On Tue, 5 May 2020 21:55:35 -0700, Can Guo wrote:
> During system resume, scsi_resume_device() decreases a request queue's
> pm_only counter if the scsi device was quiesced before. But after that,
> if the scsi device's RPM status is RPM_SUSPENDED, the pm_only counter is
> still held (non-zero). Current scsi resume hook only sets the RPM status
> of the scsi device and its request queue to RPM_ACTIVE, but leaves the
> pm_only counter unchanged. This may make the request queue's pm_only
> counter remain non-zero after resume hook returns, hence those who are
> waiting on the mq_freeze_wq would never be woken up. Fix this by calling
> blk_post_runtime_resume() if a sdev's RPM status was RPM_SUSPENDED.
>
> [...]
Applied to 5.7/scsi-queue, thanks!
[1/1] scsi: pm: Balance pm_only counter of request queue during system resume
https://git.kernel.org/mkp/scsi/c/a3b923842626
--
Martin K. Petersen Oracle Linux Engineering
