linux-kernel - Re: [PATCH] cpufreq: check only freq_table in __resolve

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Message-ID: <20220812040545.gcmyjjpqfup3bo5u@vireshk-i7>
Date:   Fri, 12 Aug 2022 09:35:45 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     linux-kernel@...r.kernel.org, rafael@...nel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH] cpufreq: check only freq_table in __resolve_freq()

On 11-08-22, 17:54, Lukasz Luba wrote:
> The there is no need to check if the cpufreq driver implements callback

s/The there/There/

> cpufreq_driver::target_index. The logic in the __resolve_freq uses
> the frequency table available in the policy. It doesn't matter if the
> driver provides 'target_index' or 'target' callback. It just has to
> populate the 'policy->freq_table'.
> 
> Thus, check only frequency table during the frequency resolving call.
> 
> Signed-off-by: Lukasz Luba <lukasz.luba@....com>
> ---
>  drivers/cpufreq/cpufreq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 7820c4e74289..69b3d61852ac 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -532,7 +532,7 @@ static unsigned int __resolve_freq(struct cpufreq_policy *policy,
>  
>  	target_freq = clamp_val(target_freq, policy->min, policy->max);
>  
> -	if (!cpufreq_driver->target_index)
> +	if (!policy->freq_table)
>  		return target_freq;
>  
>  	idx = cpufreq_frequency_table_target(policy, target_freq, relation);

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh