loop: add error handling support for add_disk()
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>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6dccba2..dcb126f 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:
