Re: [PATCH v3] cpuidle: big.LITTLE: add of_node_put()

From: Frank Lee
Date: Mon Dec 10 2018 - 11:28:03 EST


On Mon, Dec 10, 2018 at 7:59 PM Daniel Lezcano
<daniel.lezcano@xxxxxxxxxx> wrote:
>
>
> Hi Yangtao,
>
>
> On 20/11/2018 17:14, Yangtao Li wrote:
> > of_find_node_by_path() acquires a reference to the node
> > returned by it and that reference needs to be dropped by its caller.
> > bl_idle_init() doesn't do that, so fix it.
> >
> > Signed-off-by: Yangtao Li <tiny.windzz@xxxxxxxxx>
> > ---
> > Changes in v3:
> > -update changelog
> > ---
> > drivers/cpuidle/cpuidle-big_little.c | 6 +++++-
> > 1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/cpuidle/cpuidle-big_little.c b/drivers/cpuidle/cpuidle-big_little.c
> > index db2ede565f1a..650f063ef809 100644
> > --- a/drivers/cpuidle/cpuidle-big_little.c
> > +++ b/drivers/cpuidle/cpuidle-big_little.c
> > @@ -174,8 +174,12 @@ static int __init bl_idle_init(void)
> > /*
> > * Initialize the driver just for a compliant set of machines
> > */
> > - if (!of_match_node(compatible_machine_match, root))
> > + if (!of_match_node(compatible_machine_match, root)){
> > + of_node_put(root);
> > return -ENODEV;
> > + }
> > +
> > + of_node_put(root);
>
> Don't duplicate the of_node_put.
>
> I suggest:
>
> const struct of_device_id *match_id;
>
> [ ... ]
>
>
> match_id = of_match_node(compatible_machine_match, root);
>
> of_node_put(root);
>
> if (!match_id)
> return -ENODEV;
>
>
Thank you for your suggestion, the new one has been sent.

Yours,
Yangtao
> > if (!mcpm_is_available())
> > return -EUNATCH;
> >
>
>
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