linux-kernel - Re: [PATCH 01/12] arm-cci: add missing of_node_put after of_device_is

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Date:   Tue, 16 Apr 2019 14:02:01 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Markus Elfring <Markus.Elfring@....de>,
        Julia Lawall <Julia.Lawall@...6.fr>, linux@....linux.org.uk
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 01/12] arm-cci: add missing of_node_put after
 of_device_is_available

On 14/04/2019 15:45, Markus Elfring wrote:
>> @@ -538,8 +538,10 @@  static int cci_probe(void)
>>   	struct resource res;
>>
>>   	np = of_find_matching_node(NULL, arm_cci_matches);
>> -	if (!of_device_is_available(np))
>> +	if (!of_device_is_available(np)) {
>> +		of_node_put(np);
>>   		return -ENODEV;
>> +	}
>>
>>   	ret = of_address_to_resource(np, 0, &res);
>>   	if (!ret) {
> 
> How do you think about to move this function call to an additional jump target
> for the desired exception handling?

TBH it looks like the whole thing could do with a bit of refactoring - 
strictly we should probably be dropping the node reference in all the 
other failure paths too.

Robin.