On Fri, 23 Apr 2021 17:20:15 -0700, Asutosh Das wrote:
> This patch attempts to fix a deadlock in ufs while sending SSU.
> Recently, blk_queue_enter() added a check to not process requests if the
> queue is suspended. That leads to a resume of the associated device which
> is suspended. In ufs, that device is ufs device wlun and it's parent is
> ufs_hba. This resume tries to resume ufs device wlun which in turn tries
> to resume ufs_hba, which is already in the process of suspending, thus
> causing a deadlock.
>
> [...]
Applied to 5.14/scsi-queue, thanks!
[1/2] scsi: ufs: Enable power management for wlun
https://git.kernel.org/mkp/scsi/c/b294ff3e3449
[2/2] ufs: sysfs: Resume the proper scsi device
https://git.kernel.org/mkp/scsi/c/aef80fd1da32
--
Martin K. Petersen Oracle Linux Engineering
