tree c43c57c89f2be2b72dee12183172af907436a999
parent b2ed8af910a436e12038f8ec8ca6c039f43767a4
author Mauro Carvalho Chehab <mchehab@osg.samsung.com> 1450175811 -0200
committer Mauro Carvalho Chehab <mchehab@osg.samsung.com> 1452521955 -0200

[media] media-device: better lock media_device_unregister()

If media_device_unregister() is called by two different
drivers, a race condition may happen, as the check if the
device is not registered is not protected.

Move the spin_lock() to happen earlier in the function, in order
to prevent such race condition.

Reported-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>