wait_event_interruptible_timeout() returns a positive value when its condition becomes true before the timeout. mtk_jpegdec_worker() treats every nonzero result as a failure, so a normal decoder wakeup finishes the mem2mem job as though no hardware became available. Handle interrupted waits and exhausted timeout retries separately, and retry hardware selection after a successful wakeup. Increment the retry count only for actual timeouts. The encoder uses wait_event_interruptible(), whose successful return is zero, so its existing check is correct; leave that separate no-timeout policy unchanged. Fixes: dedc21500334 ("media: mtk-jpegdec: add jpeg decode worker interface") Cc: stable@vger.kernel.org Assisted-by: Codex:gpt-5 Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>