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

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Date:	Tue, 7 May 2013 21:30:30 +0800
From:	Haojian Zhuang <haojian.zhuang@...aro.org>
To:	Wei Yongjun <weiyj.lk@...il.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>, grant.likely@...aro.org,
	Rob Herring <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 7 May 2013 20:57, Wei Yongjun <weiyj.lk@...il.com> wrote:
> 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.
>
>
Yes, I didn't return the error code.

Acked-by: Haojian Zhuang <haojian.zhuang@...aro.org>

Regards
Haojian
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