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();