cxgb4 : Improve handling of DCB negotiation or loss thereof

Clear out any DCB apps we might have added to kernel table when we lose DCB
sync (or IEEE equivalent event). These were previously left behind and not
cleaned up correctly. IEEE allows individual components to work independently,
 so improve check for IEEE completion by specifying individual components.

Fixes: 10b0046685ab ("cxgb4: IEEE fixes for DCBx state machine")

Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
cxgb4 : Handle dcb enable correctly

Disabling DCBx in firmware automatically enables DCBx for control via host
lldp agents. Wait for an explicit setstate call from an lldp agents to enable
 DCBx instead.

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>
Merge branch 'cxgb4-net'

Anish Bhatt says:

====================
cxgb4 : DCBx fixes for apps/host lldp agents

This patchset  contains some minor fixes for cxgb4 DCBx code. Chiefly, cxgb4
was not cleaning up any apps added to kernel app table when link was lost.
Disabling DCBx in firmware would automatically set DCBx state to host-managed
and enabled, we now wait for an explicit enable call from an lldp agent instead

First patch was originally sent to net-next, but considering it applies to
correcting behaviour of code already in net, I think it qualifies as a bug fix.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
bpf: split eBPF out of NET

introduce two configs:
- hidden CONFIG_BPF to select eBPF interpreter that classic socket filters
  depend on
- visible CONFIG_BPF_SYSCALL (default off) that tracing and sockets can use

that solves several problems:
- tracing and others that wish to use eBPF don't need to depend on NET.
  They can use BPF_SYSCALL to allow loading from userspace or select BPF
  to use it directly from kernel in NET-less configs.
- in 3.18 programs cannot be attached to events yet, so don't force it on
- when the rest of eBPF infra is there in 3.19+, it's still useful to
  switch it off to minimize kernel size

bloat-o-meter on x64 shows:
add/remove: 0/60 grow/shrink: 0/2 up/down: 0/-15601 (-15601)

tested with many different config combinations. Hopefully didn't miss anything.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'drm-armada-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-fixes

Three changes for the Armada DRM driver:
1. Add back the flags which tell the DRM core that we can do vblank.  This
   was removed in error during the recent restructuring, and came to light
   while trying textured Xv rendering.

2. Fixing a refcount leak with Xv overlay.

3. As per recent discussion, the drm_vblank_pre_modeset() calls can cause
   deadlock with other changes to generic code.  This change prevents those
   deadlocks by switching to the drm_crtc_vblank_*() calls instead.

* 'drm-armada-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  drm/armada: convert to use vblank_on/off calls
  drm/armada: fix page_flip refcounting leak
  drm/armada: add IRQ support back
ASoC: fsl_asrc: Add reg_defaults for regmap to fix kernel dump

Kernel dump (WARN_ON) ocurred during system boot-up inside regmap_write():

