tree 30ddc2eaf3ce455b7b6cf5d7a1959bb538f430da
parent 9a0e609e3fd8a95c96629b9fbde6b8c5b9a1456a
author Mike Snitzer <snitzer@redhat.com> 1424828958 -0500
committer Mike Snitzer <snitzer@redhat.com> 1429114213 -0400

dm: don't schedule delayed run of the queue if nothing to do

In request-based DM's dm_request_fn(), if blk_peek_request() returns
NULL just return.  Avoids unnecessary blk_delay_queue().

Reported-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>