From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Fri, 31 May 2013 14:37:25 +0000 (-0300)
Subject: [media] exynos4-is: Add locking at fimc(-lite) subdev unregistered handler
X-Git-Tag: v3.11-rc1~17^2~238
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26d63d13da2c7de2547f6f455ae20045285dfeb8;p=pandora-kernel.git

[media] exynos4-is: Add locking at fimc(-lite) subdev unregistered handler

Protect the fimc/fimc-lite video nodes unregistration with their video
lock. This prevents a kernel crash when e.g. udev opens a video node
right after the driver registers it and then the driver tries to
unregister it and defers its probing. Using video_is_unregistered()
together with the video mutex allows safe unregistration of the video
nodes at any time.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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