linux-kernel - RE: [RFC PATCH 4/5] scsi: ufs: L2P map management for HPB read

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Message-ID: <SN6PR04MB464062D306BA6D635F274CD4FC820@SN6PR04MB4640.namprd04.prod.outlook.com>
Date:   Tue, 9 Jun 2020 06:48:46 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     "daejun7.park@...sung.com" <daejun7.park@...sung.com>,
        ALIM AKHTAR <alim.akhtar@...sung.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "bvanassche@....org" <bvanassche@....org>,
        "tomas.winkler@...el.com" <tomas.winkler@...el.com>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Sang-yoon Oh <sangyoon.oh@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        yongmyung lee <ymhungry.lee@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        Adel Choi <adel.choi@...sung.com>,
        BoRam Shin <boram.shin@...sung.com>
Subject: RE: [RFC PATCH 4/5] scsi: ufs: L2P map management for HPB read

> > >                 dev_info(&hpb->hpb_lu_dev, "ufshpb resume");
> > >                 ufshpb_set_state(hpb, HPB_PRESENT);
> > > +               if (!ufshpb_is_empty_rsp_lists(hpb))
> > > +                       queue_work(ufshpb_drv.ufshpb_wq, &hpb->map_work);
> > Ahha - so you are using the ufs driver pm flows to poll your work queue.
> > Why device recommendations isn't enough?
> I don't understand this comment. The code resumes map_work that was
> stopped by PM during the map request.
> Please explain your concerns.
This is not a concern, just a question.
If a map request started while runtime/system suspend, can you share its flow?