diff options
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dev.c | 3 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-event.c | 17 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index a593ea0598b5..0ddc3554f1a4 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -28,6 +28,7 @@ #include <media/v4l2-common.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> +#include <media/v4l2-event.h> #define VIDEO_NUM_DEVICES 256 #define VIDEO_NAME "video4linux" @@ -1086,6 +1087,8 @@ void video_unregister_device(struct video_device *vdev) */ clear_bit(V4L2_FL_REGISTERED, &vdev->flags); mutex_unlock(&videodev_lock); + if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags)) + v4l2_event_wake_all(vdev); device_unregister(&vdev->dev); } EXPORT_SYMBOL(video_unregister_device); diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c index 290c6b213179..caad58bde326 100644 --- a/drivers/media/v4l2-core/v4l2-event.c +++ b/drivers/media/v4l2-core/v4l2-event.c @@ -187,6 +187,23 @@ int v4l2_event_pending(struct v4l2_fh *fh) } EXPORT_SYMBOL_GPL(v4l2_event_pending); +void v4l2_event_wake_all(struct video_device *vdev) +{ + struct v4l2_fh *fh; + unsigned long flags; + + if (!vdev) + return; + + spin_lock_irqsave(&vdev->fh_lock, flags); + + list_for_each_entry(fh, &vdev->fh_list, list) + wake_up_all(&fh->wait); + + spin_unlock_irqrestore(&vdev->fh_lock, flags); +} +EXPORT_SYMBOL_GPL(v4l2_event_wake_all); + static void __v4l2_event_unsubscribe(struct v4l2_subscribed_event *sev) { struct v4l2_fh *fh = sev->fh; |