__v4l2_device_register_subdev
ret = __v4l2_device_register_subdev(v4l2_dev, sd, sd->owner);
EXPORT_SYMBOL_GPL(__v4l2_device_register_subdev);
if (__v4l2_device_register_subdev(v4l2_dev, sd, sd->owner))
if (__v4l2_device_register_subdev(v4l2_dev, sd, sd->owner))
__v4l2_device_register_subdev(v4l2_dev, sd, THIS_MODULE)
int __must_check __v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,