linux-kernel - Re: [PATCH v26 4/4] scsi: ufs: Add HPB 2.0 support

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Date:   Thu, 04 Mar 2021 16:37:21 +0800
From:   Can Guo <cang@...eaurora.org>
To:     Bean Huo <huobean@...il.com>
Cc:     daejun7.park@...sung.com, Greg KH <gregkh@...uxfoundation.org>,
        avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, asutoshd@...eaurora.org,
        stanley.chu@...iatek.com, bvanassche@....org,
        ALIM AKHTAR <alim.akhtar@...sung.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        JinHwan Park <jh.i.park@...sung.com>,
        Javier Gonzalez <javier.gonz@...sung.com>,
        SEUNGUK SHIN <seunguk.shin@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        BoRam Shin <boram.shin@...sung.com>
Subject: Re: [PATCH v26 4/4] scsi: ufs: Add HPB 2.0 support

On 2021-03-03 22:50, Bean Huo wrote:
> On Wed, 2021-03-03 at 15:29 +0900, Daejun Park wrote:
>> +
>> +static inline void ufshpb_put_pre_req(struct ufshpb_lu *hpb,
>> +                                     struct ufshpb_req *pre_req)
>> +{
>> +       pre_req->req = NULL;
>> +       pre_req->bio = NULL;
>> +       list_add_tail(&pre_req->list_req, &hpb->lh_pre_req_free);
>> +       hpb->num_inflight_pre_req--;
>> +}
>> +
>> +static void ufshpb_pre_req_compl_fn(struct request *req,
>> blk_status_t error)
>> +{
>> +       struct ufshpb_req *pre_req = (struct ufshpb_req *)req-
>> >end_io_data;
>> +       struct ufshpb_lu *hpb = pre_req->hpb;
>> +       unsigned long flags;
>> +       struct scsi_sense_hdr sshdr;
>> +
>> +       if (error) {
>> +               dev_err(&hpb->sdev_ufs_lu->sdev_dev, "block status
>> %d", error);
>> +               scsi_normalize_sense(pre_req->sense,
>> SCSI_SENSE_BUFFERSIZE,
>> +                                    &sshdr);
>> +               dev_err(&hpb->sdev_ufs_lu->sdev_dev,
>> +                       "code %x sense_key %x asc %x ascq %x",
>> +                       sshdr.response_code,
>> +                       sshdr.sense_key, sshdr.asc, sshdr.ascq);
>> +               dev_err(&hpb->sdev_ufs_lu->sdev_dev,
>> +                       "byte4 %x byte5 %x byte6 %x additional_len
>> %x",
>> +                       sshdr.byte4, sshdr.byte5,
>> +                       sshdr.byte6, sshdr.additional_length);
>> +       }
> 
> 
> How can you print out sense_key and sense code here? sense code will
> not be copied to pre_req->sense. you should directly use
> scsi_request->sense or let pre_req->sense point to scsi_request->sense.
> 
> You update the new version patch so quickly. In another word, I am
> wondering if you tested your patch before submitting?
> 
> Bean

Bean is right about the sense buffer...