linux-kernel - Re: [PATCH] leds: ktd2692: Add missing of_node

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Date:	Mon, 16 Nov 2015 15:30:18 +0100
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	Rob Herring <robh+dt@...nel.org>
Cc:	Ingi Kim <ingi2.kim@...sung.com>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] leds: ktd2692: Add missing of_node_put

On 11/16/2015 03:09 PM, Rob Herring wrote:
> On Mon, Nov 16, 2015 at 4:00 AM, Jacek Anaszewski
> <j.anaszewski@...sung.com> wrote:
>> Hi Ingi, Rob,
>>
>> With this patch we will be leaking of_node when parsing succeeds.
>> I think that "return 0" should be removed. I can remove it and apply,
>> provided that Rob's ack is still in force with this. Rob?
>
> Okay.

Removed discussed line and applied, thanks.

>> On 11/10/2015 04:00 AM, Ingi Kim wrote:
>>>
>>> The refcount of device_node increases after of_node_get() is called.
>>> So, a break out of the loop requires of_node_put().
>>>
>>> This patch adds missing of_node_put() when loop breaks.
>>>
>>> Signed-off-by: Ingi Kim <ingi2.kim@...sung.com>
>>> ---
>>>    drivers/leds/leds-ktd2692.c | 11 ++++++++---
>>>    1 file changed, 8 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c
>>> index feca07b..dbf37ce 100644
>>> --- a/drivers/leds/leds-ktd2692.c
>>> +++ b/drivers/leds/leds-ktd2692.c
>>> @@ -332,21 +332,26 @@ static int ktd2692_parse_dt(struct ktd2692_context
>>> *led, struct device *dev,
>>>                                     &cfg->movie_max_microamp);
>>>          if (ret) {
>>>                  dev_err(dev, "failed to parse led-max-microamp\n");
>>> -               return ret;
>>> +               goto err_parse_dt;
>>>          }
>>>
>>>          ret = of_property_read_u32(child_node, "flash-max-microamp",
>>>                                     &cfg->flash_max_microamp);
>>>          if (ret) {
>>>                  dev_err(dev, "failed to parse flash-max-microamp\n");
>>> -               return ret;
>>> +               goto err_parse_dt;
>>>          }
>>>
>>>          ret = of_property_read_u32(child_node, "flash-max-timeout-us",
>>>                                     &cfg->flash_max_timeout);
>>> -       if (ret)
>>> +       if (ret) {
>>>                  dev_err(dev, "failed to parse flash-max-timeout-us\n");
>>> +               goto err_parse_dt;
>>> +       }
>>> +
>>> +       return 0;
>>>
>>> +err_parse_dt:
>>>          of_node_put(child_node);
>>>          return ret;
>>>    }
>>>
>>
> --
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-- 
Best Regards,
Jacek Anaszewski
--
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