mmc: core: Refactor bus speed selection code

The bus speed selection code in mmc_card_init() is convoluted, refactor
the code to simplify this and make it simpler for adding new bus speed
capabilities.

Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: card: update long_sequential_write_test queue depth

Since some systems have higher memory pressure, we limit the amount of
simultaneous test requests. The former limitation was 118, due to the
request queue size, but now we further restrict this number to half.

Change-Id: I893b9ad1b133c922f90497b0ec1f416514529fb8
CRs-fixed: 510814
Signed-off-by: Lee Susman <lsusman@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: block: flush request requeue after timeout.

On some eMMC cards cache flush is taking longer than 30 sec timeout
after HPI issued and -EIO reported to the upper layers. This may result
into journaling issues as flush calls are issued by the file system
joulrnaling code.

This change increases flash cache timeout to 90 sec, in case of timeout
occurs, after HPI issued, flash request re-queued to the block layer queue
to execute it later and keep journaling logic valid.

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	drivers/mmc/card/block.c

Change-Id: I1e968c07056062fd9c8e14e5bc3e62b3b4b99c64
Signed-off-by: Panwar Vivek <vpanwa@codeaurora.org>

Conflicts:

	drivers/mmc/card/block.c

Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
sdhci: sdhci_stop_request() returns error when no request

There is race between sdhci_tasklet_finish()
and sdhci_stop_request(): when the request is finished before
stop flow called, error returned.

Change-Id: Ic036feae925b2e9e5435e44f97b24a179547bf49
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: core: skip stop flow when current request already done

When mmc_stop_request() has no request to stop, because underlying
host driver reported this, the flow should wait for the mmc done()
callback marking that urgent still pending.

Change-Id: Iacc95591ee76a965916af05a31a67dd8997c233e
CRs-Fixed: 538117
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: block: Fix error path of mmc_blk_alloc_req()

In case of any error within mmc_blk_alloc_req(), the bitmaps
that keep track of devices are not getting cleared. This may
result in failure to detect a card in case it reaches maximum
devices limitation. Fix it by clearing those bitmaps appropriately.

CRs-fixed: 563264
Change-Id: I0e23c45856355565534146f5fabb957fd4b1d007
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: core: increase timeout for disable cache operation

According to eMMC specification, there is no upper bound defined on
a flush request and the duration of flush operation is left to card
vendor's implementation. This means that it may take a very long
time to complete.

When eMMC cache is disabled, the card has to flush all the data in its
cache. So this means that for certain cards, the driver is not waiting
long enough for the flush to complete during cache disable operation,
leading to data on the card being corrupted.

This change increases the timeout for cache disable operation, thus
preventing data corruption.

CRs-Fixed: 562350
Change-Id: If68328ab56b50c7596800f07ef92c0ab16a55ec0
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: David Ng <dave@codeaurora.org>
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: block: stop bkops during shutdown

[   42.885198] SysRq : Emergency Remount R/O
[   43.003988] mmc0: mmc_bus_shutdown: invoked ###
[   43.033289] mmc0: mmc_bus_shutdown: done ###
[   43.118486] mmc0: sdhci_request: sending cmd8 after bus shutdown !!!
[   43.147955] [<c0659ca4>] (sdhci_request+0x4c/0x260) from
				[<c063ee24>] (mmc_start_request+0x27c/0x2b0)
[   43.157152] [<c063ee24>] (mmc_start_request+0x27c/0x2b0) from
				[<c063eec4>] (mmc_wait_for_req+0x6c/0x13c)
[   43.166618] [<c063eec4>] (mmc_wait_for_req+0x6c/0x13c) from
				[<c0645ed4>] (mmc_send_cxd_data+0xe0/0x114)
[   43.175991] [<c0645ed4>] (mmc_send_cxd_data+0xe0/0x114) from
				[<c0645f24>] (mmc_send_ext_csd+0x1c/0x20)
[   43.185277] [<c0645f24>] (mmc_send_ext_csd+0x1c/0x20) from
				[<c063df28>] (mmc_read_bkops_status+0x98/0xdc)
[   43.194823] [<c063df28>] (mmc_read_bkops_status+0x98/0xdc) from
				[<c06417ac>] (mmc_start_bkops+0x168/0x324)
[   43.204461] [<c06417ac>] (mmc_start_bkops+0x168/0x324) from
				[<c01a9584>] (process_one_work+0x200/0x400)
[   43.213835] [<c01a9584>] (process_one_work+0x200/0x400) from
				[<c01a9934>] (worker_thread+0x184/0x2a4)
[   43.223039] [<c01a9934>] (worker_thread+0x184/0x2a4) from
				[<c01ae010>] (kthread+0x80/0x90)
[   43.231286] [<c01ae010>] (kthread+0x80/0x90) from
				[<c0106c4c>] (kernel_thread_exit+0x0/0x8)
[   45.648206] wcnss crash shutdown 0
[   45.650599] Rebooting in 5 seconds..

