msm: ais: Synchronize v4l2 subscribe and unsubscribe event
Serializing msm_subscribe_event and msm_unsubscribe_event to
prevent possibility of use-after-free if same event is
unsubcribed before v4l2 subscribe and unsubscribe event.
Signed-off-by:
Rahul Sharma <sharah@codeaurora.org>
Change-Id: I83f1f69feb397b05c810ecbf94584aaab19ffe55
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