[media] drxk: Does not unlock mutex if sanity check failed in scu_command()
If sanity check fails in scu_command(), goto error leads to unlock of an unheld mutex. The check should not fail in reality, but it nevertheless worth fixing. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru> Cc: stable@kernel.org Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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