linux-kernel - Re: [PATCH v4 4/4] opp: Make _set_opp

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Date:   Fri, 22 Jan 2021 17:44:54 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Kevin Hilman <khilman@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        Yangtao Li <tiny.windzz@...il.com>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v4 4/4] opp: Make _set_opp_custom() work without
 regulators

22.01.2021 10:26, Viresh Kumar пишет:
> On 21-01-21, 01:26, Dmitry Osipenko wrote:
>> Check whether OPP table has regulators in _set_opp_custom() and set up
>> dev_pm_set_opp_data accordingly. Now _set_opp_custom() works properly,
>> i.e. it doesn't crash if OPP table doesn't have assigned regulators.
>>
>> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>> ---
>>  drivers/opp/core.c | 26 +++++++++++++++++---------
>>  1 file changed, 17 insertions(+), 9 deletions(-)
> 
> I have applied this instead:
> 
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 32d653774adc..805fc2602808 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -828,24 +828,31 @@ static int _set_opp_custom(const struct opp_table *opp_table,
>                            struct dev_pm_opp_supply *old_supply,
>                            struct dev_pm_opp_supply *new_supply)
>  {
> -       struct dev_pm_set_opp_data *data;
> +       struct dev_pm_set_opp_data *data = opp_table->set_opp_data;
>         int size;
>  
> -       data = opp_table->set_opp_data;
> +       /*
> +        * We support this only if dev_pm_opp_set_regulators() was called
> +        * earlier.
> +        */
> +       if (opp_table->sod_supplies) {
> +               size = sizeof(*old_supply) * opp_table->regulator_count;
> +               if (!old_supply)
> +                       memset(data->old_opp.supplies, 0, size);
> +               else
> +                       memcpy(data->old_opp.supplies, old_supply, size);
> +
> +               memcpy(data->new_opp.supplies, new_supply, size);
> +               data->regulator_count = opp_table->regulator_count;
> +       } else {
> +               data->regulator_count = 0;
> +       }
> +
>         data->regulators = opp_table->regulators;
> -       data->regulator_count = opp_table->regulator_count;
>         data->clk = opp_table->clk;
>         data->dev = dev;
> -
>         data->old_opp.rate = old_freq;
> -       size = sizeof(*old_supply) * opp_table->regulator_count;
> -       if (!old_supply)
> -               memset(data->old_opp.supplies, 0, size);
> -       else
> -               memcpy(data->old_opp.supplies, old_supply, size);
> -
>         data->new_opp.rate = freq;
> -       memcpy(data->new_opp.supplies, new_supply, size);
>  
>         return opp_table->set_opp(data);
>  }
> 
> 

I replied to the wrong email, but this also looks good :) Thanks!