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Re: [PATCH 2/7] arm: mach-shmobile: pm-rmobile: add missing of_node_put after calling of_parse_phandle

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  Re: [PATCH 2/7] arm: mach-shmobile: pm-rmobile: add missing  of_node_put after calling of_parse_phandle Geert Uytterhoeven <geert@linux-m68k.org> - 2016-07-01 14:40 +0200
    RE: [PATCH 2/7] arm: mach-shmobile: pm-rmobile: add missing  of_node_put after calling of_parse_phandle Peter Chen <peter.chen@nxp.com> - 2016-07-04 09:50 +0200

#1435292 — Re: [PATCH 2/7] arm: mach-shmobile: pm-rmobile: add missing of_node_put after calling of_parse_phandle

Hi Peter,

On Fri, Jul 1, 2016 at 11:41 AM, Peter Chen <peter.chen@nxp.com> wrote:
> of_node_put needs to be called when the device node which is got
> from of_parse_phandle has finished using.
>
> Cc: Simon Horman <horms@verge.net.au>
> Cc: Magnus Damm <magnus.damm@gmail.com>
> Signed-off-by: Peter Chen <peter.chen@nxp.com>

NAKed-by: Geert Uytterhoeven <geert+renesas@glider.be>

> --- a/arch/arm/mach-shmobile/pm-rmobile.c
> +++ b/arch/arm/mach-shmobile/pm-rmobile.c
> @@ -209,6 +209,7 @@ static void __init add_special_pd(struct device_node *np, enum pd_types type)
>         special_pds[num_special_pds].pd = pd;

The pd pointer is stored in the line above, and released later in
put_special_pds().

>         special_pds[num_special_pds].type = type;
>         num_special_pds++;
> +       of_node_put(pd);

Hence it must not be released here, as that would cause a double release
when put_special_pds() is executed.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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#1436223

 
>On Fri, Jul 1, 2016 at 11:41 AM, Peter Chen <peter.chen@nxp.com> wrote:
>> of_node_put needs to be called when the device node which is got from
>> of_parse_phandle has finished using.
>>
>> Cc: Simon Horman <horms@verge.net.au>
>> Cc: Magnus Damm <magnus.damm@gmail.com>
>> Signed-off-by: Peter Chen <peter.chen@nxp.com>
>
>NAKed-by: Geert Uytterhoeven <geert+renesas@glider.be>
>
>> --- a/arch/arm/mach-shmobile/pm-rmobile.c
>> +++ b/arch/arm/mach-shmobile/pm-rmobile.c
>> @@ -209,6 +209,7 @@ static void __init add_special_pd(struct device_node *np,
>enum pd_types type)
>>         special_pds[num_special_pds].pd = pd;
>
>The pd pointer is stored in the line above, and released later in put_special_pds().
>
>>         special_pds[num_special_pds].type = type;
>>         num_special_pds++;
>> +       of_node_put(pd);
>
>Hence it must not be released here, as that would cause a double release when
>put_special_pds() is executed.
>

Thanks, Geert, it is my careless.

Please forget this patch.

Peter

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