tree c2879b7fc0c81d680745a2a8592e0fdf1cf876ba
parent b7b4d3426d2b5ecab21578eb20d8e456a1aace8f
author Chris Ball <cjb@laptop.org> 1303940131 -0400
committer Chris Ball <cjb@laptop.org> 1303946210 -0400

mmc: sdhci: Check mrq != NULL in sdhci_tasklet_finish

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

Seen on S3C6410 system.  Based on a patch by Dimitris Papastamos.

Reported-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>