------------[ cut here ]------------
WARNING: CPU: 0 PID: 47 at kernel/locking/lockdep.c:2744 lockdep_trace_alloc+0xe8/0x108()
DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))
Modules linked in:
CPU: 0 PID: 47 Comm: kworker/u2:2 Not tainted 3.18.0-rc1-10245-gb75d289-dirty #56
Workqueue: deferwq deferred_probe_work_func
Backtrace:
[<80012294>] (dump_backtrace) from [<80012578>] (show_stack+0x18/0x1c)
 r6:8097c73c r5:8097c73c r4:00000000 r3:be33ba80
[<80012560>] (show_stack) from [<806aac48>] (dump_stack+0x8c/0xa4)
[<806aabbc>] (dump_stack) from [<8002a694>] (warn_slowpath_common+0x70/0x94)
 r6:80062838 r5:00000009 r4:bd827b30 r3:be33ba80
[<8002a624>] (warn_slowpath_common) from [<8002a6f0>] (warn_slowpath_fmt+0x38/0x40)
 r8:00000004 r7:00000001 r6:000080d0 r5:60000193 r4:bd826010
[<8002a6bc>] (warn_slowpath_fmt) from [<80062838>] (lockdep_trace_alloc+0xe8/0x108)
 r3:80831590 r2:8082e160
[<80062750>] (lockdep_trace_alloc) from [<800ea5dc>] (kmem_cache_alloc+0x28/0x134)
 r5:000080d0 r4:be001f00
[<800ea5b4>] (kmem_cache_alloc) from [<8038d72c>] (regcache_rbtree_write+0x15c/0x648)
 r10:00000000 r9:0000001c r8:00000004 r7:00000001 r6:00000000 r5:bd819a00
 r4:00000000 r3:811aea88
[<8038d5d0>] (regcache_rbtree_write) from [<8038c4d8>] (regcache_write+0x5c/0x64)
 r10:be3f9f88 r9:00000000 r8:00000004 r7:00000001 r6:00000000 r5:00000001
 r4:bd819a00
[<8038c47c>] (regcache_write) from [<8038b0dc>] (_regmap_raw_write+0x134/0x5f4)
 r6:be3f9f84 r5:00000001 r4:bd819a00 r3:00000001
[<8038afa8>] (_regmap_raw_write) from [<8038b610>] (_regmap_bus_raw_write+0x74/0x94)
 r10:00000000 r9:00000001 r8:be3fb080 r7:bd819a00 r6:00000001 r5:00000000
 r4:bd819a00
[<8038b59c>] (_regmap_bus_raw_write) from [<8038a8b4>] (_regmap_write+0x60/0x9c)
 r6:00000001 r5:00000000 r4:bd819a00 r3:8038b59c
[<8038a854>] (_regmap_write) from [<8038ba24>] (regmap_write+0x48/0x68)
 r7:bd81ad80 r6:00000001 r5:00000000 r4:bd819a00
[<8038b9dc>] (regmap_write) from [<80528f30>] (fsl_asrc_dai_probe+0x34/0x104)
 r6:bd888628 r5:be3fb080 r4:be3b4410 r3:be3b442c
------------[ dump end ]------------

=============================================================================
2741         /*
2742          * Oi! Can't be having __GFP_FS allocations with IRQs disabled.
2743          */
2744         if (DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)))
2745                 return;
=============================================================================

By looking at 2744 line, we can get that it's because regcache_rbtree_write()
would call kmalloc() with GFP flag if it couldn't find an existing block to
insert nodes while this kmalloc() call is inside a spin_lock_irq_save pair,
i.e. IRQs disabled.

Even though this may be a bug that should be fixed, I still try to send this
patch as a quick fix (work around) since it does no harm to assign default
values of every registers when using regcache.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
ipvs: Avoid null-pointer deref in debug code

Use daddr instead of reaching into dest.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
power: bq2415x_charger: Properly handle ENODEV from power_supply_get_by_phandle

The power_supply_get_by_phandle() on error returns ENODEV or NULL.
The driver later expects obtained pointer to power supply to be
valid or NULL. If it is not NULL then it dereferences it in
bq2415x_notifier_call() which would lead to dereferencing ENODEV-value
pointer.

Properly handle the power_supply_get_by_phandle() error case by
replacing error value with NULL. This indicates that usb charger
detection won't be used.

Fix also memory leak of 'name' if power_supply_get_by_phandle() fails
with NULL and probe should defer.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: faffd234cf85 ("bq2415x_charger: Add DT support")
Cc: <stable@vger.kernel.org>
[small fix regarding the missing ti,usb-charger-detection info message]
Signed-off-by: Sebastian Reichel <sre@kernel.org>
power: bq2415x_charger: Fix memory leak on DTS parsing error

Memory allocated for 'name' was leaking if required binding properties
were not present.

The memory for 'name' was allocated early at probe with kasprintf(). It
was freed in error paths executed before and after parsing DTS but not
in that error path.

Fix the error path for parsing device tree properties.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: faffd234cf85 ("bq2415x_charger: Add DT support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
power_supply: Add no_thermal property to prevent recursive get_temp calls

Add a 'no_thermal' property to the power supply class. If true then
thermal zone won't be created for this power supply in
power_supply_register().

Power supply drivers may want to set it if they support
POWER_SUPPLY_PROP_TEMP and they are forwarding this get property call to
other thermal zone.

If they won't set it lockdep may report false positive deadlock for
thermal zone's mutex because of nested calls to thermal_zone_get_temp().
First is the call to thermal_zone_get_temp() of the driver's thermal
zone. Thermal core gets POWER_SUPPLY_PROP_TEMP property from this
driver. The driver then calls other thermal zone thermal_zone_get_temp()
and returns result.

