From: Daniel Fu <danifu@nvidia.com>
Date: Fri, 30 Aug 2013 11:48:22 +0000 (+0800)
Subject: cpuidle: Check the result of cpuidle_get_driver() against NULL
X-Git-Tag: v3.12-rc1~35^2~3^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b9c10e98021e1f92e6f8c7ce1778b86ba68db10;p=pandora-kernel.git

cpuidle: Check the result of cpuidle_get_driver() against NULL

If the current CPU has no cpuidle driver, drv will be NULL in
cpuidle_driver_ref().  Check if that is the case before trying
to bump up the driver's refcount to prevent the kernel from
crashing.

[rjw: Subject and changelog]
Signed-off-by: Daniel Fu <danifu@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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