linux-kernel - Re: [PATCH v2] cpufreq/amd-pstate: Fix per-policy boost flag incorrect when fail

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Message-ID: <ca98621c-bf1a-4cf0-abbc-81cf4dabc63f@amd.com>
Date: Fri, 10 Jan 2025 09:51:54 -0600
From: Mario Limonciello <mario.limonciello@....com>
To: Lifeng Zheng <zhenglifeng1@...wei.com>, rafael@...nel.org,
 viresh.kumar@...aro.org, perry.yuan@....com
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
 linuxarm@...wei.com, jonathan.cameron@...wei.com, zhanjie9@...ilicon.com,
 lihuisong@...wei.com, fanghao11@...wei.com
Subject: Re: [PATCH v2] cpufreq/amd-pstate: Fix per-policy boost flag
 incorrect when fail

On 1/10/2025 03:19, Lifeng Zheng wrote:
> Commit c8c68c38b56f ("cpufreq: amd-pstate: initialize core precision
> boost state") sets per-policy boost flag to false when boost fail.
> However, this boost flag will be set to reverse value in
> store_local_boost() and cpufreq_boost_trigger_state() in cpufreq.c. This
> will cause the per-policy boost flag set to true when fail to set boost.
> Remove the extra assignment in amd_pstate_set_boost() and keep all
> operations on per-policy boost flag outside of set_boost() to fix this
> problem.
> 
> Fixes: c8c68c38b56f ("cpufreq: amd-pstate: initialize core precision boost state")
> Signed-off-by: Lifeng Zheng <zhenglifeng1@...wei.com>

Thanks, looks good to me.  I've queued this up on my bleeding-edge 
branch for testing.  I'll include this in one of the future 6.14-rc pull 
requests with other fixes.

Reviewed-by: Mario Limonciello <mario.limonciello@....com>

> ---
>   drivers/cpufreq/amd-pstate.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index d7b1de97727a..a2573393ce30 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -747,7 +747,6 @@ static int amd_pstate_set_boost(struct cpufreq_policy *policy, int state)
>   	guard(mutex)(&amd_pstate_driver_lock);
>   
>   	ret = amd_pstate_cpu_boost_update(policy, state);
> -	policy->boost_enabled = !ret ? state : false;
>   	refresh_frequency_limits(policy);
>   
>   	return ret;