Example of such driver is charger manager.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
power: charger-manager: Avoid recursive thermal get_temp call

The charger manager supports POWER_SUPPLY_PROP_TEMP property and acts
as a thermal zone if any of these conditions match:
1. Fuel gauge used by charger manager supports POWER_SUPPLY_PROP_TEMP.
2. 'cm-thermal-zone' property is present in DTS (then it will supersede
   the fuel gauge temperature property).

However in case 1 (fuel gauge reports temperature and 'cm-thermal-zone'
is not set) the charger manager forwards its get_temp calls to fuel
gauge thermal zone.

This leads to reporting by lockdep a false positive deadlock for thermal
zone's mutex because of nested calls to thermal_zone_get_temp(). This is
false positive because these are different mutexes: one for charger
manager thermal zone and second for fuel gauge thermal zone.

Get rid of false lockdep alert and recursive call by setting
'no_thermal' property for this power supply class. The thermal zone for
charger manager won't be created (user space does not use it anyway).

The lockdep report:
[    2.540339] charger-manager charger-manager@0: Ignoring full-battery voltage threshold as it is not supplied
[    2.540351] charger-manager charger-manager@0: Ignoring full-battery full capacity threshold as it is not supplied
[    2.546296]
[    2.546302] =============================================
[    2.546305] [ INFO: possible recursive locking detected ]
[    2.546312] 3.17.0-rc6-next-20140926-00012-gbb13895e46af-dirty #39 Not tainted
[    2.546316] ---------------------------------------------
[    2.546321] swapper/0/1 is trying to acquire lock:
[    2.546348]  (&tz->lock){+.+...}, at: [<c0321d24>] thermal_zone_get_temp+0x38/0x68
[    2.546352]
[    2.546352] but task is already holding lock:
[    2.546369]  (&tz->lock){+.+...}, at: [<c0321d24>] thermal_zone_get_temp+0x38/0x68
[    2.546373]
[    2.546373] other info that might help us debug this:
[    2.546376]  Possible unsafe locking scenario:
[    2.546376]
[    2.546378]        CPU0
[    2.546380]        ----
[    2.546386]   lock(&tz->lock);
[    2.546392]   lock(&tz->lock);
[    2.546394]
[    2.546394]  *** DEADLOCK ***
[    2.546394]
[    2.546397]  May be due to missing lock nesting notation
[    2.546397]
[    2.546401] 2 locks held by swapper/0/1:
[    2.546430]  #0:  (&dev->mutex){......}, at: [<c02720c4>] __driver_attach+0x58/0x98
[    2.546448]  #1:  (&tz->lock){+.+...}, at: [<c0321d24>] thermal_zone_get_temp+0x38/0x68
[    2.546451]
[    2.546451] stack backtrace:
[    2.546460] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-rc6-next-20140926-00012-gbb13895e46af-dirty #39
[    2.546497] [<c00140f0>] (unwind_backtrace) from [<c0011228>] (show_stack+0x10/0x14)
[    2.546526] [<c0011228>] (show_stack) from [<c046158c>] (dump_stack+0x70/0xbc)
[    2.546554] [<c046158c>] (dump_stack) from [<c005e32c>] (validate_chain.isra.24+0x718/0x890)
[    2.546569] [<c005e32c>] (validate_chain.isra.24) from [<c005f0a0>] (__lock_acquire+0x498/0xa78)
[    2.546581] [<c005f0a0>] (__lock_acquire) from [<c005fb50>] (lock_acquire+0x78/0xb8)
[    2.546594] [<c005fb50>] (lock_acquire) from [<c0464260>] (mutex_lock_nested+0x64/0x458)
[    2.546605] [<c0464260>] (mutex_lock_nested) from [<c0321d24>] (thermal_zone_get_temp+0x38/0x68)
[    2.546634] [<c0321d24>] (thermal_zone_get_temp) from [<c031f1e0>] (charger_get_property+0x10c/0x348)
[    2.546649] [<c031f1e0>] (charger_get_property) from [<c031af18>] (power_supply_read_temp+0x28/0x58)
[    2.546662] [<c031af18>] (power_supply_read_temp) from [<c0321d38>] (thermal_zone_get_temp+0x4c/0x68)
[    2.546676] [<c0321d38>] (thermal_zone_get_temp) from [<c03233d8>] (thermal_zone_device_update+0x24/0x9c)
[    2.546687] [<c03233d8>] (thermal_zone_device_update) from [<c0323874>] (thermal_zone_device_register+0x424/0x550)
[    2.546701] [<c0323874>] (thermal_zone_device_register) from [<c031b3c0>] (__power_supply_register+0x2a4/0x348)
[    2.546714] [<c031b3c0>] (__power_supply_register) from [<c031ff64>] (charger_manager_probe+0x600/0xe5c)
[    2.546727] [<c031ff64>] (charger_manager_probe) from [<c0273384>] (platform_drv_probe+0x48/0xa4)
[    2.546746] [<c0273384>] (platform_drv_probe) from [<c0271f54>] (driver_probe_device+0x10c/0x224)
[    2.546760] [<c0271f54>] (driver_probe_device) from [<c0272100>] (__driver_attach+0x94/0x98)
[    2.546772] [<c0272100>] (__driver_attach) from [<c0270780>] (bus_for_each_dev+0x54/0x88)
[    2.546784] [<c0270780>] (bus_for_each_dev) from [<c027173c>] (bus_add_driver+0xd4/0x1d0)
[    2.546797] [<c027173c>] (bus_add_driver) from [<c027271c>] (driver_register+0x78/0xf4)
[    2.546809] [<c027271c>] (driver_register) from [<c0008984>] (do_one_initcall+0x80/0x1d4)
[    2.546829] [<c0008984>] (do_one_initcall) from [<c0612d60>] (kernel_init_freeable+0x10c/0x1d8)
[    2.546847] [<c0612d60>] (kernel_init_freeable) from [<c045c238>] (kernel_init+0x8/0xec)
[    2.546863] [<c045c238>] (kernel_init) from [<c000e828>] (ret_from_fork+0x14/0x2c)
[    2.551396] charger-manager charger-manager@0: 'chg-reg' regulator's externally_control is 0

