From: Ming Lei <tom.leiming@gmail.com>
Date: Thu, 26 Dec 2013 13:31:35 +0000 (+0800)
Subject: block: blk-mq: support draining mq queue
X-Git-Tag: v3.14-rc1~43^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=43a5e4e21964a6efb4d14a34644ec7109d0ae891;p=pandora-kernel.git

block: blk-mq: support draining mq queue

blk_mq_drain_queue() is introduced so that we can drain
mq queue inside blk_cleanup_queue().

Also don't accept new requests any more if queue is marked
as dying.

Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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