Re: FAILED: patch "[PATCH] thermal: devfreq_cooling: Fix perf state when calculate dfc" failed to apply to 5.15-stable tree

[Lukasz Luba <lukasz.luba@arm.com>]

Hi Greg,

On 3/30/24 09:46, gregkh@linuxfoundation.org wrote:
> 
> The patch below does not apply to the 5.15-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.

Would you like my help? I can create a backport to v5.15.y and send
to the list.

Regards,
Lukasz

> 
> To reproduce the conflict and resubmit, you may use the following commands:
> 
> git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
> git checkout FETCH_HEAD
> git cherry-pick -x a26de34b3c77ae3a969654d94be49e433c947e3b
> # <resolve conflicts, build, test, etc.>
> git commit -s
> git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024033050-imitation-unmixed-ef53@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
> 
> Possible dependencies:
> 
> 
> 
> thanks,
> 
> greg k-h
> 
> ------------------ original commit in Linus's tree ------------------
> 
>  From a26de34b3c77ae3a969654d94be49e433c947e3b Mon Sep 17 00:00:00 2001
> From: Ye Zhang <ye.zhang@rock-chips.com>
> Date: Thu, 21 Mar 2024 18:21:00 +0800
> Subject: [PATCH] thermal: devfreq_cooling: Fix perf state when calculate dfc
>   res_util
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
> 
> The issue occurs when the devfreq cooling device uses the EM power model
> and the get_real_power() callback is provided by the driver.
> 
> The EM power table is sorted ascending，can't index the table by cooling
> device state，so convert cooling state to performance state by
> dfc->max_state - dfc->capped_state.
> 
> Fixes: 615510fe13bd ("thermal: devfreq_cooling: remove old power model and use EM")
> Cc: 5.11+ <stable@vger.kernel.org> # 5.11+
> Signed-off-by: Ye Zhang <ye.zhang@rock-chips.com>
> Reviewed-by: Dhruva Gole <d-gole@ti.com>
> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
> index 50dec24e967a..8fd7cf1932cd 100644
> --- a/drivers/thermal/devfreq_cooling.c
> +++ b/drivers/thermal/devfreq_cooling.c
> @@ -214,7 +214,7 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd
>   
>   		res = dfc->power_ops->get_real_power(df, power, freq, voltage);
>   		if (!res) {
> -			state = dfc->capped_state;
> +			state = dfc->max_state - dfc->capped_state;
>   
>   			/* Convert EM power into milli-Watts first */
>   			rcu_read_lock();
>