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
power: charger-manager: Fix accessing invalidated power supply after fuel gauge unbind

The charger manager obtained reference to fuel gauge power supply in probe
with power_supply_get_by_name() for later usage. However if fuel gauge
driver was removed and re-added then this reference would point to old
power supply (from driver which was removed).

This lead to accessing old (and probably invalid) memory which could be
observed with:
$ echo "12-0036" > /sys/bus/i2c/drivers/max17042/unbind
$ echo "12-0036" > /sys/bus/i2c/drivers/max17042/bind
$ cat /sys/devices/virtual/power_supply/battery/capacity
[  240.480084] INFO: task cat:1393 blocked for more than 120 seconds.
[  240.484799]       Not tainted 3.17.0-next-20141007-00028-ge60b6dd79570 #203
[  240.491782] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  240.499589] cat             D c0469530     0  1393      1 0x00000000
[  240.505947] [<c0469530>] (__schedule) from [<c0469d3c>] (schedule_preempt_disabled+0x14/0x20)
[  240.514449] [<c0469d3c>] (schedule_preempt_disabled) from [<c046af08>] (mutex_lock_nested+0x1bc/0x458)
[  240.523736] [<c046af08>] (mutex_lock_nested) from [<c0287a98>] (regmap_read+0x30/0x60)
[  240.531647] [<c0287a98>] (regmap_read) from [<c032238c>] (max17042_get_property+0x2e8/0x350)
[  240.540055] [<c032238c>] (max17042_get_property) from [<c03247d8>] (charger_get_property+0x264/0x348)
[  240.549252] [<c03247d8>] (charger_get_property) from [<c0320764>] (power_supply_show_property+0x48/0x1e0)
[  240.558808] [<c0320764>] (power_supply_show_property) from [<c027308c>] (dev_attr_show+0x1c/0x48)
[  240.567664] [<c027308c>] (dev_attr_show) from [<c0141fb0>] (sysfs_kf_seq_show+0x84/0x104)
[  240.575814] [<c0141fb0>] (sysfs_kf_seq_show) from [<c0140b18>] (kernfs_seq_show+0x24/0x28)
[  240.584061] [<c0140b18>] (kernfs_seq_show) from [<c0104574>] (seq_read+0x1b0/0x484)
[  240.591702] [<c0104574>] (seq_read) from [<c00e1e24>] (vfs_read+0x88/0x144)
[  240.598640] [<c00e1e24>] (vfs_read) from [<c00e1f20>] (SyS_read+0x40/0x8c)
[  240.605507] [<c00e1f20>] (SyS_read) from [<c000e760>] (ret_fast_syscall+0x0/0x48)
[  240.612952] 4 locks held by cat/1393:
[  240.616589]  #0:  (&p->lock){+.+.+.}, at: [<c01043f4>] seq_read+0x30/0x484
[  240.623414]  #1:  (&of->mutex){+.+.+.}, at: [<c01417dc>] kernfs_seq_start+0x1c/0x8c
[  240.631086]  #2:  (s_active#31){++++.+}, at: [<c01417e4>] kernfs_seq_start+0x24/0x8c
[  240.638777]  #3:  (&map->mutex){+.+...}, at: [<c0287a98>] regmap_read+0x30/0x60

The charger-manager should get reference to fuel gauge power supply on
each use of get_property callback. The thermal zone 'tzd' field of
power supply should not be used because of the same reason.

Additionally this change solves also the issue with nested
thermal_zone_get_temp() calls and related false lockdep positive for
deadlock for thermal zone's mutex [1]. When fuel gauge is used as source of
temperature then the charger manager forwards its get_temp calls to fuel
gauge thermal zone. So actually different mutexes are used (one for
charger manager thermal zone and second for fuel gauge thermal zone) but
for lockdep this is one class of mutex.

The recursion is removed by retrieving temperature through power
supply's get_property().

In case external thermal zone is used ('cm-thermal-zone' property is
present in DTS) the recursion does not exist. Charger manager simply
exports POWER_SUPPLY_PROP_TEMP_AMBIENT property (instead of
POWER_SUPPLY_PROP_TEMP) thus no thermal zone is created for this power
supply.

[1] https://lkml.org/lkml/2014/10/6/309

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Fixes: 3bb3dbbd56ea ("power_supply: Add initial Charger-Manager driver")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
power: charger-manager: Fix accessing invalidated power supply after charger unbind

The charger manager obtained in probe references to power supplies for
all chargers with power_supply_get_by_name() for later usage. However
if such charger driver was removed then this reference would point to
old power supply (from driver which was removed).

This lead to accessing invalid memory which could be observed with:
$ echo "max77693-charger" > /sys/bus/platform/drivers/max77693-charger/unbind
$ grep . /sys/devices/virtual/power_supply/battery/charger.0/*
$ grep . /sys/devices/virtual/power_supply/battery/*
[   15.339817] Unable to handle kernel paging request at virtual address 0001c12c
[   15.346187] pgd = edd08000
[   15.348814] [0001c12c] *pgd=6dce2831, *pte=00000000, *ppte=00000000
[   15.355075] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
[   15.360967] Modules linked in:
[   15.364010] CPU: 2 PID: 1388 Comm: grep Not tainted 3.17.0-next-20141007-00027-ga95e761db1b0 #245
[   15.372859] task: ee03ad00 ti: edcf6000 task.ti: edcf6000
[   15.378241] PC is at 0x1c12c
[   15.381113] LR is at is_ext_pwr_online+0x30/0x6c
[   15.385706] pc : [<0001c12c>]    lr : [<c0339fc4>]    psr: a0000013
[   15.385706] sp : edcf7e88  ip : 00000000  fp : 00000000
[   15.397161] r10: eeb02c08  r9 : c04b1f84  r8 : eeb02c00
[   15.402369] r7 : edc69a10  r6 : eea6ac10  r5 : eea6ac10  r4 : 00000004
[   15.408878] r3 : 0001c12c  r2 : edcf7e8c  r1 : 00000004  r0 : ee914418
[   15.415390] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   15.422506] Control: 10c5387d  Table: 6dd0804a  DAC: 00000015
[   15.428236] Process grep (pid: 1388, stack limit = 0xedcf6240)
[   15.434050] Stack: (0xedcf7e88 to 0xedcf8000)
[   15.438395] 7e80:                   ee03ad00 00000000 edcf7f80 eea6aca8 edcf7ec4 c033b7b0
[   15.446554] 7ea0: 00000001 ee1cc3f0 00000004 c06e1e44 eebdc000 c06e1e44 eeb02c00 c0337144
[   15.454713] 7ec0: ee2dac68 c005cffc ee1cc3c0 c06e1e44 00000fff 00001000 eebdc000 c0278ca8
[   15.462872] 7ee0: c0278c8c ee1cc3c0 eeb7ce00 c014422c edcf7f20 00008000 ee1cc3c0 ee9a48c0
[   15.471030] 7f00: 00000001 00000001 edcf7f80 c0142d94 c0142d70 c01060f4 00021000 ee1cc3f0
[   15.479190] 7f20: 00000000 00000000 c06a2150 eebdc000 2e7ec000 ee9a48c0 00008000 00021000
[   15.487349] 7f40: edcf7f80 00008000 edcf6000 00021000 00021000 c00e39a4 00000000 ee9a48c0
[   15.495508] 7f60: 00004000 00000000 00000000 ee9a48c0 ee9a48c0 00008000 00021000 c00e3aa0
[   15.503668] 7f80: 00000000 00000000 0001f2e0 0001f2e0 00021000 00001000 00000003 c000f364
[   15.511826] 7fa0: 00000000 c000f1a0 0001f2e0 00021000 00000003 00021000 00008000 00000000
[   15.519986] 7fc0: 0001f2e0 00021000 00001000 00000003 00000001 000205e8 00000000 00021000
[   15.528145] 7fe0: 00008000 bebbe910 0000a7ad b6edc49c 60000010 00000003 aaaaaaaa aaaaaaaa
[   15.536320] [<c0339fc4>] (is_ext_pwr_online) from [<c033b7b0>] (charger_get_property+0x170/0x314)
[   15.545164] [<c033b7b0>] (charger_get_property) from [<c0337144>] (power_supply_show_property+0x48/0x20c)
[   15.554719] [<c0337144>] (power_supply_show_property) from [<c0278ca8>] (dev_attr_show+0x1c/0x48)
[   15.563577] [<c0278ca8>] (dev_attr_show) from [<c014422c>] (sysfs_kf_seq_show+0x84/0x104)
[   15.571725] [<c014422c>] (sysfs_kf_seq_show) from [<c0142d94>] (kernfs_seq_show+0x24/0x28)
[   15.579973] [<c0142d94>] (kernfs_seq_show) from [<c01060f4>] (seq_read+0x1b0/0x484)
[   15.587614] [<c01060f4>] (seq_read) from [<c00e39a4>] (vfs_read+0x88/0x144)
[   15.594552] [<c00e39a4>] (vfs_read) from [<c00e3aa0>] (SyS_read+0x40/0x8c)
[   15.601417] [<c00e3aa0>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48)
[   15.608877] Code: bad PC value
[   15.611991] ---[ end trace a88fcc95208db283 ]---

