diff options
| author | Janne Grunau <j@jannau.net> | 2009-03-26 14:32:54 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:42 -0300 |
| commit | d2ff3ec81628cbf9470c496b3d0c0780165643f5 (patch) | |
| tree | 75724b9a5300ef5b2c2a13299cffbfb49677c6f9 /drivers | |
| parent | a50ab29185a9ec31e5a6999e53add0508653e889 (diff) | |
V4L/DVB (11230): hdpvr: return immediately from hdpvr_poll if data is available
simplifies check for available data with hdpvr_get_next_buffer
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/hdpvr/hdpvr-video.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/media/video/hdpvr/hdpvr-video.c b/drivers/media/video/hdpvr/hdpvr-video.c index 9560e19d7cf..e9078cdedb2 100644 --- a/drivers/media/video/hdpvr/hdpvr-video.c +++ b/drivers/media/video/hdpvr/hdpvr-video.c @@ -479,6 +479,7 @@ err: static unsigned int hdpvr_poll(struct file *filp, poll_table *wait) { + struct hdpvr_buffer *buf = NULL; struct hdpvr_fh *fh = (struct hdpvr_fh *)filp->private_data; struct hdpvr_device *dev = fh->dev; unsigned int mask = 0; @@ -499,19 +500,14 @@ static unsigned int hdpvr_poll(struct file *filp, poll_table *wait) } mutex_unlock(&dev->io_mutex); - poll_wait(filp, &dev->wait_data, wait); - - mutex_lock(&dev->io_mutex); - if (!list_empty(&dev->rec_buff_list)) { - - struct hdpvr_buffer *buf = list_entry(dev->rec_buff_list.next, - struct hdpvr_buffer, - buff_list); - - if (buf->status == BUFSTAT_READY) - mask |= POLLIN | POLLRDNORM; + buf = hdpvr_get_next_buffer(dev); + /* only wait if no data is available */ + if (!buf || buf->status != BUFSTAT_READY) { + poll_wait(filp, &dev->wait_data, wait); + buf = hdpvr_get_next_buffer(dev); } - mutex_unlock(&dev->io_mutex); + if (buf && buf->status == BUFSTAT_READY) + mask |= POLLIN | POLLRDNORM; return mask; } |