From: Mike Snitzer <snitzer@redhat.com>
Date: Wed, 25 Feb 2015 01:49:18 +0000 (-0500)
Subject: dm: don't schedule delayed run of the queue if nothing to do
X-Git-Tag: omap-for-v4.1/fixes-rc1~106^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9d1deb83d489;p=pandora-kernel.git

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>
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