linux-kernel - Re: [PATCH -next] usb: musb: mediatek: Simplify code with dev_err

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Message-ID: <1cda7882-56e2-445f-b3cf-0366236250e6@wanadoo.fr>
Date: Sat, 7 Sep 2024 07:17:56 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: linruifeng4@...wei.com
Cc: angelogioacchino.delregno@...labora.com, b-liu@...com,
 gregkh@...uxfoundation.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
 linux-usb@...r.kernel.org, matthias.bgg@...il.com
Subject: Re: [PATCH -next] usb: musb: mediatek: Simplify code with
 dev_err_probe()

Le 07/09/2024 à 05:42, Lin Ruifeng a écrit :
> The combination of dev_err() and the returned error code could be
> replaced by dev_err_probe() in driver's probe function. Let's,
> converting to dev_err_probe() to make code more simple.
> 
> Signed-off-by: Lin Ruifeng <linruifeng4-hv44wF8Li93QT0dZR+AlfA@...lic.gmane.org>
> ---
>   drivers/usb/musb/mediatek.c | 27 +++++++++++----------------
>   1 file changed, 11 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c
> index 0a35aab3ab81..393b909de238 100644
> --- a/drivers/usb/musb/mediatek.c
> +++ b/drivers/usb/musb/mediatek.c
> @@ -416,10 +416,9 @@ static int mtk_musb_probe(struct platform_device *pdev)
>   		return -ENOMEM;
>   
>   	ret = of_platform_populate(np, NULL, NULL, dev);
> -	if (ret) {
> -		dev_err(dev, "failed to create child devices at %p\n", np);
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				"failed to create child devices at %p\n", np);
>   
>   	ret = mtk_musb_clks_get(glue);
>   	if (ret)
> @@ -448,23 +447,19 @@ static int mtk_musb_probe(struct platform_device *pdev)
>   		glue->role = USB_ROLE_NONE;
>   		break;
>   	default:
> -		dev_err(&pdev->dev, "Error 'dr_mode' property\n");
> -		return -EINVAL;
> +		return dev_err_probe(&pdev->dev, -EINVAL,
> +				"failed to create child devices at %p\n", np);

This message is wrong.
You made a cut'n'paste of the previous one.

>   	}
>   
>   	glue->phy = devm_of_phy_get_by_index(dev, np, 0);
> -	if (IS_ERR(glue->phy)) {
> -		dev_err(dev, "fail to getting phy %ld\n",
> -			PTR_ERR(glue->phy));
> -		return PTR_ERR(glue->phy);
> -	}
> +	if (IS_ERR(glue->phy))
> +		return dev_err_probe(dev, PTR_ERR(glue->phy),
> +				"fail to getting phy\n");

While a it, change it to "failed to get phy"?

>   
>   	glue->usb_phy = usb_phy_generic_register();
> -	if (IS_ERR(glue->usb_phy)) {
> -		dev_err(dev, "fail to registering usb-phy %ld\n",
> -			PTR_ERR(glue->usb_phy));
> -		return PTR_ERR(glue->usb_phy);
> -	}
> +	if (IS_ERR(glue->usb_phy))
> +		return dev_err_probe(dev, PTR_ERR(glue->usb_phy),
> +				"fail to registering usb-phy\n");

While a it, change it to "failed to register usb-phy"?

CJ

>   
>   	glue->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
>   	if (IS_ERR(glue->xceiv)) {