Mike Snitzer 9d1deb83d4 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>
2015-04-15 12:10:13 -04:00
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