linux-kernel - RE: [PATCH v2 2/2] scsi: ufs: Add trace event for UIC commands

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Date:   Mon, 15 Jun 2020 07:13:04 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Stanley Chu <stanley.chu@...iatek.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "alim.akhtar@...sung.com" <alim.akhtar@...sung.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>
CC:     "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kuohong.wang@...iatek.com" <kuohong.wang@...iatek.com>,
        "peter.wang@...iatek.com" <peter.wang@...iatek.com>,
        "chun-hung.wu@...iatek.com" <chun-hung.wu@...iatek.com>,
        "andy.teng@...iatek.com" <andy.teng@...iatek.com>,
        "cc.chou@...iatek.com" <cc.chou@...iatek.com>,
        "chaotian.jing@...iatek.com" <chaotian.jing@...iatek.com>
Subject: RE: [PATCH v2 2/2] scsi: ufs: Add trace event for UIC commands

>         /* Write UIC Cmd */
>         ufshcd_writel(hba, uic_cmd->command & COMMAND_OPCODE_MASK,
>                       REG_UIC_COMMAND);
> @@ -4825,11 +4847,15 @@ static irqreturn_t ufshcd_uic_cmd_compl(struct
> ufs_hba *hba, u32 intr_status)
>                         ufshcd_get_uic_cmd_result(hba);
>                 hba->active_uic_cmd->argument3 =
>                         ufshcd_get_dme_attr_val(hba);
> +               ufshcd_add_uic_command_trace(hba, hba->active_uic_cmd,
> +                                            "complete");
>                 complete(&hba->active_uic_cmd->done);
>                 retval = IRQ_HANDLED;
>         }
> 
>         if ((intr_status & UFSHCD_UIC_PWR_MASK) && hba->uic_async_done) {
> +               ufshcd_add_uic_command_trace(hba, hba->active_uic_cmd,
> +                                            "complete");
>                 complete(hba->uic_async_done);
>                 retval = IRQ_HANDLED;


Why not call ufshcd_add_uic_command_trace once if retval == IRQ_HANDLED?
Is it that the exact timestamp?