linux-kernel - Re: [PATCH] [v2] thermal: core: add upper and lower limits to power_actor_set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <9ecedd8a-fbc3-895c-d79c-f05af5c90ae5@arm.com>
Date:   Wed, 7 Oct 2020 11:55:14 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     Michael Kao <michael.kao@...iatek.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-pm@...r.kernel.org, srv_heupstream@...iatek.com
Cc:     Eduardo Valentin <edubezval@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>, hsinyi@...omium.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] [v2] thermal: core: add upper and lower limits to
 power_actor_set_power


On 10/7/20 3:43 AM, Michael Kao wrote:
> The upper and lower limits of thermal throttle state in the
> DT do not apply to the Intelligent Power Allocation (IPA) governor.
> Add the clamping for cooling device upper and lower limits in the
> power_actor_set_power() used by IPA.
> 
> Signed-off-by: Michael Kao <michael.kao@...iatek.com>
> ---
>   drivers/thermal/thermal_core.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 72bf159bcecc..a260e4a575f3 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -674,7 +674,7 @@ int power_actor_set_power(struct thermal_cooling_device *cdev,
>   	if (ret)
>   		return ret;
>   
> -	instance->target = state;
> +	instance->target = clamp_val(state, instance->lower, instance->upper);
>   	mutex_lock(&cdev->lock);
>   	cdev->updated = false;
>   	mutex_unlock(&cdev->lock);
> 

Please check the patch with scripts/checkpatch.pl before sending.
It's again base64 encoded, I was able to apply it on my end with
--ignore-whitespace, but still some odd char is there.

If Daniel is OK to fix it when applying to the thermal branch, then:

Reviewed-by: Lukasz Luba <lukasz.luba@....com>
Tested-by: Lukasz Luba <lukasz.luba@....com>

I would send a few patches on top of this one, to fully support the
upper and lower limits in IPA.

Regards,
Lukasz