linux-kernel - Re: [PATCH] [v2] power: supply: bq24190_charger: Fix runtime PM imbalance on error

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Message-ID: <20200619170324.2uh2uoqhzsrdwpmd@earth.universe>
Date:   Fri, 19 Jun 2020 19:03:24 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Dinghao Liu <dinghao.liu@....edu.cn>, Kangjie Lu <kjlu@....edu>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [v2] power: supply: bq24190_charger: Fix runtime PM
 imbalance on error

Hi,

On Mon, May 25, 2020 at 01:09:00PM +0200, Rafael J. Wysocki wrote:
> On Mon, May 25, 2020 at 1:05 PM Dinghao Liu <dinghao.liu@....edu.cn> wrote:
> >
> > pm_runtime_get_sync() increments the runtime PM usage counter even
> > it returns an error code. Thus a pairing decrement is needed on
> > the error handling path to keep the counter balanced.
> >
> > Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
> 
> Better now:
> 
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Thanks, queued.

-- Sebastian

> > ---
> >
> > Changelog:
> >
> > v2: - Use pm_runtime_put_noidle() rather than
> >       pm_runtime_put_autosuspend().
> > ---
> >  drivers/power/supply/bq24190_charger.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> > index 453d6332d43a..7b24c41a2137 100644
> > --- a/drivers/power/supply/bq24190_charger.c
> > +++ b/drivers/power/supply/bq24190_charger.c
> > @@ -481,8 +481,10 @@ static ssize_t bq24190_sysfs_store(struct device *dev,
> >                 return ret;
> >
> >         ret = pm_runtime_get_sync(bdi->dev);
> > -       if (ret < 0)
> > +       if (ret < 0) {
> > +               pm_runtime_put_noidle(bdi->dev);
> >                 return ret;
> > +       }
> >
> >         ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v);
> >         if (ret)
> > --
> > 2.17.1
> >

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