diff options
| -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; } |