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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>
hifive-unleashed-5.1
Minfei Huang 2016-06-07 10:05:15 +08:00 committed by Jens Axboe
parent 6eae8c4520
commit 7a6497378a
1 changed files with 1 additions and 0 deletions
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drivers/block/loop.c
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@ -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;