linux-kernel - Re: [PATCH v4 1/7] scsi: ufs: wb: Move ufshcd_is_wb

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Message-ID: <dfcd22985fde6fe8a8a00bfb2a9c8ee43f92e34b.camel@gmail.com>
Date:   Wed, 27 Jul 2022 15:16:18 +0200
From:   Bean Huo <huobean@...il.com>
To:     j-young.choi@...sung.com, ALIM AKHTAR <alim.akhtar@...sung.com>,
        "avri.altman@....com" <avri.altman@....com>,
        "bvanassche@....org" <bvanassche@....org>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/7] scsi: ufs: wb: Move ufshcd_is_wb_allowed() to
 callee

On Wed, 2022-07-27 at 16:04 +0900, Jinyoung CHOI wrote:
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index 8f11f118c30e..a3bdf9986511 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -5722,6 +5722,9 @@ static int __ufshcd_wb_toggle(struct ufs_hba
> *hba, bool set, enum flag_idn idn)
>         enum query_opcode opcode = set ? UPIU_QUERY_OPCODE_SET_FLAG :
>                                    UPIU_QUERY_OPCODE_CLEAR_FLAG;
>  
> +       if (!ufshcd_is_wb_allowed(hba))
> +               return -EPERM;
> +
Hi J-young,

here you should change its return, Otherwise, there will be an fake
error printing:

        dev_err(hba->dev, "%s Write Booster %s failed %d\n",          
                        __func__, enable ? "enable" : "disable", ret);


Kind regards,
Bean