linux-kernel - Re: [PATCHv3 9/9] extcon: palmas: Use devm_extcon_dev_allocate for extcon

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Message-ID: <CAGTfZH1XgRkGWL+ySZ8uTKbhD9djZx3C4Tar+aKkUEmLAV7KJw@mail.gmail.com>
Date:	Fri, 25 Apr 2014 00:13:12 +0900
From:	Chanwoo Choi <cwchoi00@...il.com>
To:	Felipe Balbi <balbi@...com>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>,
	gg@...mlogic.co.uk, Kishon Vijay Abraham I <kishon@...com>,
	ckeepax@...nsource.wolfsonmicro.com,
	Mark Brown <broonie@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCHv3 9/9] extcon: palmas: Use devm_extcon_dev_allocate for extcon_dev

On Thu, Apr 24, 2014 at 11:47 PM, Felipe Balbi <balbi@...com> wrote:
> On Thu, Apr 24, 2014 at 09:34:57PM +0900, Chanwoo Choi wrote:
>> This patch use devm_extcon_dev_allocate() to simplify the memory control
>> of extcon device.
>>
>> Cc: Graeme Gregory <gg@...mlogic.co.uk>
>> Cc: Kishon Vijay Abraham I <kishon@...com>
>> Cc: Felipe Balbi <balbi@...com>
>> Cc: Samuel Ortiz <sameo@...ux.intel.com>
>> Cc: Lee Jones <lee.jones@...aro.org>
>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>> Acked-by: Lee Jones <lee.jones@...aro.org>
>
> Tested-by: Felipe Balbi <balbi@...com>

Thanks for your test.

>
> *BUT* you need to fix NULL vs ERR_PTR return in your code. The way this
> is, we can easily dereference an ERR_PTR because the code doesn't test
> for it. I suggest always returning valid pointer or ERR_PTR and avoid
> returning NULL at all.

OK, as my reply on other mail, I'll fix return type by using ERR_PTR
instead of NULL.

Thanks,
Chanwoo Choi
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