diff options
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-dev.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dev.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index 1a4184b94838..10a126e50c1c 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -425,14 +425,26 @@ static int v4l2_open(struct inode *inode, struct file *filp) video_get(vdev); mutex_unlock(&videodev_lock); - if (video_is_registered(vdev)) - ret = vdev->fops->open(filp); - else + if (!video_is_registered(vdev)) { + ret = -ENODEV; + goto done; + } + + ret = vdev->fops->open(filp); + if (ret) + goto done; + + /* All drivers must use v4l2_fh. */ + if (WARN_ON(!test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))) { + vdev->fops->release(filp); ret = -ENODEV; + } +done: if (vdev->dev_debug & V4L2_DEV_DEBUG_FOP) dprintk("%s: open (%d)\n", video_device_node_name(vdev), ret); + /* decrease the refcount in case of an error */ if (ret) video_put(vdev); @@ -1114,8 +1126,7 @@ 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); + v4l2_event_wake_all(vdev); device_unregister(&vdev->dev); } EXPORT_SYMBOL(video_unregister_device); |