linux-kernel - Re: Q: pinctrl: freeing out the allocated map in tegra_pinctrl_dt_node_to

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Date:	Fri, 10 Aug 2012 09:17:48 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	"devendra.aaru" <devendra.aaru@...il.com>
CC:	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: Q: pinctrl: freeing out the allocated map in tegra_pinctrl_dt_node_to_map

On 08/09/2012 11:35 PM, devendra.aaru wrote:
> On Fri, Aug 10, 2012 at 11:02 AM, devendra.aaru <devendra.aaru@...il.com> wrote:
>> Hi,
>>
>> In function tegra_pinctrl_dt_node_to_map the num_maps the num_maps
>> counter must be incremented for each child node?

This I commented on below.

>> Actually we are doing free until num_maps if tegra_pinctrl_dt_subnode_to_map,
>>
>> not only that if num_maps == 0, we wont free up the maps, and also i
>> think the for_each_of_node checks whether we have a next child node,
>> so its safe to do num_maps++ as it wont get incremented endlessly,
>>
>> Please correct me if i am wrong.

I don't quite understand this part, sorry.

>> Thanks,

>> @@ -303,6 +303,7 @@ int tegra_pinctrl_dt_node_to_map(struct
>> pinctrl_dev *pctldev,
>>         *num_maps = 0;
>>
>>         for_each_child_of_node(np_config, np) {
>> +               num_maps++;
>>                 ret = tegra_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
>>                                                       &reserved_maps, num_maps);

That's wrong; tegra_pinctrl_dt_subnode_to_map() calls add_map_mux()
and/or add_map_configs() which increments *num_maps.

Besides, num_maps is a pointer to an integer, so if this was right, it
should be (*num_maps)++.

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