linux-kernel - Re: [PATCHv2 8/8] extcon: arizona: Use devm_extcon_dev

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Date:	Fri, 18 Apr 2014 09:09:53 +0900
From:	Sangjung <sangjung.woo@...sung.com>
To:	Chanwoo Choi <cwchoi00@...il.com>
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Seung-Woo Kim <sw0312.kim@...sung.com>
Subject: Re: [PATCHv2 8/8] extcon: arizona: Use devm_extcon_dev_register()

Hi Chanwoo.

On 04/18/2014 12:29 AM, Chanwoo Choi wrote:
> Hi Sangjung,
>
> Seung-Woo reviewed this patch previously but, He didn't send
> reviewed-by message as reply.
> After received reviewed-by message, I think that we should add it on
> patch description.

Frankly speaking, I didn't know the basic acknowledge procedure of Linux 
Kernel development.
Thank you for your advice.

I will add the _reviewed-by_ message after I get it from Seung-woo.

BRs,
Sangjung

> Thanks,
> Chanwoo Choi
>
> On Thu, Apr 17, 2014 at 7:10 PM, Sangjung Woo <sangjung.woo@...sung.com> 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>
>> Reviewed-by: Seung-Woo Kim <sw0312.kim@...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);
>> -               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;
>>   }
>> --
>> 1.7.9.5
>>
>> --
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