linux-kernel - Re: [PATCH v6 09/10] scsi: ufs: ufs-qcom: Check return value of phy_set_mode

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Date:   Thu, 30 Nov 2023 12:46:17 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Can Guo <quic_cang@...cinc.com>
Cc:     bvanassche@....org, adrian.hunter@...el.com, cmd4@...lcomm.com,
        beanhuo@...ron.com, avri.altman@....com, junwoo80.lee@...sung.com,
        martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 09/10] scsi: ufs: ufs-qcom: Check return value of
 phy_set_mode_ext()

On Wed, Nov 29, 2023 at 12:28:34AM -0800, Can Guo wrote:
> In ufs_qcom_power_up_sequence(), check return value of phy_set_mode_ext()
> and stop proceeding if phy_set_mode_ext() fails.
> 
> Signed-off-by: Can Guo <quic_cang@...cinc.com>
> ---
>  drivers/ufs/host/ufs-qcom.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 30f4ca6..9c0ebbc 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -475,7 +475,12 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
>  		return ret;
>  	}
>  
> -	phy_set_mode_ext(phy, mode, host->phy_gear);
> +	ret = phy_set_mode_ext(phy, mode, host->phy_gear);
> +	if (ret) {
> +		dev_err(hba->dev, "%s: phy set mode failed, ret = %d\n",
> +			__func__, ret);

No need to print the error message here as it is already done in the PHY driver.

Also, this patch should come before the PHY patch returning error.

- Mani

> +		goto out_disable_phy;
> +	}
>  
>  	/* power on phy - start serdes and phy's power and clocks */
>  	ret = phy_power_on(phy);
> -- 
> 2.7.4
> 
> 

-- 
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