From: Jon Mason <jon.mason@intel.com>
Date: Sun, 11 Nov 2012 23:03:20 +0000 (+0000)
Subject: dmatest: Fix NULL pointer dereference on ioat
X-Git-Tag: v3.9-rc1~80^2~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=944ea4dd38b8575e30a5699633c81945bff1864d;p=pandora-kernel.git

dmatest: Fix NULL pointer dereference on ioat

device_control is an optional and not implemented in all DMA drivers.
Any calls to these will result in a NULL pointer dereference.  dmatest
makes two of these calls when completing the kernel thread and removing
the module.  These are corrected by calling the dmaengine_device_control
wrapper and checking for a non-existant device_control function pointer
there.

Signed-off-by: Jon Mason <jon.mason@intel.com>
CC: Vinod Koul <vinod.koul@intel.com>
CC: Dan Williams <djbw@fb.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
---

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