linux-kernel - Re: [PATCH v3] pwm: rockchip: Convert to use dev_err

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Date:   Fri, 19 Aug 2022 10:22:35 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     zhaoxiao <zhaoxiao@...ontech.com>
Cc:     thierry.reding@...il.com, heiko@...ech.de,
        linux-pwm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] pwm: rockchip: Convert to use dev_err_probe()

On Fri, Aug 19, 2022 at 03:07:56PM +0800, zhaoxiao wrote:
> It's fine to call dev_err_probe() in ->probe() when error code is known.
> Convert the driver to use dev_err_probe().
> 
> Signed-off-by: zhaoxiao <zhaoxiao@...ontech.com>
> ---
>  v3: 1.There is no need to assign it to 'ret', and use PTR_ERR(pc->pclk) directly.
>      2.add the return before dev_err_probe().
>  drivers/pwm/pwm-rockchip.c | 14 ++++----------
>  1 file changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
> index f3647b317152..eda1bd49d260 100644
> --- a/drivers/pwm/pwm-rockchip.c
> +++ b/drivers/pwm/pwm-rockchip.c
> @@ -328,18 +328,12 @@ static int rockchip_pwm_probe(struct platform_device *pdev)
>  	else
>  		pc->pclk = pc->clk;
>  
> -	if (IS_ERR(pc->pclk)) {
> -		ret = PTR_ERR(pc->pclk);
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(&pdev->dev, "Can't get APB clk: %d\n", ret);
> -		return ret;
> -	}
> +	if (IS_ERR(pc->pclk))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(pc->pclk), "Can't get APB clk\n");
>  
>  	ret = clk_prepare_enable(pc->clk);
> -	if (ret) {
> -		dev_err(&pdev->dev, "Can't prepare enable PWM clk: %d\n", ret);
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(&pdev->dev, ret, "Can't prepare enable PWM clk\n");
>  
>  	ret = clk_prepare_enable(pc->pclk);
>  	if (ret) {

Still missing two dev_err() that are unconverted ...

Uwe

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

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