linux-kernel - Re: [PATCH] pinctrl: single: fix error return code in pcs_parse_one_pinctrl

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Date:	Tue, 7 May 2013 20:57:49 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	haojian.zhuang@...aro.org
Cc:	linus.walleij@...aro.org, grant.likely@...aro.org,
	rob.herring@...xeda.com, yongjun_wei@...ndmicro.com.cn,
	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH] pinctrl: single: fix error return code in pcs_parse_one_pinctrl_entry()

On 05/07/2013 08:11 PM, Haojian Zhuang wrote:
> On 7 May 2013 20:06, Wei Yongjun <weiyj.lk@...il.com> wrote:
>> From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
>>
>> Fix to return a negative error code from the error handling
>> case instead of 0, as done elsewhere in this function.
>>
>> Introduced by commit 9dddb4df90d136429b6d6ddefceb49a9b93f6cd1
>> (pinctrl: single: support generic pinconf)
>>
>> Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
>> ---
>>  drivers/pinctrl/pinctrl-single.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
>> index 5f2d2bf..b9fa046 100644
>> --- a/drivers/pinctrl/pinctrl-single.c
>> +++ b/drivers/pinctrl/pinctrl-single.c
>> @@ -1166,7 +1166,8 @@ static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs,
>>         (*map)->data.mux.function = np->name;
>>
>>         if (pcs->is_pinconf) {
>> -               if (pcs_parse_pinconf(pcs, np, function, map))
>> +               res = pcs_parse_pinconf(pcs, np, function, map);
>> +               if (res)
>>                         goto free_pingroups;
>>                 *num_maps = 2;
>>         } else {
>>
> It seems that you don't change anything. pcs_parse_pinconf() returns
> either 0 or negative value.
>
> If it returns negative value, it will goto free_pingroups label w/wo
> your change. So I don't understand why your change is necessary.

return res as the error code. before this change, 0 will be return
in this case.


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