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Subject: Re: [PATCH 1/2] powercap/drivers/dtpm: Fix root node initialization
To:     "Rafael J. Wysocki" <rafael@kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux PM <linux-pm@vger.kernel.org>
References: <20210224183022.11846-1-daniel.lezcano@linaro.org>
 <CAJZ5v0igJztj3fRoGh9AjAPfe01wsBT27X8b19HAyr0t2kRgtg@mail.gmail.com>
From:   Daniel Lezcano <daniel.lezcano@linaro.org>
Message-ID: <67319766-8a76-7b24-96ea-17e2e5ea09d1@linaro.org>
Date:   Mon, 1 Mar 2021 19:15:02 +0100
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On 01/03/2021 17:45, Rafael J. Wysocki wrote:
> On Wed, Feb 24, 2021 at 7:30 PM Daniel Lezcano
> <daniel.lezcano@linaro.org> wrote:
>>
>> The root node is not set to NULL when the dtpm root node is
>> removed. Consequently, it is not possible to create a new root as it
>> is already set.
>>
>> Set the root node to NULL when the last node is removed.
>>
>> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
>> ---
>>  drivers/powercap/dtpm.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/powercap/dtpm.c b/drivers/powercap/dtpm.c
>> index 5a51cd34a7e8..c2185ec5f887 100644
>> --- a/drivers/powercap/dtpm.c
>> +++ b/drivers/powercap/dtpm.c
>> @@ -207,6 +207,9 @@ int dtpm_release_zone(struct powercap_zone *pcz)
>>         if (dtpm->ops)
>>                 dtpm->ops->release(dtpm);
>>
>> +       if (root == dtpm)
>> +               root = NULL;
>> +
>>         kfree(dtpm);
>>
>>         return 0;
>> --
> 
> Applied along with the [2/2[ as 5.12-rc material, thanks!

Thanks


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