tree 4b957413d55cca86e87293647d2a1d889cb02261
parent 698b53b3119c45a59eef10b516d780b3e9a5402d
author Ming Lei <ming.lei@redhat.com> 1540387089 +0800
committer Jens Axboe <axboe@kernel.dk> 1540996836 -0600

block: call rq_qos_exit() after queue is frozen

rq_qos_exit() removes the current q->rq_qos, this action has to be
done after queue is frozen, otherwise the IO queue path may never
be waken up, then IO hang is caused.

So fixes this issue by moving rq_qos_exit() after queue is frozen.

Cc: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>