Hi Hans, I believe you've introduced a race condition in commit dd0daf2a6fb6bec436a3ef68bd585ea09a2a54b7 v4l2-dev: remove unnecessary lock around atomic clear_bit By removing the mutex_lock/unlock around clear_bit, you're allowing device_unregister() to race with v4l2_open(). The device can be unregistered between the video_devdata() and video_get() calls. Could you confirm my analysis ? -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
