From: Ben Dooks <ben-linux@fluff.org>
Date: Wed, 27 Apr 2011 13:24:19 +0000 (+0100)
Subject: mmc: sdhci: Check mrq->cmd in sdhci_tasklet_finish
X-Git-Tag: v2.6.39-rc6~4^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7b4d3426d2b5ecab21578eb20d8e456a1aace8f;p=pandora-kernel.git

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>
---

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