sched,cgroup: Fix up task_groups list

With multiple instances of task_groups, for_each_rt_rq() is a noop,
no task groups having been added to the rt.c list instance.  This
renders __enable/disable_runtime() and print_rt_stats() noop, the
user (non) visible effect being that rt task groups are missing in
/proc/sched_debug.

Change-Id: Ib337ebda0e752f838d787c03fe1b0a8f03ea0551
Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: stable@kernel.org # v3.3+
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1344308413.6846.7.camel@marge.simpson.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Git-commit: 35cf4e50b16331def6cfcbee11e49270b6db07f5
Git-repo: git://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
ASoC: msm: qdsp6v2: Wait for stream to be available in gapless playback

Compressed driver operates on two streams in gapless mode and switches
between the two streams. If compressed playback operates on larger
buffers and the clip being played is small enough to fit in one
buffer, the driver could run into a scenario where three streams
need to be handled. Three streams results in no audio because stream
switching logic is corrupted. Fix is to block the next track call if
stream one has not completed playback.

CRs-Fixed: 594977
Change-Id: I6c83e859fa38f177ec7f4fa4ea92937d34df933a
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>
ASoC: msm: qdsp6v2: clear old memhandle list when SSR happens

When SSR triggers, ASM gets RESET_EVENT callback.
Clear custom topology related old memhandle list here.
Otherwise for next ASM session opened after SSR,
old memhandle is sent to DSP and result in no audio.
Also, for ASM session while unmap during SSR, APR
command fail is expected, even then go ahead and
clear old mem handles relating to session.
Add changes to clear it from list.

CRs-Fixed: 592823, 589762, 592580, 590719, 589450, 593497
Change-Id: I10fc8190e929c7a4a344b1d393233e6cbcfcee97
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>
ASoC: msm: qdsp6v2: check if backend active before querying RMS

RMS query to dsp should be done only when the relevant back end is
active to avoid un-necessary errors. Put a check to see if the
backend is active.

CRs-Fixed: 597886
Change-Id: I1ed402272eb34aa6120adbb97d1627a3f7f9b3c5
Signed-off-by: Jitendra Singh Naruka <jnaruk@codeaurora.org>
ASoC: Compress: Remove unused hw_params pointer

Remove the hw_params variable in
soc_compr_set_params_fe as the memory allocated
for it was not freed and the pointer itself was
not used.

CRs-Fixed: 601556
Change-Id: If2abfe58ad6dedab9b7ba21ae6f3b4bb5335cf42
Signed-off-by: Kenneth Westfield <kwestfie@codeaurora.org>
ASoC: msm: Condition change to feed buffer on resume

Feed data to the DSP on a CMD_RUN ack by looking at the number
of bytes sent to the DSP and not the number of bytes consumed

Change-Id: I45a670d244e20dd1f444a92b86737b7541a7ccf0
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>
ASoC: msm: qdsp6v2: ASM changes to use stream id as token parameter

Gapless compressed offload playback operates on two streams.
Platform driver needs to know the stream for which the command
callback is recieved. Use the token parameter in apr header to
pass the stream for ASM commands for which DSP expects stream and
session.

Change-Id: Ibd8f5b6a52f57ccf8cc7eea15eb460b2f9796120
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>
ASoc: msm: qdsp6v2: Fix for NULL check

- Required check added for NULL pointer

CRs-fixed: 583939
Change-Id: I8b079c42ef06af9a817dc830c5f2d3c785232aa7
Signed-off-by: Mingming Yin <mingming@codeaurora.org>
block: do not notify urgent request, when flush with data in flight

MMC device driver implements URGENT request execution with priority
(using stop flow), as a result currently running (and prepared) request
may be reinserted back into I/O scheduler. This will break block layer
logic of flushes (flush request should not be inserted into I/O scheduler).

Block layer flush machinery keep q->flush_data_in_flight list updated with
started but not completed flush requests with data (REQ_FUA).

This change will not notify underling block device driver about pending
urgent request during flushes in flight.

Change-Id: I8b654925a3c989250fcb8f4f7c998795fb203923
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
mmc: queue: do not clean current request when urgent in progress

As a result of following fix: "mmc: core: do not reinsert prepeared
FUA and FLUSH requests in stop flow" REQ_FUA and REQ_FLUSH requests
are not reinserted back into i/o scheduler, but instead started request
execution.

This change will prevent cleaning current request pointer for such
requests.

