linux-kernel - Re: [PATCH v3 01/12] opp: Fix adding OPP entries in a wrong order if rate is unavailable

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Date:   Mon, 18 Jan 2021 13:14:16 +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>,
        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 v3 01/12] opp: Fix adding OPP entries in a wrong order if
 rate is unavailable

On 18-01-21, 03:55, Dmitry Osipenko wrote:
> Fix adding OPP entries in a wrong (opposite) order if OPP rate is
> unavailable. The OPP comparison was erroneously skipped, thus OPPs
> were left unsorted.
> 
> Tested-by: Peter Geis <pgwipeout@...il.com>
> Tested-by: Nicolas Chauvet <kwizart@...il.com>
> Tested-by: Matt Merhar <mattmerhar@...tonmail.com>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/opp/core.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index dfc4208d3f87..48618ff3e99e 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1527,12 +1527,10 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
>  	mutex_lock(&opp_table->lock);
>  	head = &opp_table->opp_list;
>  
> -	if (likely(!rate_not_available)) {
> -		ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
> -		if (ret) {
> -			mutex_unlock(&opp_table->lock);
> -			return ret;
> -		}
> +	ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
> +	if (ret) {
> +		mutex_unlock(&opp_table->lock);
> +		return ret;
>  	}
>  
>  	list_add(&new_opp->node, head);

Applied. Thanks.

I am not sending it for 5.11-rc as there shouldn't be any users which
are impacted because of this right now, right ?

-- 
viresh