RE: [RFC PATCH v3 0/1] Enable power management for ufs wlun

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> 
> 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.
> 
> This patch takes care of:
> * Suspending the ufs device lun only after all other luns are suspended
ufs device lun -> ufs device wlun





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