linux-kernel - Re: [PATCH v2 1/1] ufs: mcq: qcom: Fix passing zero to PTR

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Date:   Wed, 1 Mar 2023 20:21:09 -0600
From:   Bjorn Andersson <andersson@...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,
        adrian.hunter@...el.com, bvanassche@....org, avri.altman@....com,
        mani@...nel.org, beanhuo@...ron.com, linux-arm-msm@...r.kernel.org,
        Andy Gross <agross@...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 v2 1/1] ufs: mcq: qcom: Fix passing zero to PTR_ERR

On Wed, Mar 01, 2023 at 05:41:06PM -0800, Asutosh Das wrote:
> Fix an error case in ufs_qcom_mcq_config_resource(), where the
> return value is set to 0 before passing it to PTR_ERR.
> 
> This led to Smatch warning:
> drivers/ufs/host/ufs-qcom.c:1455 ufs_qcom_mcq_config_resource() warn:
> passing zero to 'PTR_ERR'
> 
> Fixes: c263b4ef737e ("scsi: ufs: core: mcq: Configure resource regions")
> Reported-by: Dan Carpenter <error27@...il.com>
> Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>

Reviewed-by: Bjorn Andersson <andersson@...nel.org>

> 
> --
> v1 -> v2
> - Split to 2 patches
> - Addressed Mani's comments
> --
> ---
>  drivers/ufs/host/ufs-qcom.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 34fc453f3eb1..43b1fc1ad33e 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -1451,8 +1451,8 @@ static int ufs_qcom_mcq_config_resource(struct ufs_hba *hba)
>  		if (IS_ERR(res->base)) {
>  			dev_err(hba->dev, "Failed to map res %s, err=%d\n",
>  					 res->name, (int)PTR_ERR(res->base));
> -			res->base = NULL;
>  			ret = PTR_ERR(res->base);
> +			res->base = NULL;
>  			return ret;
>  		}
>  	}
> -- 
> 2.7.4
>