tree 2e7f132eb3583a235cf9a8e0dbe876db32c69a2a
parent 84ce0f0e94ac97217398b3b69c21c7a62ebeed05
author Sudip Mukherjee <sudipm.mukherjee@gmail.com> 1414082808 +0530
committer Jens Axboe <axboe@fb.com> 1414089342 -0600

block: fix wrong error return in elevator_init()

while compiling integer err was showing as a set but unused variable.
elevator_init_fn can be either cfq_init_queue or deadline_init_queue
or noop_init_queue.
all three of these functions are returning -ENOMEM if they fail to
allocate the queue.
so we should actually be returning the error code rather than
returning 0 always.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Jens Axboe <axboe@fb.com>