[PATCH] loop: Make user notify for adding loop device failed

[Minfei Huang]

There is no error number returned if loop driver fails in function
alloc_disk to add new loop device. Add a correct error number to make
user notify in this case.

Signed-off-by: Minfei Huang <mngh...@gmail.com>
---
 drivers/block/loop.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 1fa8cc2..2caaf6f 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1765,6 +1765,7 @@ static int loop_add(struct loop_device **l, int i)
         */
        queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, lo->lo_queue);
 
+       err = -ENOMEM;
        disk = lo->lo_disk = alloc_disk(1 << part_shift);
        if (!disk)
                goto out_free_queue;
-- 
2.7.4 (Apple Git-66)