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In gk20a_event_id_poll(), we always set the mask value and return it. This causes poll() from UMD to be always successful irrespective of event is really generated or not Fix this by adding a flag event_posted for each event Set this flag while posting the event In gk20a_event_id_poll(), set the mask value only if this flag is set. If flag is set, set mask and clear the flag Bug 200089620 Change-Id: If14236547c611fe4bfa1410ff5b69c9fa02d43bb Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/1160253 Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>