block/rnbd-clt: Move add_disk(dev->gd) to rnbd_clt_setup_gen_disk

It makes more sense to add gendisk in rnbd_clt_setup_gen_disk, instead
of do it in rnbd_clt_map_device.

Signed-off-by: Guoqing Jiang <guoqing.jiang@gmx.com>
Reviewed-by: Danil Kipnis <danil.kipnis@cloud.ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210419073722.15351-6-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/rnbd/rnbd-clt.c

@@ -1352,6 +1352,7 @@ static void rnbd_clt_setup_gen_disk(struct rnbd_clt_dev *dev, int idx)
 
 	if (!dev->rotational)
 		blk_queue_flag_set(QUEUE_FLAG_NONROT, dev->queue);
+	add_disk(dev->gd);
 }
 
 static int rnbd_client_setup_device(struct rnbd_clt_dev *dev)
@@ -1553,8 +1554,6 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
 		       dev->max_hw_sectors, dev->rotational, dev->wc, dev->fua);
 
 	mutex_unlock(&dev->lock);
-
-	add_disk(dev->gd);
 	rnbd_clt_put_sess(sess);
 
 	return dev;