linux-kernel - Re: [PATCH v8 8/8] scsi: ufs: cleanup WriteBooster feature

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Date:   Fri, 8 May 2020 09:19:22 -0700
From:   "Asutosh Das (asd)" <asutoshd@...eaurora.org>
To:     Stanley Chu <stanley.chu@...iatek.com>, linux-scsi@...r.kernel.org,
        martin.petersen@...cle.com, avri.altman@....com,
        alim.akhtar@...sung.com, jejb@...ux.ibm.com
Cc:     beanhuo@...ron.com, cang@...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
Subject: Re: [PATCH v8 8/8] scsi: ufs: cleanup WriteBooster feature

On 5/8/2020 1:01 AM, Stanley Chu wrote:
> Small cleanup as below items,
> 
> 1. Use ufshcd_is_wb_allowed() directly instead of ufshcd_wb_sup()
>     since ufshcd_wb_sup() just returns the result of
>     ufshcd_is_wb_allowed().
> 
> 2. In ufshcd_suspend(), "else if (!ufshcd_is_runtime_pm(pm_op))
>     can be simplified to "else" since both have the same meaning.
> 
> This patch does not change any functionality.
> 
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
> Reviewed-by: Avri Altman <avri.altman@....com>
> ---

The whole series looks good to me.

Reviewed-by: Asutosh Das <asutoshd@...eaurora.org>

>   drivers/scsi/ufs/ufshcd.c | 20 +++++++-------------
>   1 file changed, 7 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index b6a0d77d47ac..426073a518ef 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -253,7 +253,6 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, bool scale_up);
>   static irqreturn_t ufshcd_intr(int irq, void *__hba);
>   static int ufshcd_change_power_mode(struct ufs_hba *hba,
>   			     struct ufs_pa_layer_attr *pwr_mode);
> -static bool ufshcd_wb_sup(struct ufs_hba *hba);
>   static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba);
>   static int ufshcd_wb_buf_flush_disable(struct ufs_hba *hba);
>   static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable);
> @@ -285,7 +284,7 @@ static inline void ufshcd_wb_config(struct ufs_hba *hba)
>   {
>   	int ret;
>   
> -	if (!ufshcd_wb_sup(hba))
> +	if (!ufshcd_is_wb_allowed(hba))
>   		return;
>   
>   	ret = ufshcd_wb_ctrl(hba, true);
> @@ -5197,18 +5196,13 @@ static void ufshcd_bkops_exception_event_handler(struct ufs_hba *hba)
>   				__func__, err);
>   }
>   
> -static bool ufshcd_wb_sup(struct ufs_hba *hba)
> -{
> -	return ufshcd_is_wb_allowed(hba);
> -}
> -
>   static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable)
>   {
>   	int ret;
>   	u8 index;
>   	enum query_opcode opcode;
>   
> -	if (!ufshcd_wb_sup(hba))
> +	if (!ufshcd_is_wb_allowed(hba))
>   		return 0;
>   
>   	if (!(enable ^ hba->wb_enabled))
> @@ -5264,7 +5258,7 @@ static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba)
>   	int ret;
>   	u8 index;
>   
> -	if (!ufshcd_wb_sup(hba) || hba->wb_buf_flush_enabled)
> +	if (!ufshcd_is_wb_allowed(hba) || hba->wb_buf_flush_enabled)
>   		return 0;
>   
>   	index = ufshcd_wb_get_flag_index(hba);
> @@ -5286,7 +5280,7 @@ static int ufshcd_wb_buf_flush_disable(struct ufs_hba *hba)
>   	int ret;
>   	u8 index;
>   
> -	if (!ufshcd_wb_sup(hba) || !hba->wb_buf_flush_enabled)
> +	if (!ufshcd_is_wb_allowed(hba) || !hba->wb_buf_flush_enabled)
>   		return 0;
>   
>   	index = ufshcd_wb_get_flag_index(hba);
> @@ -5336,7 +5330,7 @@ static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
>   	int ret;
>   	u32 avail_buf;
>   
> -	if (!ufshcd_wb_sup(hba))
> +	if (!ufshcd_is_wb_allowed(hba))
>   		return false;
>   	/*
>   	 * The ufs device needs the vcc to be ON to flush.
> @@ -8235,12 +8229,12 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
>   		 * configured WB type is 70% full, keep vcc ON
>   		 * for the device to flush the wb buffer
>   		 */
> -		if ((hba->auto_bkops_enabled && ufshcd_wb_sup(hba)) ||
> +		if ((hba->auto_bkops_enabled && ufshcd_is_wb_allowed(hba)) ||
>   		    ufshcd_wb_keep_vcc_on(hba))
>   			hba->dev_info.keep_vcc_on = true;
>   		else
>   			hba->dev_info.keep_vcc_on = false;
> -	} else if (!ufshcd_is_runtime_pm(pm_op)) {
> +	} else {
>   		hba->dev_info.keep_vcc_on = false;
>   	}
>   
> 


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