linux-kernel - Re: [PATCH v31 2/4] scsi: ufs: L2P map management for HPB read

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Date:   Mon, 22 Mar 2021 10:11:47 +0100
From:   Bean Huo <huobean@...il.com>
To:     daejun7.park@...sung.com, Greg KH <gregkh@...uxfoundation.org>,
        "avri.altman@....com" <avri.altman@....com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "bvanassche@....org" <bvanassche@....org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        ALIM AKHTAR <alim.akhtar@...sung.com>,
        JinHwan Park <jh.i.park@...sung.com>,
        Javier Gonzalez <javier.gonz@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        Dukhyun Kwon <d_hyun.kwon@...sung.com>,
        Keoseong Park <keosung.park@...sung.com>,
        Jaemyung Lee <jaemyung.lee@...sung.com>,
        Jieon Seol <jieon.seol@...sung.com>
Subject: Re: [PATCH v31 2/4] scsi: ufs: L2P map management for HPB read

On Mon, 2021-03-22 at 15:54 +0900, Daejun Park wrote:
> +       switch (rsp_field->hpb_op) {
> 
> +       case HPB_RSP_REQ_REGION_UPDATE:
> 
> +               if (data_seg_len != DEV_DATA_SEG_LEN)
> 
> +                       dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
> 
> +                                "%s: data seg length is not
> same.\n",
> 
> +                                __func__);
> 
> +               ufshpb_rsp_req_region_update(hpb, rsp_field);
> 
> +               break;
> 
> +       case HPB_RSP_DEV_RESET:
> 
> +               dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
> 
> +                        "UFS device lost HPB information during
> PM.\n");
> 
> +               break;

Hi Deajun,
This series looks good to me. Just here I have one question. You didn't
handle HPB_RSP_DEV_RESET, just a warning.  Based on your SS UFS, how to
handle HPB_RSP_DEV_RESET from the host side? Do you think we shoud
reset host side HPB entry as well or what else?


Bean