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[media] videobuf: only start streaming in poll() if so requested by the poll mask 

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2011-07-13 04:03:52 -03:00 committed by Mauro Carvalho Chehab
parent bf5c7cbb99
commit 0e17e9a9f6
1 changed files with 2 additions and 1 deletions
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3
drivers/media/video/videobuf-core.c
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@ -1129,6 +1129,7 @@ unsigned int videobuf_poll_stream(struct file *file,
struct videobuf_queue *q,
poll_table *wait)
{
unsigned long req_events = poll_requested_events(wait);
struct videobuf_buffer *buf = NULL;
unsigned int rc = 0;
@ -1137,7 +1138,7 @@ unsigned int videobuf_poll_stream(struct file *file,
if (!list_empty(&q->stream))
buf = list_entry(q->stream.next,
struct videobuf_buffer, stream);
} else {
} else if (req_events & (POLLIN | POLLRDNORM)) {
if (!q->reading)
__videobuf_read_start(q);
if (!q->reading) {