linux-kernel - RE: [PATCH v1 2/3] scsi: ufs: Distinguish between TM request UPIU and response UPIU in TM UPIU trace

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Date:   Mon, 7 Dec 2020 07:49:38 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Bean Huo <huobean@...il.com>,
        "alim.akhtar@...sung.com" <alim.akhtar@...sung.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "tomas.winkler@...el.com" <tomas.winkler@...el.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>
Subject: RE: [PATCH v1 2/3] scsi: ufs: Distinguish between TM request UPIU and
 response UPIU in TM UPIU trace

> 
> 
> From: Bean Huo <beanhuo@...ron.com>
> 
> Distinguish between TM request UPIU and response UPIU in TM UPIU trace,
> for the TM response, let TM UPIU trace print its TM response UPIU.
> 
> Signed-off-by: Bean Huo <beanhuo@...ron.com>
Acked-by: Avri Altman <avri.altman@....com>

Again - same comment:
But you need to change the complete string so not to break the current parsers.
I would also pass to the  struct utp_upiu_header *,
so no comparison is needed.

Thanks,
Avri

> ---
>  drivers/scsi/ufs/ufshcd.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index e10de94adb3f..29d7240a61bf 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -338,8 +338,12 @@ static void ufshcd_add_tm_upiu_trace(struct
> ufs_hba *hba, unsigned int tag,
>         int off = (int)tag - hba->nutrs;
>         struct utp_task_req_desc *descp = &hba->utmrdl_base_addr[off];
> 
> -       trace_ufshcd_upiu(dev_name(hba->dev), str, &descp->req_header,
> -                       &descp->input_param1);
> +       if (!strcmp("tm_send", str))
> +               trace_ufshcd_upiu(dev_name(hba->dev), str, &descp-
> >req_header,
> +                                 &descp->input_param1);
> +       else
> +               trace_ufshcd_upiu(dev_name(hba->dev), str, &descp-
> >rsp_header,
> +                                 &descp->output_param1);
>  }
> 
>  static void ufshcd_add_uic_command_trace(struct ufs_hba *hba,
> --
> 2.17.1