Revert "block: Add URGENT request notification support to CFQ scheduler"

This reverts commit b410a82118cdaa1dc92759e7995c20dcce0d1f1a.
The reverted commit was identified as the cause of the FS error
mentioned in the CR bellow.
It's reverted till further annalists of the root cause of FS error.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
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: Pranav Vashi <neobuddy89@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.

Signed-off-by: Lee Susman <lsusman@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mmc: print an error on FLUSH timeout

Up until now the FLUSH timeout error was not printed and there
was no way to know if the FLUSH completed successfully or not.
Printing the FLUSH failure will help to identify if FS corruption
happened due to this timeout.

Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@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: Panwar Vivek <vpanwa@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@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.

Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@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.

Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@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.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mmc: sdhci: Use max timeout and skip timeout calculation

Several data-timeout issues were seen, most of which were
due to the card taking a longer time to respond. This patch
increases the timeout of the controller to 0xF i.e. max
possible.

Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@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.

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: Pranav Vashi <neobuddy89@gmail.com>
vfp: Use neon-vfpv4 instead of neon

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mmc: sdhci: rectify file name

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm8974: Lower thermal default limits

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
defconfig: sync with android-3.4

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>