media: v4l2-mem2mem: add q->error check to v4l2_m2m_poll() (96ebc0ca) · Commits · 戴 / test

The v4l2_m2m_poll function didn't check whether q->error was set for either of the two queues. Add support for this. Signed-off-by:

drivers/media/v4l2-core/v4l2-mem2mem.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -638,8 +638,10 @@ __poll_t v4l2_m2m_poll(struct file file, struct v4l2_m2m_ctx m2m_ctx,
		* means either in driver already or waiting for driver to claim it
		* and start processing.
		*/
		if ((!src_q->streaming \|\| list_empty(&src_q->queued_list))
		&& (!dst_q->streaming \|\| list_empty(&dst_q->queued_list))) {
		if ((!src_q->streaming \|\| src_q->error \|\|
		list_empty(&src_q->queued_list)) &&
		(!dst_q->streaming \|\| dst_q->error \|\|
		list_empty(&dst_q->queued_list))) {
		rc \|= EPOLLERR;
		goto end;
		}