linux-kernel - Re: [RFC 18/42] drivers/pinctrl: don't check resource with devm_ioremap

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Date:	Fri, 10 May 2013 16:30:34 +0200
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC 18/42] drivers/pinctrl: don't check resource with
 devm_ioremap_resource

On 10:17 Fri 10 May     , Wolfram Sang wrote:
> devm_ioremap_resource does sanity checks on the given resource. No need to
> duplicate this in the driver.
> 
> Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
> ---
>  drivers/pinctrl/pinctrl-at91.c       |    7 +------
for at91
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>

>  drivers/pinctrl/pinctrl-coh901.c     |    5 -----
>  drivers/pinctrl/pinctrl-exynos5440.c |    5 -----
>  drivers/pinctrl/pinctrl-samsung.c    |    5 -----
>  drivers/pinctrl/pinctrl-xway.c       |    4 ----
>  5 files changed, 1 insertion(+), 25 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
> index 5d7529e..b90a3a0 100644
> --- a/drivers/pinctrl/pinctrl-at91.c
> +++ b/drivers/pinctrl/pinctrl-at91.c
> @@ -1543,12 +1543,6 @@ static int at91_gpio_probe(struct platform_device *pdev)
>  		goto err;
>  	}
>  
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		ret = -ENOENT;
> -		goto err;
> -	}
> -
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0) {
>  		ret = irq;
> @@ -1561,6 +1555,7 @@ static int at91_gpio_probe(struct platform_device *pdev)
>  		goto err;
>  	}
>  
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	at91_chip->regbase = devm_ioremap_resource(&pdev->dev, res);
>  	if (IS_ERR(at91_chip->regbase)) {
>  		ret = PTR_ERR(at91_chip->regbase);
> diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c
> index edde3ac..a67af41 100644
> --- a/drivers/pinctrl/pinctrl-coh901.c
> +++ b/drivers/pinctrl/pinctrl-coh901.c
> @@ -713,11 +713,6 @@ static int __init u300_gpio_probe(struct platform_device *pdev)
>  	gpio->dev = &pdev->dev;
>  
>  	memres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!memres) {
> -		dev_err(gpio->dev, "could not get GPIO memory resource\n");
> -		return -ENODEV;
> -	}
> -
>  	gpio->base = devm_ioremap_resource(&pdev->dev, memres);
>  	if (IS_ERR(gpio->base))
>  		return PTR_ERR(gpio->base);
> diff --git a/drivers/pinctrl/pinctrl-exynos5440.c b/drivers/pinctrl/pinctrl-exynos5440.c
> index 6038503..32a48f4 100644
> --- a/drivers/pinctrl/pinctrl-exynos5440.c
> +++ b/drivers/pinctrl/pinctrl-exynos5440.c
> @@ -1000,11 +1000,6 @@ static int exynos5440_pinctrl_probe(struct platform_device *pdev)
>  	}
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		dev_err(dev, "cannot find IO resource\n");
> -		return -ENOENT;
> -	}
> -
>  	priv->reg_base = devm_ioremap_resource(&pdev->dev, res);
>  	if (IS_ERR(priv->reg_base))
>  		return PTR_ERR(priv->reg_base);
> diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c
> index 9763668..055d016 100644
> --- a/drivers/pinctrl/pinctrl-samsung.c
> +++ b/drivers/pinctrl/pinctrl-samsung.c
> @@ -932,11 +932,6 @@ static int samsung_pinctrl_probe(struct platform_device *pdev)
>  	drvdata->dev = dev;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		dev_err(dev, "cannot find IO resource\n");
> -		return -ENOENT;
> -	}
> -
>  	drvdata->virt_base = devm_ioremap_resource(&pdev->dev, res);
>  	if (IS_ERR(drvdata->virt_base))
>  		return PTR_ERR(drvdata->virt_base);
> diff --git a/drivers/pinctrl/pinctrl-xway.c b/drivers/pinctrl/pinctrl-xway.c
> index f2977cf..e92132c 100644
> --- a/drivers/pinctrl/pinctrl-xway.c
> +++ b/drivers/pinctrl/pinctrl-xway.c
> @@ -716,10 +716,6 @@ static int pinmux_xway_probe(struct platform_device *pdev)
>  
>  	/* get and remap our register range */
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		dev_err(&pdev->dev, "Failed to get resource\n");
> -		return -ENOENT;
> -	}
>  	xway_info.membase[0] = devm_ioremap_resource(&pdev->dev, res);
>  	if (IS_ERR(xway_info.membase[0]))
>  		return PTR_ERR(xway_info.membase[0]);
> -- 
> 1.7.10.4
> 
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