Change-Id: I25f8706954fb538be62182c87d5fb20354696b7a
CRs-fixed: 600127
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
sched: convert WARN_ON() to printk_sched() in try_to_wake_up_local()

try_to_wake_up_local() is called with the rq lock held. Printing to
console in this context can result in a deadlock if klogd needs to
be woken up. Print to the kernel log buffer via printk_sched()
instead which avoids the wakeup.

Change-Id: Ia07baea3cb7e0b158545207fdbbb866203256d3c
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
PM: devfreq: Fix simple_ondemand crashing on startup

simple_ondemands private data must be set to NULL, otherwise we would
run into a NULL pointer in kgsl_devfreq_get_dev_status().

Change-Id: I6cc6a8b11e3b58b8c3e3c26d43ee36949cf62351
ARM/dt: msm8974-gpu: Enable qcom bus-control

Honor DEVFREQ_FLAG_FAST/SLOW_HINT flags in adreno-tz.

Change-Id: I5b995fb29b690946651304ed1607214c63485abc
ARM/dt: hammerhead: Reduce minimum panel brightness

Default minimum brightness is a tad too high, this change makes reading
in a dark environment much more enjoyable. A value of 3 is still within
the valid range (see lm3630 blmap).

Change-Id: I40f690e7a06459a06db939c37108bae6fc9c52d6
msm: vidc: Validate session_id in video hardware response

Validate session_id present in video hardware response
packet before processing it. This will avoid system reset
resulting from invalid session_id returned from video hardware.

Change-Id: I37525a3d10b5efe00734c5533931e2700f3c7513
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>
msm: vidc: Skip session id validation for HFI_EVENT_SYS_ERROR

When SSR is triggered from driver, firmware is responding with session id
as 0X0000dead. Hence, firmware response is being discarded due to such
invalid session id. Skip session id validation for HFI_EVENT_SYS_ERROR
event type.

Change-Id: I750a7332baab4ebeb7702b49ffb744aae9803a36
CRs-Fixed: 539080
Signed-off-by: Srinu Gorle <sgorle@codeaurora.org>
msm: vidc: fix corruption of registered buffer list

The buffer list for output buffers is accessed from
different threads leading to race conditions. Consider
the case of firmware throwing up a fatal error, which gets
propagated to v4l2 client. The v4l2 client closes the
driver fd, which will trigger msm_vidc_release_buffers
to release all output buffers and free node from
the registered buffer list. During this time, if
firmware sends a release reference event, the buffer
node being accessed in msm_vidc_release_buffers could
be freed, triggering kernel panic.

Change-Id: I522edff06a62dbc2ab60d6cca5990babb18d5c6c
Signed-off-by: Arun Menon <avmenon@codeaurora.org>
msm: vidc: Send ABORT in FLUSH command from the Client

When session error is sent to the client, client issues FLUSH
and release buffers commands. But as instance state is INVALID,
these commands are never sent to the firmware, instead FLUSH
DONE and Release buffer done are sent back to client even
though firmware might be working on these buffers which may
result into page faults.
This change fixes the issue by sending ABORT command to the
firmware at the time when driver receives FLUSH command. Then
firmware will release all buffers, clean up session and send
ABORT_DONE back to the driver.

Change-Id: Ie4c79a312d2336c68b858f5f5e2a85331cf55f7b
CRs-fixed: 592920
Signed-off-by: Deepak Verma <dverma@codeaurora.org>
msm: vidc: reduce clk frquency before disable

The change ensures that the clock frequency is reduced to min
before we disable it.
With just clk_disable, rpm still votes for high voltage on CX
as venus vote is not removed.
To unvote, the frequency is set to min.

CRs-Fixed: 574365
Change-Id: I8e0515b9816f8c451d545443573afaba611aafe7
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
msm: vidc: avoid re-initialize of v4l2 spin lock

The fh_lock and fh_list variables are initialized
during probe in video_register_device. This was
re-initialized again when a new video instance was
opened. Since all video instances shared the same
fh_lock and fh_list variable, this gave rise to a race
condition in the v4l2 video driver. Consider the
case of multiple video instances being opened simultaneously.
One video instance has acquired the fh_lock and
calls a v4l2 function which calls v4l2_event_subscribe.
During this time another video instance is opened
and it re-intializes the fh_lock, so the first
instance no longer holds the spin lock and hits
ASSERT in v4l2_event_subscribed. This change
fixes the race condition.

Change-Id: I7af98c8f091cb94e6118c9e2ea1ba5d5d44c6833
Signed-off-by: Arun Menon <avmenon@codeaurora.org>