linux-kernel - Re: [PATCH 1/1] regulator: mc13xxx: check if DT is enabled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <530C6BD2.5090209@epfl.ch>
Date:	Tue, 25 Feb 2014 11:09:22 +0100
From:	Philippe Rétornaz <philippe.retornaz@...l.ch>
To:	Sachin Kamat <sachin.kamat@...aro.org>
CC:	Mark Brown <broonie@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Liam Girdwood <lgirdwood@...il.com>
Subject: Re: [PATCH 1/1] regulator: mc13xxx: check if DT is enabled

Le 25/02/2014 10:12, Sachin Kamat a écrit :
> On 25 February 2014 14:17, Philippe Rétornaz <philippe.retornaz@...l.ch> wrote:
>> This fix a regression on non-DT board booted with a DT enabled kernel
>>
>> Signed-off-by: Philippe Rétornaz <philippe.retornaz@...l.ch>
>> ---
>>   drivers/regulator/mc13xxx-regulator-core.c |    6 ++++++
>>   1 file changed, 6 insertions(+)
>>
>> diff --git a/drivers/regulator/mc13xxx-regulator-core.c b/drivers/regulator/mc13xxx-regulator-core.c
>> index 4498a3f..a10c999 100644
>> --- a/drivers/regulator/mc13xxx-regulator-core.c
>> +++ b/drivers/regulator/mc13xxx-regulator-core.c
>> @@ -167,6 +167,9 @@ int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
>>          struct device_node *parent;
>>          int num;
>>
>> +       if(!pdev->dev.parent->of_node)
>> +               return -ENODEV;
>> +
>>          of_node_get(pdev->dev.parent->of_node);
>>          parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
>>          if (!parent)
>> @@ -187,6 +190,9 @@ struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
>>          struct device_node *parent, *child;
>>          int i, parsed = 0;
>>
>> +       if(!pdev->dev.parent->of_node)
>> +               return NULL;
>> +
>>          of_node_get(pdev->dev.parent->of_node);
>>          parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
>>          if (!parent)
>> --
>> 1.7.9.5
>>
>
> Thanks for the patch. I was about to send a similar patch which also
> does a little more cleanup.
> If you could test it in DT and non-DT modes that would be great. I
> attach the diff below. You can
> even fold it into your patch if you wish.

It does fix the regression on the non-DT board.
I don't have any DT-enabled board with mc13xxx PMIC so I cannot test the
DT case. I will let you test the DT case & submit the final patch.

Regards,

Philippe


>
> ------------------
> diff --git a/drivers/regulator/mc13xxx-regulator-core.c
> b/drivers/regulator/mc13xxx-regulator-core.c
> index 4498a3f0733d..bf75fcabfa3c 100644
> --- a/drivers/regulator/mc13xxx-regulator-core.c
> +++ b/drivers/regulator/mc13xxx-regulator-core.c
> @@ -167,8 +167,10 @@ int mc13xxx_get_num_regulators_dt(struct
> platform_device *pdev)
>          struct device_node *parent;
>          int num;
>
> -       of_node_get(pdev->dev.parent->of_node);
> -       parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
> +       if (!pdev->dev.of_node)
> +               return -ENODEV;
> +
> +       parent = of_get_child_by_name(pdev->dev.of_node, "regulators");
>          if (!parent)
>                  return -ENODEV;
>
> @@ -187,8 +189,10 @@ struct mc13xxx_regulator_init_data
> *mc13xxx_parse_regulators_dt(
>          struct device_node *parent, *child;
>          int i, parsed = 0;
>
> -       of_node_get(pdev->dev.parent->of_node);
> -       parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
> +       if (!pdev->dev.of_node)
> +               return NULL;
> +
> +       parent = of_get_child_by_name(pdev->dev.of_node, "regulators");
>          if (!parent)
>                  return NULL;
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/