linux-kernel - Re: [PATCH] leds: leds-fsg: Use devm_led_class

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Message-id: <5624A04A.6060209@samsung.com>
Date:	Mon, 19 Oct 2015 09:48:26 +0200
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	Muhammad Falak R Wani <falakreyaz@...il.com>
Cc:	Anreas Werner <andreas.werner@....de>,
	Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>, linux-leds@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] leds: leds-fsg: Use devm_led_class_register

Hi Muhammad,

On 10/17/2015 01:13 AM, Muhammad Falak R Wani wrote:
> Use resource-managed function devm_led_classdev_register, remove
> redundant function fsg_led_remove.
> Drop unneeded gotos to make the _init code flow clean.
>
> Signed-off-by: Muhammad Falak R Wani <falakreyaz@...il.com>
> ---
>   drivers/leds/leds-fsg.c | 52 ++++++++++++-------------------------------------
>   1 file changed, 12 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/leds/leds-fsg.c b/drivers/leds/leds-fsg.c
> index 2b4dc73..cb01f5e 100644
> --- a/drivers/leds/leds-fsg.c
> +++ b/drivers/leds/leds-fsg.c
> @@ -156,63 +156,35 @@ static int fsg_led_probe(struct platform_device *pdev)
>   	latch_value = 0xffff;
>   	*latch_address = latch_value;
>
> -	ret = led_classdev_register(&pdev->dev, &fsg_wlan_led);
> +	ret = devm_led_classdev_register(&pdev->dev, &fsg_wlan_led);
>   	if (ret < 0)
> -		goto failwlan;
> +		return ret;
>
> -	ret = led_classdev_register(&pdev->dev, &fsg_wan_led);
> +	ret = devm_led_classdev_register(&pdev->dev, &fsg_wan_led);
>   	if (ret < 0)
> -		goto failwan;
> +		return ret;
>
> -	ret = led_classdev_register(&pdev->dev, &fsg_sata_led);
> +	ret = devm_led_classdev_register(&pdev->dev, &fsg_sata_led);
>   	if (ret < 0)
> -		goto failsata;
> +		return ret;
>
> -	ret = led_classdev_register(&pdev->dev, &fsg_usb_led);
> +	ret = devm_led_classdev_register(&pdev->dev, &fsg_usb_led);
>   	if (ret < 0)
> -		goto failusb;
> +		return ret;
>
> -	ret = led_classdev_register(&pdev->dev, &fsg_sync_led);
> +	ret = devm_led_classdev_register(&pdev->dev, &fsg_sync_led);
>   	if (ret < 0)
> -		goto failsync;
> +		return ret;
>
> -	ret = led_classdev_register(&pdev->dev, &fsg_ring_led);
> +	ret = devm_led_classdev_register(&pdev->dev, &fsg_ring_led);
>   	if (ret < 0)
> -		goto failring;
> -
> -	return ret;
> -
> - failring:
> -	led_classdev_unregister(&fsg_sync_led);
> - failsync:
> -	led_classdev_unregister(&fsg_usb_led);
> - failusb:
> -	led_classdev_unregister(&fsg_sata_led);
> - failsata:
> -	led_classdev_unregister(&fsg_wan_led);
> - failwan:
> -	led_classdev_unregister(&fsg_wlan_led);
> - failwlan:
> -
> -	return ret;
> -}
> -
> -static int fsg_led_remove(struct platform_device *pdev)
> -{
> -	led_classdev_unregister(&fsg_wlan_led);
> -	led_classdev_unregister(&fsg_wan_led);
> -	led_classdev_unregister(&fsg_sata_led);
> -	led_classdev_unregister(&fsg_usb_led);
> -	led_classdev_unregister(&fsg_sync_led);
> -	led_classdev_unregister(&fsg_ring_led);
> +		return ret;
>
>   	return 0;
>   }
>
> -
>   static struct platform_driver fsg_led_driver = {
>   	.probe		= fsg_led_probe,
> -	.remove		= fsg_led_remove,
>   	.driver		= {
>   		.name		= "fsg-led",
>   	},
>

We've had a similar patch for this driver already. Please refer to
linux-next or LED tree:

git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds.git

-- 
Best Regards,
Jacek Anaszewski
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