diff options
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 27 |
1 files changed, 8 insertions, 19 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 7aed8f2..2685670 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -3459,27 +3459,16 @@ unsigned int vb2_fop_poll(struct file *file, poll_table *wait) struct video_device *vdev = video_devdata(file); struct vb2_queue *q = vdev->queue; struct mutex *lock = q->lock ? q->lock : vdev->lock; - unsigned long req_events = poll_requested_events(wait); unsigned res; void *fileio; - bool must_lock = false; - - /* Try to be smart: only lock if polling might start fileio, - otherwise locking will only introduce unwanted delays. */ - if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) { - if (!V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_READ) && - (req_events & (POLLIN | POLLRDNORM))) - must_lock = true; - else if (V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_WRITE) && - (req_events & (POLLOUT | POLLWRNORM))) - must_lock = true; - } - /* If locking is needed, but this helper doesn't know how, then you - shouldn't be using this helper but you should write your own. */ - WARN_ON(must_lock && !lock); + /* + * If this helper doesn't know how to lock, then you shouldn't be using + * it but you should write your own. + */ + WARN_ON(!lock); - if (must_lock && lock && mutex_lock_interruptible(lock)) + if (lock && mutex_lock_interruptible(lock)) return POLLERR; fileio = q->fileio; @@ -3487,9 +3476,9 @@ unsigned int vb2_fop_poll(struct file *file, poll_table *wait) res = vb2_poll(vdev->queue, file, wait); /* If fileio was started, then we have a new queue owner. */ - if (must_lock && !fileio && q->fileio) + if (!fileio && q->fileio) q->owner = file->private_data; - if (must_lock && lock) + if (lock) mutex_unlock(lock); return res; } |
