From: Minfei Huang <mnghuan@gmail.com>
Date: Tue, 7 Jun 2016 02:05:15 +0000 (+0800)
Subject: loop: Make user notify for adding loop device failed
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7a6497378ae832daa1668a10be04ebdacd60468b;p=linux-beck.git

loop: Make user notify for adding loop device failed

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 <mnghuan@gmail.com>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 364d491d4bdd..075377eee0c0 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;