linux-kernel - Re: [PATCH 13/50] pinctrl: mtk-common: Use devm_pinctrl

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Date:	Wed, 24 Feb 2016 12:28:25 -0800
From:	Hongzhou Yang <hongzhou.yang@...iatek.com>
To:	Laxman Dewangan <ldewangan@...dia.com>
CC:	<linus.walleij@...aro.org>, <corbet@....net>, <lee@...nel.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-gpio@...r.kernel.org>,
	<linux-rpi-kernel@...ts.infradead.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<bcm-kernel-feedback-list@...adcom.com>,
	<linux-mediatek@...ts.infradead.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>
Subject: Re: [PATCH 13/50] pinctrl: mtk-common: Use devm_pinctrl_register()
 for pinctrl registration

On Wed, 2016-02-24 at 18:45 +0530, Laxman Dewangan wrote:
> Use devm_pinctrl_register() for pin control registration and clean
> the error path.
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> Cc: Matthias Brugger <matthias.bgg@...il.com>
> Cc: Hongzhou Yang <hongzhou.yang@...iatek.com>
> Cc: Yingjoe Chen <yingjoe.chen@...iatek.com>
> ---

Acked-by: Hongzhou Yang <hongzhou.yang@...iatek.com>

Thanks,
Hongzhou

>  drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 17 ++++++-----------
>  1 file changed, 6 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> index ddc9217..194413d 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> @@ -1390,17 +1390,16 @@ int mtk_pctrl_init(struct platform_device *pdev,
>  	pctl->pctl_desc.pmxops = &mtk_pmx_ops;
>  	pctl->dev = &pdev->dev;
>  
> -	pctl->pctl_dev = pinctrl_register(&pctl->pctl_desc, &pdev->dev, pctl);
> +	pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
> +					       pctl);
>  	if (IS_ERR(pctl->pctl_dev)) {
>  		dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
>  		return PTR_ERR(pctl->pctl_dev);
>  	}
>  
>  	pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
> -	if (!pctl->chip) {
> -		ret = -ENOMEM;
> -		goto pctrl_error;
> -	}
> +	if (!pctl->chip)
> +		return -ENOMEM;
>  
>  	*pctl->chip = mtk_gpio_chip;
>  	pctl->chip->ngpio = pctl->devdata->npins;
> @@ -1409,10 +1408,8 @@ int mtk_pctrl_init(struct platform_device *pdev,
>  	pctl->chip->base = -1;
>  
>  	ret = gpiochip_add_data(pctl->chip, pctl);
> -	if (ret) {
> -		ret = -EINVAL;
> -		goto pctrl_error;
> -	}
> +	if (ret)
> +		return -EINVAL;
>  
>  	/* Register the GPIO to pin mappings. */
>  	ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
> @@ -1490,8 +1487,6 @@ int mtk_pctrl_init(struct platform_device *pdev,
>  
>  chip_error:
>  	gpiochip_remove(pctl->chip);
> -pctrl_error:
> -	pinctrl_unregister(pctl->pctl_dev);
>  	return ret;
>  }
>