media_devnode_unregister_prepare — clear the media device node register bit
void media_devnode_unregister_prepare ( | struct media_devnode * devnode); |
This clears the passed device register bit. Future open calls will be met
with errors. Should be called before media_devnode_unregister to avoid
races with unregister and device file open calls.
This function can safely be called if the device node has never been registered or has already been unregistered.