linux-kernel - Re: Q: return of pinctrl_register and handing at drivers that use this function

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Date:	Wed, 20 Jun 2012 09:52:06 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	"devendra.aaru" <devendra.aaru@...il.com>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Q: return of pinctrl_register and handing at drivers that use
 this function

On Mon, Jun 18, 2012 at 4:42 PM, devendra.aaru <devendra.aaru@...il.com> wrote:
> On Mon, Jun 18, 2012 at 8:08 PM, Linus Walleij <linus.walleij@...aro.org> wrote:
>> On Mon, Jun 18, 2012 at 2:04 PM, devendra.aaru <devendra.aaru@...il.com> wrote:
>>
>>> So checking the return value of pinctrl_register with IS_ERR is not required.
>>
>> Nope.
>
> You mean to say that the check "IS_ERR(ret_ptr)" is not required? or
> the other way like its also needed.

I mean it shall be tested like this:

if (!pinmctrl_register(&foo)) {
    /* error case */
}

No IS_ERR() business.

Linus
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