linux-kernel - Re: [PATCH] thermal/drivers/mediatek: remove redundant dev

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Message-ID: <CAH3L5QpgFzyhru8AXHHnp5DFqb60tGxQ93Kf_+vdm12N5V72tw@mail.gmail.com>
Date:   Mon, 14 Aug 2023 09:16:23 +0300
From:   Alexandru Ardelean <alex@...uggie.ro>
To:     Chen-Yu Tsai <wenst@...omium.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, rafael@...nel.org,
        daniel.lezcano@...aro.org, amitk@...nel.org, rui.zhang@...el.com,
        matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        aouledameur@...libre.com, daniel@...rotopia.org,
        void0red@...t.edu.cn, aboutphysycs@...il.com
Subject: Re: [PATCH] thermal/drivers/mediatek: remove redundant dev_warn in probe

On Mon, Aug 14, 2023 at 8:20 AM Chen-Yu Tsai <wenst@...omium.org> wrote:
>
> On Mon, Aug 14, 2023 at 3:09 AM Alexandru Ardelean <alex@...uggie.ro> wrote:
> >
> > There's no need to print any extra messages in the driver if
> > devm_thermal_add_hwmon_sysfs() fails.
> > If this function has any failures, they will already be printed.
> >
> > While looking inside 'drivers/thermal/mediatek/auxadc_thermal.c', the
> > failure will be either be one of:
> >   'Failed to allocate device resource data'
> > or
> >   'Failed to add hwmon sysfs attributes'
> >
> > Also, the failure will be reported on the 'dev' object passed to
> > 'devm_thermal_add_hwmon_sysfs()', so it should be clear which device this
> > error belongs to.
> >
> > Signed-off-by: Alexandru Ardelean <alex@...uggie.ro>
> > ---
> >  drivers/thermal/mediatek/auxadc_thermal.c | 6 +-----
> >  1 file changed, 1 insertion(+), 5 deletions(-)
> >
> > diff --git a/drivers/thermal/mediatek/auxadc_thermal.c b/drivers/thermal/mediatek/auxadc_thermal.c
> > index f59d36de20a0..55f7fde470e5 100644
> > --- a/drivers/thermal/mediatek/auxadc_thermal.c
> > +++ b/drivers/thermal/mediatek/auxadc_thermal.c
> > @@ -1290,11 +1290,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> >         if (IS_ERR(tzdev))
> >                 return PTR_ERR(tzdev);
> >
> > -       ret = devm_thermal_add_hwmon_sysfs(&pdev->dev, tzdev);
> > -       if (ret)
> > -               dev_warn(&pdev->dev, "error in thermal_add_hwmon_sysfs");
> > -
> > -       return 0;
> > +       return devm_thermal_add_hwmon_sysfs(&pdev->dev, tzdev);
>
> You changed the logic here. The original logic is to print a warning
> if the hwmon sysfs stuff failed, but continue to probe the driver. In
> other words, hwmon sysfs failing is a non-fatal error.
>
> Your changes make it fatal.

Ah, right.
My bad

>
> ChenYu
>
> >  }
> >
> >  static struct platform_driver mtk_thermal_driver = {
> > --
> > 2.41.0
> >
> >