tree 23e564a443edbcb4f32ba4fcf750b56587797a87
parent 3f359a7cb1847900bc87b3498f72c1ee848942a7
author Laurent Pinchart <laurent.pinchart@ideasonboard.com> 1372848546 -0300
committer Mauro Carvalho Chehab <m.chehab@samsung.com> 1376826573 -0300

[media] v4l: async: Make it safe to unregister unregistered notifier

Calling v4l2_async_notifier_unregister() on a notifier that hasn't been
registered leads to a crash. To simplify drivers, make it safe to
unregister a notifier that has not been registered.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>