tree b02b9f95a2aae744e62b2b5c6ea46c7327efb276
parent c919c2a073c5d2e076e52a56b44281d922721b61
author Ben Dooks <ben-linux@fluff.org> 1303910659 +0100
committer Chris Ball <cjb@laptop.org> 1303946205 -0400

mmc: sdhci: Check mrq->cmd in sdhci_tasklet_finish

It seems that under certain circumstances that the sdhci_tasklet_finish()
call can be entered with mrq->cmd set to NULL, causing the system to crash
with a NULL pointer de-reference.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
PC is at sdhci_tasklet_finish+0x34/0xe8
LR is at sdhci_tasklet_finish+0x24/0xe8

Seen on S3C6410 system.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>