linux-kernel - Re: [PATCH V2 3/3] pwm: imx1: Use dev_err

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Date:   Tue, 11 Aug 2020 08:58:38 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Anson Huang <Anson.Huang@....com>
Cc:     thierry.reding@...il.com, lee.jones@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-pwm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Linux-imx@....com
Subject: Re: [PATCH V2 3/3] pwm: imx1: Use dev_err_probe() to simplify error
 handling

On Tue, Aug 11, 2020 at 02:24:32PM +0800, Anson Huang wrote:
> dev_err_probe() can reduce code size, uniform error handling and record the
> defer probe reason etc., use it to simplify the code.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> changes since V1:
> 	- remove redundant return value print.
> ---
>  drivers/pwm/pwm-imx1.c | 21 ++++++---------------
>  1 file changed, 6 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-imx1.c b/drivers/pwm/pwm-imx1.c
> index f8b2c2e..4877734 100644
> --- a/drivers/pwm/pwm-imx1.c
> +++ b/drivers/pwm/pwm-imx1.c
> @@ -145,23 +145,14 @@ static int pwm_imx1_probe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, imx);
>  
>  	imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
> -	if (IS_ERR(imx->clk_ipg)) {
> -		dev_err(&pdev->dev, "getting ipg clock failed with %ld\n",
> -				PTR_ERR(imx->clk_ipg));
> -		return PTR_ERR(imx->clk_ipg);
> -	}
> +	if (IS_ERR(imx->clk_ipg))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(imx->clk_ipg),
> +				     "getting ipg clock failed\n");
>  
>  	imx->clk_per = devm_clk_get(&pdev->dev, "per");
> -	if (IS_ERR(imx->clk_per)) {
> -		int ret = PTR_ERR(imx->clk_per);
> -
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(&pdev->dev,
> -				"failed to get peripheral clock: %d\n",
> -				ret);
> -
> -		return ret;
> -	}
> +	if (IS_ERR(imx->clk_per))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(imx->clk_per),
> +				     "failed to get peripheral clock\n");

Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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