tree 6a9e862fb8ceccf5c64663630d5c2df1f5535656
parent 737f98cfe7de8df7433a4d846850aa8efa44bd48
author Ming Lei <tom.leiming@gmail.com> 1487758440 +0800
committer Jens Axboe <axboe@fb.com> 1488992172 -0700

blk-mq: make lifetime consitent between q/ctx and its kobject

Currently from kobject view, both q->mq_kobj and ctx->kobj can
be released during one cycle of blk_mq_register_dev() and
blk_mq_unregister_dev(). Actually, sw queue's lifetime is
same with its request queue's, which is covered by request_queue->kobj.

So we don't need to call kobject_put() for the two kinds of
kobject in __blk_mq_unregister_dev(), instead we do that
in release handler of request queue.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Jens Axboe <axboe@fb.com>