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Subject: [media] media: vb2: return for polling if a buffer is available Author: Seung-Woo Kim <sw0312....@samsung.com> Date: Mon May 20 23:47:29 2013 -0300 The vb2_poll() does not need to wait next vb_buffer_done() if there is already a buffer in done_list of queue, but current vb2_poll() always waits. So done_list is checked before calling poll_wait(). Signed-off-by: Seung-Woo Kim <sw0312....@samsung.com> Acked-by: Marek Szyprowski <m.szyprow...@samsung.com> Signed-off-by: Kamil Debski <k.deb...@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com> drivers/media/v4l2-core/videobuf2-core.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) --- http://git.linuxtv.org/media_tree.git?a=commitdiff;h=412cb87d28a1f299ee82fe1c8bfe6cbeec9a4655 diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 7d833ee..e3bdc3b 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -2014,7 +2014,8 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait) if (list_empty(&q->queued_list)) return res | POLLERR; - poll_wait(file, &q->done_wq, wait); + if (list_empty(&q->done_list)) + poll_wait(file, &q->done_wq, wait); /* * Take first buffer available for dequeuing. _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