In the above log, it is seen that the bkops thread runs after
mmc_bus_shutdown is completed and sends CMD8. Hence, cancel
bkops work during shutdown to prevent sending commands after
mmc bus is shutdown.

CRs-fixed: 593813
Change-Id: I3e8e9eb228bd03603d04561eb478d60664f50aaa
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
tracing/syscalls: Fix perf syscall tracing when syscall_nr == -1

syscall_get_nr can return -1 in the case that the task is not executing
a system call.

This patch fixes perf_syscall_{enter,exit} to check that the syscall
number is valid before using it as an index into a bitmap.

Link: http://lkml.kernel.org/r/1345137254-7377-1-git-send-email-will.deacon@arm.com

Change-Id: Iedc719957e184c6572b3ad94e241ae2a97a0b533
Cc: Jason Baron <jbaron@redhat.com>
Cc: Wade Farnsworth <wade_farnsworth@mentor.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
tracing/syscalls: Ignore numbers outside NR_syscalls' range

ARM has some private syscalls (for example, set_tls(2)) which lie
outside the range of NR_syscalls.  If any of these are called while
syscall tracing is being performed, out-of-bounds array access will
occur in the ftrace and perf sys_{enter,exit} handlers.

 # trace-cmd record -e raw_syscalls:* true && trace-cmd report
 ...
 true-653   [000]   384.675777: sys_enter:            NR 192 (0, 1000, 3, 4000022, ffffffff, 0)
 true-653   [000]   384.675812: sys_exit:             NR 192 = 1995915264
 true-653   [000]   384.675971: sys_enter:            NR 983045 (76f74480, 76f74000, 76f74b28, 76f74480, 76f76f74, 1)
 true-653   [000]   384.675988: sys_exit:             NR 983045 = 0
 ...

 # trace-cmd record -e syscalls:* true
 [   17.289329] Unable to handle kernel paging request at virtual address aaaaaace
 [   17.289590] pgd = 9e71c000
 [   17.289696] [aaaaaace] *pgd=00000000
 [   17.289985] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
 [   17.290169] Modules linked in:
 [   17.290391] CPU: 0 PID: 704 Comm: true Not tainted 3.18.0-rc2+ #21
 [   17.290585] task: 9f4dab00 ti: 9e710000 task.ti: 9e710000
 [   17.290747] PC is at ftrace_syscall_enter+0x48/0x1f8
 [   17.290866] LR is at syscall_trace_enter+0x124/0x184

Fix this by ignoring out-of-NR_syscalls-bounds syscall numbers.

Commit cd0980fc8add "tracing: Check invalid syscall nr while tracing syscalls"
added the check for less than zero, but it should have also checked
for greater than NR_syscalls.

Link: http://lkml.kernel.org/p/1414620418-29472-1-git-send-email-rabin@rab.in

Fixes: cd0980fc8add "tracing: Check invalid syscall nr while tracing syscalls"
Cc: stable@vger.kernel.org # 2.6.33+
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	kernel/trace/trace_syscalls.c

Change-Id: I512142f8f1e1b2a8dc063209666dbce9737377e7
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
msm: camera2: cpp: Reduce debug prints in cpp driver

The cpp driver had prints to monitor the status when node
is closed. This change makes them as pr_debug messages.

Change-Id: I8a78e6b38d7a702ed38f980d8fa658f50439da0f
Signed-off-by: Rajakumar Govindaram <rajakuma@codeaurora.org>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
msm: vidc: Initialize kernel space stack variables

This change initializes kernel space stack variables
that are passed between kernel space and user space
using ioctls.
Non initialization of these variables may lead to
leakage of memory values from the kernel stack to
user space.

Change-Id: I5b45f3a7baf9c538fee2ec356cd8545f8b042b5e
CRs-fixed: 556771,563420
Signed-off-by: Deepak Verma <dverma@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>