linux-kernel - Re: [PATCH 0/2] [media] exynos4-is: Trivial fixes for DT port/endpoint parse logic

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Message-ID: <56DD9086.7070903@osg.samsung.com>
Date:	Mon, 7 Mar 2016 11:30:30 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	linux-kernel@...r.kernel.org, Kukjin Kim <kgene@...nel.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	linux-samsung-soc@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [PATCH 0/2] [media] exynos4-is: Trivial fixes for DT
 port/endpoint parse logic

Hello Sylwester,

On 03/07/2016 06:24 AM, Sylwester Nawrocki wrote:
> Hi Javier, Krzysztof,
> 
> On 03/05/2016 05:35 AM, Krzysztof Kozlowski wrote:
>> 2016-03-05 5:20 GMT+09:00 Javier Martinez Canillas <javier@....samsung.com>:
>>>> Hello,
>>>>
>>>> This series have two trivial fixes for issues that I noticed while
>>>> reading as a reference the driver's functions that parse the graph
>>>> port and endpoints nodes.
>>>>
>>>> It was only compile tested because I don't have access to a Exynos4
>>>> hardware to test the DT parsing, but the patches are very simple.
>>
>> Not directly related, but similar: my previous two patches for missing
>> of_node_put [0] are unfortunately still waiting. Although I have
>> Exynos4 boards, but I don't have infrastructure/scripts to test it.
>>
>> Best regards,
>> Krzysztof
>>

I've reviewed Krzysztof and looks good to me.

>> [0] https://patchwork.linuxtv.org/patch/32707/
> 
> Thanks for the patches, I've delegated them to myself and I'm going to
> review/apply them this week.
>

Thanks, I just noticed another similar issue in the driver now and is
that fimc_is_parse_sensor_config() uses the same struct device_node *
for looking up the I2C sensor, port and endpoint and thus not doing a
of_node_put() for all the nodes on the error path.

I think the right fix is to have a separate struct device_node * for
each so their reference counter cand be incremented and decremented.

> --
> Regards,
> Sylwester
> 

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America