linux-kernel - Re: [PATCH net-next v3] mfd: pm8008: Fix return value check in pm8008

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Date:   Sat, 5 Jun 2021 22:33:44 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Yang Yingliang <yangyingliang@...wei.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        lee.jones@...aro.org, agross@...nel.org, gurus@...eaurora.org,
        dmitry.baryshkov@...aro.org
Subject: Re: [PATCH net-next v3] mfd: pm8008: Fix return value check in
 pm8008_probe()

On Fri 04 Jun 21:24 CDT 2021, Yang Yingliang wrote:

> In case of error, the function devm_regmap_init_i2c() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value check
> should be replaced with IS_ERR().
> 
> Fixes: 6b149f3310a4 ("mfd: pm8008: Add driver for QCOM PM8008 PMIC")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>

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

> ---
> v3:
>   return PTR_ERR(chip->regmap) instead of ENODEV
> ---
>  drivers/mfd/qcom-pm8008.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mfd/qcom-pm8008.c b/drivers/mfd/qcom-pm8008.c
> index c472d7f8103c..fb8915a682ad 100644
> --- a/drivers/mfd/qcom-pm8008.c
> +++ b/drivers/mfd/qcom-pm8008.c
> @@ -228,8 +228,8 @@ static int pm8008_probe(struct i2c_client *client)
>  
>  	chip->dev = &client->dev;
>  	chip->regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg);
> -	if (!chip->regmap)
> -		return -ENODEV;
> +	if (IS_ERR(chip->regmap))
> +		return PTR_ERR(chip->regmap);
>  
>  	i2c_set_clientdata(client, chip);
>  
> -- 
> 2.25.1
>