linux-kernel - Re: [PATCH] pwm: imx27: Eliminate error message for defer probe

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Date:   Mon, 30 Dec 2019 13:54:54 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Anson Huang <Anson.Huang@....com>
Cc:     thierry.reding@...il.com, 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] pwm: imx27: Eliminate error message for defer probe

On Mon, Dec 30, 2019 at 11:02:40AM +0800, Anson Huang wrote:
> For defer probe error, no need to output error message which
> will cause confusion.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  drivers/pwm/pwm-imx27.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c
> index 59d8b12..35a7ac42 100644
> --- a/drivers/pwm/pwm-imx27.c
> +++ b/drivers/pwm/pwm-imx27.c
> @@ -319,9 +319,13 @@ static int pwm_imx27_probe(struct platform_device *pdev)
>  
>  	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);
> +		int ret = PTR_ERR(imx->clk_ipg);
> +
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(&pdev->dev,
> +				"getting ipg clock failed with %d\n",
> +				ret);

While you touch this part, you could convert to %pe to get a more
expressive error message.

But even independent of this the patch is fine, so

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/ |