linux-kernel - Re: [PATCH 10/31] devfreq: exynos: Migrate to dev_pm_opp_set

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Date:   Tue, 31 May 2022 10:42:11 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Chanwoo Choi <cw00.choi@...sung.com>
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/31] devfreq: exynos: Migrate to dev_pm_opp_set_config()

On 31-05-22, 14:05, Chanwoo Choi wrote:
> > diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> > index 780e525eb92a..8fca24565e7d 100644
> > --- a/drivers/devfreq/exynos-bus.c
> > +++ b/drivers/devfreq/exynos-bus.c
> > @@ -161,8 +161,11 @@ static void exynos_bus_exit(struct device *dev)
> > 
> >         dev_pm_opp_of_remove_table(dev);
> >         clk_disable_unprepare(bus->clk);
> > -       dev_pm_opp_clear_config(bus->opp_table);
> > -       bus->opp_table = NULL;
> > +
> > +       if (bus->opp_table) {
> > +               dev_pm_opp_clear_config(bus->opp_table);
> > +               bus->opp_table = NULL;
> > +       }
> >  }
> > 
> >  static void exynos_bus_passive_exit(struct device *dev)
> > @@ -463,8 +466,10 @@ static int exynos_bus_probe(struct platform_device *pdev)
> >         dev_pm_opp_of_remove_table(dev);
> >         clk_disable_unprepare(bus->clk);
> >  err_reg:
> > -       dev_pm_opp_clear_config(bus->opp_table);
> > -       bus->opp_table = NULL;
> > +       if (bus->opp_table) {
> > +               dev_pm_opp_clear_config(bus->opp_table);
> > +               bus->opp_table = NULL;
> > +       }
> > 
> >         return ret;
> >  }
> > 
> 
> This change is enough to remove the null pointer error. Thanks.

Pushed this and WARN_ON() in OPP core. Thanks.

-- 
viresh