linux-kernel - Re: [PATCH v2 14/48] opp: Filter out OPPs based on availability of a required-OPP

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Message-ID: <20201222085940.y625zxee4tevbqm5@vireshk-i7>
Date:   Tue, 22 Dec 2020 14:29:40 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
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>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        "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>,
        Michael Turquette <mturquette@...libre.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 14/48] opp: Filter out OPPs based on availability of a
 required-OPP

On 17-12-20, 21:06, Dmitry Osipenko wrote:
> A required OPP may not be available, and thus, all OPPs which are using
> this required OPP should be unavailable too.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/opp/core.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)

Please send a separate patchset for fixes, as these can also go to 5.11 itself.

> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index d9feb7639598..3d02fe33630b 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1588,7 +1588,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
>  	     struct opp_table *opp_table, bool rate_not_available)
>  {
>  	struct list_head *head;
> -	int ret;
> +	int i, ret;
>  
>  	mutex_lock(&opp_table->lock);
>  	head = &opp_table->opp_list;
> @@ -1615,6 +1615,15 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
>  			 __func__, new_opp->rate);
>  	}
>  
> +	for (i = 0; i < opp_table->required_opp_count && new_opp->available; i++) {
> +		if (new_opp->required_opps[i]->available)
> +			continue;
> +
> +		new_opp->available = false;
> +		dev_warn(dev, "%s: OPP not supported by required OPP %pOF (%lu)\n",
> +			 __func__, new_opp->required_opps[i]->np, new_opp->rate);

Why not just break from here ?

> +	}
> +
>  	return 0;
>  }
>  
> -- 
> 2.29.2

-- 
viresh