The charger-manager should get reference to charger power supply on
each use of get_property callback.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Fixes: 3bb3dbbd56ea ("power_supply: Add initial Charger-Manager driver")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
ata: sata_rcar: Add r8a7793 device support

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Revert "powerpc/powernv: Fix endian bug in LPC bus debugfs accessors"

This reverts commit bf7588a0859580a45c63cb082825d77c13eca357.

Ben says although the code is not correct "[this] fix was completely
wrong and does more damages than it fixes things."

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
toshiba_acpi: Add Toshiba TECRA A50-A to the alt keymap dmi list

As bug #72551, the Toshiba TECRA A50-A series models also come with the
new keymap layout as found out by Azael Avalos, so add it to the dmi
table.

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=76971
Reported-and-tested-by: Blindekinder <rafael.raccuia@blindekinder.com>
Cc: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
asus-nb-wmi: Add wapf4 quirk for the X550VB

X550VB as many others Asus laptops need wapf4 quirk to make RFKILL
switch be functional. Otherwise system boots with wireless card
disabled and is only possible to enable it by suspend/resume.

Bug report:
http://bugzilla.redhat.com/show_bug.cgi?id=1089731#c23

Reported-and-tested-by: Vratislav Podzimek <vpodzime@redhat.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
samsung-laptop: Add broken-acpi-video quirk for NC210/NC110

The acpi-video backlight interface on the NC210 does not work, blacklist it
and use the samsung-laptop interface instead.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=861573
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80

The acpi-video backlight interface on the Acer KAV80 is broken, and worse
it causes the entire machine to slow down significantly after a suspend/resume.

Blacklist it, and use the acer-wmi backlight interface instead. Note that
the KAV80 is somewhat unique in that it is the only Acer model where we
fall back to acer-wmi after blacklisting, rather then using the native
(e.g. intel) backlight driver. This is done because there is no native
backlight interface on this model.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1128309
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
quirk for Lenovo Yoga 3: no rfkill switch

The Yoga 3 does not contain any physical rfkill switch. Therefore
disable the rfkill switch identically to the Yoga 2 approach.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>