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The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written !…

Thus fix affected source code places.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Replace the specification of data types by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

The script "checkpatch.pl" pointed information out like the following.

ERROR: do not use assignment in if condition

Thus fix the affected source code place.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Cannonlake is next generation Intel platform. This commit adds PCI ID for
it.
Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Declare snd_akm4xxx structures  as const as they are only passed
to the function snd_ice1712_akm4xxx_init. This argument is of type
const, so make the structures const.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
position p;
@@
static struct snd_akm4xxx s@p={...};

@good1@
identifier match.s;
position p;
@@
snd_ice1712_akm4xxx_init(...,&s@p,...)

@bad@
identifier match.s;
position p!={match.p,good1.p};
@@
s@p

@depends on !bad disable optional_qualifier@
identifier match.s;
@@
static
+const
struct snd_akm4xxx s={...};
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Declare snd_ak4xxx_private structures  as const as they are only passed
to the function snd_ice1712_akm4xxx_init. This argument is of type const,
so make the structures const.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
position p;
@@
static struct snd_ak4xxx_private s@p={...};

@good1@
identifier match.s;
position p;
@@
snd_ice1712_akm4xxx_init(...,&s@p,...)

@bad@
identifier match.s;
position p!={match.p,good1.p};
@@
s@p

@depends on !bad disable optional_qualifier@
identifier match.s;
@@
static
+const
struct snd_ak4xxx_private s={...};
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

User-defined element set registers own handler to get callbacks from TLV
ioctl handler. In the handler, execution path bifurcates depending on
requests from user space. At write request, container in given buffer is
registered to the element set, or replaced old TLV data. At the read
request, the registered data is copied to user space. The command request
is not allowed.  In current implementation, function of the handler
includes codes for the two cases.

This commit adds two helper functions for these cases so that readers can
easily get the above design.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

In a design of ALSA control core, execution path bifurcates depending on
target element. When a set with the target element has a handler, it's
called. Else, registered buffer is copied to user space. These two
operations are apparently different.  In current implementation, they're
on the same function with a condition statement. This makes it a bit hard
to understand conditions of each case.

This commit splits codes for these two cases.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

At a previous commit, concurrent requests for TLV data are maintained
exclusively between read requests and write/command requests. TLV
callback handlers in each driver has no risk from concurrent access for
reference/change.

In current implementation, 'struct snd_card' has a mutex to control
concurrent accesses to user-defined element sets. This commit obsoletes it.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

In ALSA control interface, applications can execute three types of request
for Type-Length-Value (TLV) data to a set of elements; read, write and
command. In ALSA control core, all of the requests are handled within read
lock to a counting semaphore, therefore several processes can run to access
to the data at the same time for any purposes. This has an issue because
write and command requests have side effect to change state of a set of
elements for the TLV data. Concurrent access should be controlled for each
of reference/change case.

This commit uses the counting semaphore as read lock for TLV read requests,
while use it as write lock for TLV write/command requests. The state of a
set of elements for the TLV data is maintained exclusively between read
requests and write/command requests, or between write and command requests.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Any control event is queued by a call of snd_ctl_notify(). This function
adds the event to each queue of opened file data corresponding to ALSA
control character devices. This function acquired two types of lock; a
counting semaphore for a list of the opened file data and a spinlock for
card data opened by the file. Typically, this function is called after
acquiring a counting semaphore for a list of elements in the card data.

In current implementation of TLV request handler, the function is called
after releasing the semaphore for a list of elements in the card data.
This release is not necessarily needed.

This commit removes the release to call the function within the critical
section so that later commits are simple.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Back-merge 4.13-rc devel branch for later development.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Merge tag 'asoc-fix-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v4.13

Quite a few fixes here that have been sent since the merge window, the
biggest one is the fix from Tony for some confusion with the device
property API which was causing issues with the of-graph card.  This is
fixed with some changes in the graph API itself as it seemed very likely
to be error prone.

Sony VAIO VPCL14M1R needs the quirk to make the speaker working properly.
Tested-by: Dmitriy <mexx400@yandex.ru>
Cc: <stable@vger.kernel.org>
Signed-off-by: Sergei A. Trusov <sergei.a.trusov@ya.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Merge remote-tracking branches 'asoc/fix/rt5663', 'asoc/fix/rt5665', 'asoc/fix/samsung', 'asoc/fix/sgtl5000' and 'asoc/fix/sh' into asoc-linus

Merge remote-tracking branches 'asoc/fix/dpcm', 'asoc/fix/imx', 'asoc/fix/msm8916', 'asoc/fix/multi-pcm', 'asoc/fix/of-graph' and 'asoc/fix/pxa' into asoc-linus

Fix inconsistent use of of_graph_get_port_parent() where
asoc_simple_card_parse_graph_dai() does of_node_get() before
calling it while other callers do not. We can fix this by
not trashing the node passed to of_graph_get_port_parent().

