On Sat, Oct 27, 2018 at 12:01:09AM +0800, Jianchao Wang wrote:

Merge blk_mq_try_issue_directly and __blk_mq_try_issue_directly
into one interface which is able to handle the return value from
.queue_rq callback. Due to we can only issue directly w/o io
scheduler, so remove the blk_mq_get_driver_tag.

It isn't correct for dm-rq, see blk_insert_cloned_request().

Thanks,
Ming