames, with the goal
of allowing VLAN tagged PTP packets to receive hardware time stamps.
However, that commit failed to account for the VLAN header when parsing
IPv4 packets. This patch fixes those two drivers to correctly match VLAN
tagged IPv4/UDP PTP messages with their time stamps.
This patch should also be applied to v3.17.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* In LLD_MANAGED mode, traffic classes were being returned in reverse order to
lldp agent.
* Priotype of strict is no longer the default returned.
* Change behaviour of getdcbx() based on discussions on lldp-devel
These were missed as there was no working fetch interface for open-lldp when
running in LLD_MANAGED mode till now.
Fixes: 76bcb31efc06 ("cxgb4 : Add DCBx support codebase and dcbnl_ops")
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Somehow the nfs_v4_1_minor_ops had the NFS_CAP_SEEK flag set, enabling
SEEK over v4.1. This is wrong, and can make servers crash.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Tested-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Variable 'err' needn't be initialized when nfs_getattr() uses it to
check whether it should call generic_fillattr() or not. That can result
in spurious error returns. Initialize 'err' properly.
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Commit 3a6fd1f004fc (pnfs/blocklayout: remove read-modify-write handling
in bl_write_pagelist) introduced a bogus assignment pg_index = pg_index
in variable initialization. AFAICS it's just a typo so remove it.
Spotted by Coverity (id 1248711).
CC: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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