Once we have called device_initialize(), we should use put_device() to
give up the reference on error, just like what we have done on failure
of device_add().
Signed-off-by: NDinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>