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On channel_finish() path, we first check if last submit was WFI and in that case we do not submit new WFI but just wait on old syncpt fence. But it is possible that sync resource is already freed from another path (channel_suspend()) Hence add a NULL check there to prevent Null pointer exception. Also, in channel_free() path, move syncpt free API after channel_unbind() since we logically free the syncpt after unbinding the channel. Bug 1305024 Change-Id: Icc2fc83f004310560fc459527e1d37730428ec2d Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/400233 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Shridhar Rasal <srasal@nvidia.com> Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>