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

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Message-ID: <SN6PR04MB46407A85C194D2D8F03A01B3FC820@SN6PR04MB4640.namprd04.prod.outlook.com>
Date:   Tue, 9 Jun 2020 06:39:07 +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

> > > +       switch (rsp_field->hpb_type) {
> > > +       case HPB_RSP_REQ_REGION_UPDATE:
> > > +               WARN_ON(data_seg_len != DEV_DATA_SEG_LEN);
> > > +               ufshpb_rsp_req_region_update(hpb, rsp_field);
> > > +               break;
> > What about hpb dev reset - oper 0x2?
> Yes, I will change.
The spec does not define what the host should do in this case,
e.g. when the device informs it that the entire db is no longer valid.
What are you planning to do?