linux-kernel - Re: [PATCH v2 2/2] scsi: ufs: Relax the condition of UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH

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Message-ID: <948718782f2a1f82b3c6de964a37f8ac@codeaurora.org>
Date:   Tue, 22 Dec 2020 19:34:06 +0800
From:   Can Guo <cang@...eaurora.org>
To:     Stanley Chu <stanley.chu@...iatek.com>
Cc:     linux-scsi@...r.kernel.org, martin.petersen@...cle.com,
        avri.altman@....com, alim.akhtar@...sung.com, jejb@...ux.ibm.com,
        beanhuo@...ron.com, asutoshd@...eaurora.org,
        matthias.bgg@...il.com, bvanassche@....org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kuohong.wang@...iatek.com, peter.wang@...iatek.com,
        chun-hung.wu@...iatek.com, andy.teng@...iatek.com,
        chaotian.jing@...iatek.com, cc.chou@...iatek.com,
        jiajie.hao@...iatek.com, alice.chao@...iatek.com
Subject: Re: [PATCH v2 2/2] scsi: ufs: Relax the condition of
 UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL

On 2020-12-22 15:29, Stanley Chu wrote:
> UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL is aimed to skip enabling
> fWriteBoosterBufferFlushEn while WriteBooster is initializing.
> Therefore it is better to apply the checking during WriteBooster
> initialization only.
> 
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
> ---
>  drivers/scsi/ufs/ufshcd.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 9d61dc3eb842..e50b19925236 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -289,7 +289,8 @@ static inline void ufshcd_wb_config(struct ufs_hba 
> *hba)
>  	if (ret)
>  		dev_err(hba->dev, "%s: En WB flush during H8: failed: %d\n",
>  			__func__, ret);
> -	ufshcd_wb_toggle_flush(hba, true);
> +	if (!(hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL))
> +		ufshcd_wb_toggle_flush(hba, true);
>  }
> 
>  static void ufshcd_scsi_unblock_requests(struct ufs_hba *hba)
> @@ -5401,9 +5402,6 @@ static int
> ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set)
> 
>  static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool 
> enable)
>  {
> -	if (hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL)
> -		return;
> -
>  	if (enable)
>  		ufshcd_wb_buf_flush_enable(hba);
>  	else

Thanks for the change, I was thinking about the same.

Reviewed-by: Can Guo <cang@...eaurora.org>