Let's also make sure the callers have correct refcounts and remove
related incorrect of_node_put() calls for of_for_each_phandle
as that's done by of_phandle_iterator_next() except when
we break out of the loop early.

Let's fix both issues with a single patch to avoid kobject
refcounts getting messed up more if two patches are merged
separately.

Otherwise strange issues can happen caused by memory corruption
caused by too many kobject_del() calls such as:

BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:747
...
(___might_sleep)
(__mutex_lock)
(mutex_lock_nested)
(kernfs_remove)
(kobject_del)
(kobject_put)
(of_get_next_parent)
(of_graph_get_port_parent)
(asoc_simple_card_parse_graph_dai [snd_soc_simple_card_utils])
(asoc_graph_card_probe [snd_soc_audio_graph_card])

Fixes: 0ef472a9 ("of_graph: add of_graph_get_port_parent()")
Fixes: 2692c1c6 ("ASoC: add audio-graph-card support")
Fixes: 1689333f ("ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai()")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

The register of setting back ratio should be RT5665_ADDA_CLK_2
instead of RT5665_ADDA_CLK_1.
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Pull x86 fixes from Thomas Gleixner:
 "A small set of x86 fixes:

   - prevent the kernel from using the EFI reboot method when EFI is
     disabled.

   - two patches addressing clang issues"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Disable the address-of-packed-member compiler warning
  x86/efi: Fix reboot_mode when EFI runtime services are disabled
  x86/boot: #undef memcpy() et al in string.c

Pull scheduler fixes from Thomas Gleixner:
 "Two patches addressing build warnings caused by inconsistent kernel
  doc comments"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/wait: Clean up some documentation warnings
  sched/core: Fix some documentation build warnings

Pull perf fixes from Thomas Gleixner:
 "A couple of fixes for performance counters and kprobes:

   - a series of small patches which make the uncore performance
     counters on Skylake server systems work correctly

   - add a missing instruction slot release to the failure path of
     kprobes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes/x86: Release insn_slot in failure path
  perf/x86/intel/uncore: Fix missing marker for skx_uncore_cha_extra_regs
  perf/x86/intel/uncore: Fix SKX CHA event extra regs
  perf/x86/intel/uncore: Remove invalid Skylake server CHA filter field
  perf/x86/intel/uncore: Fix Skylake server CHA LLC_LOOKUP event umask
  perf/x86/intel/uncore: Fix Skylake server PCU PMU event format
  perf/x86/intel/uncore: Fix Skylake UPI PMU event masks

Pull irq fix from Thomas Gleixner:
 "Fix for a regression caused by the conversion of x86 to the generic
  hotplug code.

  Instead of doing a plain single line revert, this adds a pile of
  comments so the semantics of the force argument are clear"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/cpuhotplug: Revert "Set force affinity flag on hotplug migration"

Pull DeviceTree fixes from Rob Herring:
 "Two small DT fixes:

   - Fix error handling in of_irq_to_resource_table() due to
     of_irq_to_resource() error return changes.

   - Fix dtx_diff script due to dts include path changes"

* tag 'devicetree-fixes-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of: irq: fix of_irq_to_resource() error check
  scripts/dtc: dtx_diff - update include dts paths to match build

Pull NFS client fixes from Anna Schumaker:
 "More NFS client bugfixes for 4.13.

  Most of these fix locking bugs that Ben and Neil noticed, but I also
  have a patch to fix one more access bug that was reported after last
  week.

  Stable fixes:
   - Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
   - Invalidate file size when taking a lock to prevent corruption

  Other fixes:
   - Don't excessively generate tiny writes with fallocate
   - Use the raw NFS access mask in nfs4_opendata_access()"

* tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
  NFS: Optimize fallocate by refreshing mapping when needed.
  NFS: invalidate file size when taking a lock.
  NFS: Use raw NFS access mask in nfs4_opendata_access()

Pull xfs fixes from Darrick Wong:

 - fix firstfsb variables that we left uninitialized, which could lead
   to locking problems.

 - check for NULL metadata buffer pointers before using them.

 - don't allow btree cursor manipulation if the btree block is corrupt.
   Better to just shut down.

 - fix infinite loop problems in quotacheck.

 - fix buffer overrun when validating directory blocks.

 - fix deadlock problem in bunmapi.

* tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix multi-AG deadlock in xfs_bunmapi
  xfs: check that dir block entries don't off the end of the buffer
  xfs: fix quotacheck dquot id overflow infinite loop
  xfs: check _alloc_read_agf buffer pointer before using
  xfs: set firstfsb to NULLFSBLOCK before feeding it to _bmapi_write
  xfs: check _btree_check_block value

Pull KVM fixes from Paolo Bonzini:
 "s390:
   - SRCU fix

  PPC:
   - host crash fixes

  x86:
   - bugfixes, including making nested posted interrupts really work

  Generic:
   - tweaks to kvm_stat and to uevents"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: LAPIC: Fix reentrancy issues with preempt notifiers
  tools/kvm_stat: add '-f help' to get the available event list
  tools/kvm_stat: use variables instead of hard paths in help output
  KVM: nVMX: Fix loss of L2's NMI blocking state
  KVM: nVMX: Fix posted intr delivery when vcpu is in guest mode
  x86: irq: Define a global vector for nested posted interrupts
  KVM: x86: do mask out upper bits of PAE CR3
  KVM: make pid available for uevents without debugfs
  KVM: s390: take srcu lock when getting/setting storage keys
  KVM: VMX: remove unused field
  KVM: PPC: Book3S HV: Fix host crash on changing HPT size
  KVM: PPC: Book3S HV: Enable TM before accessing TM registers

Pull xen fixes from Juergen Gross:
 "Three minor cleanups for xen related drivers"

* tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: dont fiddle with event channel masking in suspend/resume
  xen: selfballoon: remove unnecessary static in frontswap_selfshrink()
  xen: Drop un-informative message during boot

Pull arm64 fixes from Will Deacon:
 "I'd been collecting these whilst we debugged a CPU hotplug failure,
  but we ended up diagnosing that one to tglx, who has taken a fix via
  the -tip tree separately.

  We're seeing some NFS issues that we haven't gotten to the bottom of
  yet, and we've uncovered some issues with our backtracing too so there
  might be another fixes pull before we're done.

  Summary:

   - Ensure we have a guard page after the kernel image in vmalloc

   - Fix incorrect prefetch stride in copy_page

   - Ensure irqs are disabled in die()

   - Fix for event group validation in QCOM L2 PMU driver

   - Fix requesting of PMU IRQs on AMD Seattle

   - Minor cleanups and fixes"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mmu: Place guard page after mapping of kernel image
  drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU
  arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
  perf: qcom_l2: fix column exclusion check
  arm64/lib: copy_page: use consistent prefetch stride
  arm64/numa: Drop duplicate message
  perf: Convert to using %pOF instead of full_name
  arm64: Convert to using %pOF instead of full_name
  arm64: traps: disable irq in die()
  arm64: atomics: Remove '&' from '+&' asm constraint in lse atomics
  arm64: uaccess: Remove redundant __force from addr cast in __range_ok

Pull powerpc fixes from Michael Ellerman:
 "The highlight is Ben's patch to work around a host killing bug when
  running KVM guests with the Radix MMU on Power9. See the long change
  log of that commit for more detail.

  And then three fairly minor fixes:

   - fix of_node_put() underflow during reconfig remove, using old DLPAR
     tools.

   - fix recently introduced ld version check with 64-bit LE-only
     toolchain.

   - free the subpage_prot_table correctly, avoiding a memory leak.

  Thanks to: Aneesh Kumar K.V, Benjamin Herrenschmidt, Laurent Vivier"

* tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm/hash: Free the subpage_prot_table correctly
  powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain
  powerpc/pseries: Fix of_node_put() underflow during reconfig remove
  powerpc/mm/radix: Workaround prefetch issue with KVM

nfs4_retry_setlk() sets the task's state to TASK_INTERRUPTIBLE within the
same region protected by the wait_queue's lock after checking for a
notification from CB_NOTIFY_LOCK callback.  However, after releasing that
lock, a wakeup for that task may race in before the call to
freezable_schedule_timeout_interruptible() and set TASK_WAKING, then
freezable_schedule_timeout_interruptible() will set the state back to
TASK_INTERRUPTIBLE before the task will sleep.  The result is that the task
will sleep for the entire duration of the timeout.

Since we've already set TASK_INTERRUPTIBLE in the locked section, just use
freezable_schedule_timout() instead.

Fixes: a1d617d8 ("nfs: allow blocking locks to be awoken by lock callbacks")
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

Pull crypto fixes from Herbert Xu:

 - remove broken dt bindings in inside-secure

 - fix authencesn crash when used with digest_null

 - fix cavium/nitrox firmware path

 - fix SHA3 failure in brcm

 - fix Kconfig dependency for brcm

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: authencesn - Fix digest_null crash
  crypto: brcm - remove BCM_PDC_MBOX dependency in Kconfig
  Documentation/bindings: crypto: remove the dma-mask property
  crypto: inside-secure - do not parse the dma mask from dt
  crypto: cavium/nitrox - Change in firmware path.
  crypto: brcm - Fix SHA3-512 algorithm failure