[RFC v1 6/6] loop: add error handling support for add_disk()

[Luis Chamberlain <mcgrof@kernel.org>]

We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/block/loop.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6dccba22c9b5..dcb126f3a7e1 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -2096,10 +2096,15 @@ static int loop_add(struct loop_device **l, int i)
 	disk->private_data	= lo;
 	disk->queue		= lo->lo_queue;
 	sprintf(disk->disk_name, "loop%d", i);
-	add_disk(disk);
+	err = add_disk(disk);
+	if (err)
+		goto out_put_disk;
+
 	*l = lo;
 	return lo->lo_number;
 
+out_put_disk:
+	put_disk(lo->lo_disk);
 out_free_queue:
 	blk_cleanup_queue(lo->lo_queue);
 out_cleanup_tags:
-- 
2.25.1