On Fri, Aug 03, 2018 at 12:08:54AM +0000, Bart Van Assche wrote:

On Fri, 2018-08-03 at 07:53 +0800, Ming Lei wrote:

quoted

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.

It is introduced by your patch, please see blk_pm_allow_request().

Thanks,
Ming