linux-kernel - Re: [PATCH] leds: leds-netxbig.c: Use devm_led_classdev

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Date:	Wed, 21 Oct 2015 10:25:43 +0200
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	Simon Guinot <simon.guinot@...uanux.org>
Cc:	Fida Mohammad <fmthoker@...il.com>, Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>, linux-leds@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Muhammad Falak <falakreyaz@...il.com>,
	Simon Guinot <sguinot@...ie.com>
Subject: Re: [PATCH] leds: leds-netxbig.c: Use devm_led_classdev_register

On 10/21/2015 10:05 AM, Simon Guinot wrote:
> On Wed, Oct 21, 2015 at 09:01:00AM +0200, Jacek Anaszewski wrote:
>> Hi Fida,
>>
>> On 10/20/2015 10:06 PM, Fida Mohammad wrote:
>>> Use resource managed function devm_led_classdev_register to make
>>> error path simpler. Consequently, removed a goto call and
>>> remove function made simpler.
>>>
>>> Signed-off-by: Fida Mohammad <fmthoker@...il.com>
>>> ---
>>>   drivers/leds/leds-netxbig.c | 25 +++++--------------------
>>>   1 file changed, 5 insertions(+), 20 deletions(-)
>>>
>>> diff --git a/drivers/leds/leds-netxbig.c b/drivers/leds/leds-netxbig.c
>>> index 25e4197..639f8bd 100644
>>> --- a/drivers/leds/leds-netxbig.c
>>> +++ b/drivers/leds/leds-netxbig.c
>>> @@ -299,10 +299,6 @@ static struct attribute *netxbig_led_attrs[] = {
>>>   };
>>>   ATTRIBUTE_GROUPS(netxbig_led);
>>>
>>> -static void delete_netxbig_led(struct netxbig_led_data *led_dat)
>>> -{
>>> -	led_classdev_unregister(&led_dat->cdev);
>>> -}
>>>
>>>   static int
>>>   create_netxbig_led(struct platform_device *pdev,
>>> @@ -343,7 +339,7 @@ create_netxbig_led(struct platform_device *pdev,
>>>   	if (led_dat->mode_val[NETXBIG_LED_SATA] != NETXBIG_LED_INVALID_MODE)
>>>   		led_dat->cdev.groups = netxbig_led_groups;
>>>
>>> -	return led_classdev_register(&pdev->dev, &led_dat->cdev);
>>> +	return devm_led_classdev_register(&pdev->dev, &led_dat->cdev);
>>>   }
>>>
>>>   static int netxbig_led_probe(struct platform_device *pdev)
>>> @@ -367,32 +363,21 @@ static int netxbig_led_probe(struct platform_device *pdev)
>>>
>>>   	for (i = 0; i < pdata->num_leds; i++) {
>>>   		ret = create_netxbig_led(pdev, &leds_data[i], &pdata->leds[i]);
>>> -		if (ret < 0)
>>> -			goto err_free_leds;
>>> +		if (ret < 0) {
>>> +			gpio_ext_free(pdata->gpio_ext);
>>> +			return ret;
>>> +		}
>>>   	}
>>>
>>>   	platform_set_drvdata(pdev, leds_data);
>>>
>>>   	return 0;
>>>
>>> -err_free_leds:
>>> -	for (i = i - 1; i >= 0; i--)
>>> -		delete_netxbig_led(&leds_data[i]);
>>> -
>>> -	gpio_ext_free(pdata->gpio_ext);
>>> -	return ret;
>>>   }
>>>
>>>   static int netxbig_led_remove(struct platform_device *pdev)
>>>   {
>>>   	struct netxbig_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
>>> -	struct netxbig_led_data *leds_data;
>>> -	int i;
>>> -
>>> -	leds_data = platform_get_drvdata(pdev);
>>> -
>>> -	for (i = 0; i < pdata->num_leds; i++)
>>> -		delete_netxbig_led(&leds_data[i]);
>>>
>>>   	gpio_ext_free(pdata->gpio_ext);
>>>
>>>
>>
>> Thanks for the patch.
>>
>> Always when submitting patches please cc also the author.
>> I know that this is a simple optimization, but nevertheless
>> an ack from the author, who can test the patch on the hardware,
>> is valuable. Cc Simon.
>
> Hi Fida and Jacek,
>
> An extended version of this patch (with also the devm_gpio_ conversion)
> is already sitting in the LED's for-next branch.
>
> deae3c1895c234e17dafea57b0d4ce4d5da16559
> leds: netxbig: convert to use the devm_ functions

Hi Simon, Fida,

Indeed. Fida - please use LED tree as a reference for your patches.

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

-- 
Best Regards,
Jacek Anaszewski
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