On Fri, 2018-08-03 at 07:53 +0800, Ming Lei wrote: > blk_pm_add_request() calls pm_request_resume() for waking up device, but > it is wrong because it is async request, which can't guarantee device > will be ready before calling .queue_rq().
That's a longstanding issue and not something that has been introduced by this patch series. Hence patch 6/9 that issues a warning if pm_request_resume() would be called. Bart.
