linux-kernel - Re: [PATCH 8/8] extcon: arizona: Use devm_extcon_dev

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Date:	Wed, 16 Apr 2014 19:44:25 +0900
From:	Seung-Woo Kim <sw0312.kim@...sung.com>
To:	Sangjung Woo <sangjung.woo@...sung.com>
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	linux-kernel@...r.kernel.org,
	Seung-Woo Kim <sw0312.kim@...sung.com>
Subject: Re: [PATCH 8/8] extcon: arizona: Use devm_extcon_dev_register()

Hi,

On 2014Гт 04Пљ 16РЯ 19:27, Sangjung Woo wrote:
> Use the resource-managed extcon device register function (i.e.
> devm_extcon_dev_register()) instead of extcon_dev_register(). If extcon device
> is attached with this function, that extcon device is automatically unregistered
> on driver detach. That reduces tiresome managing code.
> 
> Signed-off-by: Sangjung Woo <sangjung.woo@...sung.com>
> ---
>  drivers/extcon/extcon-arizona.c |   13 ++++---------
>  1 file changed, 4 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
> index 98a14f6..40e6c0b 100644
> --- a/drivers/extcon/extcon-arizona.c
> +++ b/drivers/extcon/extcon-arizona.c
> @@ -1105,15 +1105,13 @@ static int arizona_extcon_probe(struct platform_device *pdev)
>  	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
>  	if (!info) {
>  		dev_err(&pdev->dev, "Failed to allocate memory\n");
> -		ret = -ENOMEM;
> -		goto err;
> +		return -ENOMEM;
>  	}
>  
>  	info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
>  	if (IS_ERR(info->micvdd)) {
> -		ret = PTR_ERR(info->micvdd);
>  		dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);

Assignment to ret is removed but it is still used here.

> -		goto err;
> +		return PTR_ERR(info->micvdd);
>  	}
>  
>  	mutex_init(&info->lock);
> @@ -1155,11 +1153,11 @@ static int arizona_extcon_probe(struct platform_device *pdev)
>  	info->edev.dev.parent = arizona->dev;
>  	info->edev.supported_cable = arizona_cable;
>  
> -	ret = extcon_dev_register(&info->edev);
> +	ret = devm_extcon_dev_register(&pdev->dev, &info->edev);
>  	if (ret < 0) {
>  		dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
>  			ret);
> -		goto err;
> +		return ret;
>  	}
>  
>  	info->input = devm_input_allocate_device(&pdev->dev);
> @@ -1410,8 +1408,6 @@ err_rise:
>  err_input:
>  err_register:
>  	pm_runtime_disable(&pdev->dev);
> -	extcon_dev_unregister(&info->edev);
> -err:
>  	return ret;
>  }
>  
> @@ -1445,7 +1441,6 @@ static int arizona_extcon_remove(struct platform_device *pdev)
>  	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
>  			   ARIZONA_JD1_ENA, 0);
>  	arizona_clk32k_disable(arizona);
> -	extcon_dev_unregister(&info->edev);
>  
>  	return 0;
>  }
> 

-- 
Seung-Woo Kim
Samsung Software R&D Center
--

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