block: blk-mq: support draining mq queue
authorMing Lei <tom.leiming@gmail.com>
Fri, 24 Jan 2014 21:15:10 +0000 (13:15 -0800)
committerJens Axboe <axboe@fb.com>
Mon, 30 Mar 2015 18:54:40 +0000 (12:54 -0600)
commite65ebc03ae62f9cd980bf84320585e0b47b85dd9
tree52293f64ac2d6d3fda43bf283797ab91695fdca5
parent84083353ad5536a222a67e593f14a88374bc415a
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>
block/blk-core.c
block/blk-exec.c
block/blk-mq.c
block/blk-mq.h