linux-kernel - Re: [PATCH v5 01/16] ufs: core: Optimize duplicate code to read extended feature

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Date:   Mon, 28 Nov 2022 17:50:18 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Asutosh Das <quic_asutoshd@...cinc.com>
Cc:     quic_cang@...cinc.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, quic_nguyenb@...cinc.com,
        quic_xiaosenh@...cinc.com, stanley.chu@...iatek.com,
        eddie.huang@...iatek.com, daejun7.park@...sung.com,
        bvanassche@....org, avri.altman@....com, beanhuo@...ron.com,
        linux-arm-msm@...r.kernel.org,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Jinyoung Choi <j-young.choi@...sung.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 01/16] ufs: core: Optimize duplicate code to read
 extended feature

On Tue, Nov 22, 2022 at 08:10:14PM -0800, Asutosh Das wrote:
> The code to parse the extended feature is duplicated twice
> in the ufs core. Replace the duplicated code with a
> function.
> 
> Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>

Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>

Thanks,
Mani

> Reviewed-by: Bart Van Assche <bvanassche@....org>
> ---
>  drivers/ufs/core/ufshcd.c | 21 +++++++++++++--------
>  1 file changed, 13 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index 768cb49..c9d7b78 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -215,6 +215,17 @@ ufs_get_desired_pm_lvl_for_dev_link_state(enum ufs_dev_pwr_mode dev_state,
>  	return UFS_PM_LVL_0;
>  }
>  
> +static unsigned int ufs_get_ext_ufs_feature(struct ufs_hba *hba,
> +					    const u8 *desc_buf)
> +{
> +	if (hba->desc_size[QUERY_DESC_IDN_DEVICE] <
> +	    DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP + 4)
> +		return 0;
> +
> +	return get_unaligned_be32(desc_buf +
> +				  DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
> +}
> +
>  static const struct ufs_dev_quirk ufs_fixups[] = {
>  	/* UFS cards deviations table */
>  	{ .wmanufacturerid = UFS_VENDOR_MICRON,
> @@ -7584,13 +7595,7 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, const u8 *desc_buf)
>  	     (hba->dev_quirks & UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES)))
>  		goto wb_disabled;
>  
> -	if (hba->desc_size[QUERY_DESC_IDN_DEVICE] <
> -	    DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP + 4)
> -		goto wb_disabled;
> -
> -	ext_ufs_feature = get_unaligned_be32(desc_buf +
> -					DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
> -
> +	ext_ufs_feature = ufs_get_ext_ufs_feature(hba, desc_buf);
>  	if (!(ext_ufs_feature & UFS_DEV_WRITE_BOOSTER_SUP))
>  		goto wb_disabled;
>  
> @@ -7644,7 +7649,7 @@ static void ufshcd_temp_notif_probe(struct ufs_hba *hba, const u8 *desc_buf)
>  	if (!(hba->caps & UFSHCD_CAP_TEMP_NOTIF) || dev_info->wspecversion < 0x300)
>  		return;
>  
> -	ext_ufs_feature = get_unaligned_be32(desc_buf + DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
> +	ext_ufs_feature = ufs_get_ext_ufs_feature(hba, desc_buf);
>  
>  	if (ext_ufs_feature & UFS_DEV_LOW_TEMP_NOTIF)
>  		mask |= MASK_EE_TOO_LOW_TEMP;
> -- 
> 2.7.4
> 

-- 
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