tree: git://linuxtv.org/media_tree.git devel
head: e0857d1d1af8478b33e63dbb22bb2160a807d868
commit: e0857d1d1af8478b33e63dbb22bb2160a807d868 [499/499] [media] BZ#84401: Revert "[media] v4l: vb2: Don't return POLLERR during transient buffer underruns"
drivers/media/v4l2-core/videobuf2-core.c:2589 vb2_poll() warn: if();
vim +2589 drivers/media/v4l2-core/videobuf2-core.c
2573 }
2574 if (V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_WRITE) &&
2575 (req_events & (POLLOUT | POLLWRNORM))) {
2576 if (__vb2_init_fileio(q, 0))
2577 return res | POLLERR;
2578 /*
2579 * Write to OUTPUT queue can be done immediately.
2580 */
2581 return res | POLLOUT | POLLWRNORM;
2582 }
2583 }
2584
2585 /*
2586 * There is nothing to wait for if no buffer has been queued
2587 * or if the error flag is set.
2588 */
> 2589 if ((list_empty(&q->queued_list) || q->error)
2590 return res | POLLERR;
2591
2592 /*
2593 * For output streams you can write as long as there are fewer buffers
2594 * queued than there are buffers available.
2595 */
2596 if (V4L2_TYPE_IS_OUTPUT(q->type) && q->queued_count < q->num_buffers)
2597 return res | POLLOUT | POLLWRNORM;
---
0-DAY kernel build testing backend Open Source Technology Center
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