diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 06eddefdf02a..d83fe2c2b3ba 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1578,7 +1578,7 @@ static int ublk_ctrl_start_dev(struct ublk_device *ub, struct io_uring_cmd *cmd)
 		goto out_unlock;
 	}
 
-	disk = blk_mq_alloc_disk(&ub->tag_set, ub);
+	disk = blk_mq_alloc_disk(&ub->tag_set, NULL);
 	if (IS_ERR(disk)) {
 		ret = PTR_ERR(disk);
 		goto out_unlock;