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    Subject[RFCv4 PATCH 4/6] videobuf: only start streaming in poll() if so requested by the poll mask.
    Date
    From: Hans Verkuil <hans.verkuil@cisco.com>

    Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
    ---
    drivers/media/video/videobuf-core.c | 3 ++-
    1 files changed, 2 insertions(+), 1 deletions(-)

    diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c
    index de4fa4e..ffdf59c 100644
    --- a/drivers/media/video/videobuf-core.c
    +++ b/drivers/media/video/videobuf-core.c
    @@ -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) {
    --
    1.7.5.4


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