This is a note to let you know that I've just added the patch titled
thermal: devfreq_cooling: Fix perf state when calculate dfc res_util
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
thermal-devfreq_cooling-fix-perf-state-when-calculate-dfc-res_util.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a26de34b3c77ae3a969654d94be49e433c947e3b Mon Sep 17 00:00:00 2001
From: Ye Zhang <ye.zhang@xxxxxxxxxxxxxx>
Date: Thu, 21 Mar 2024 18:21:00 +0800
Subject: thermal: devfreq_cooling: Fix perf state when calculate dfc res_util
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From: Ye Zhang <ye.zhang@xxxxxxxxxxxxxx>
commit a26de34b3c77ae3a969654d94be49e433c947e3b upstream.
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@xxxxxxxxxxxxxxx> # 5.11+
Signed-off-by: Ye Zhang <ye.zhang@xxxxxxxxxxxxxx>
Reviewed-by: Dhruva Gole <d-gole@xxxxxx>
Reviewed-by: Lukasz Luba <lukasz.luba@xxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/thermal/devfreq_cooling.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c
@@ -201,7 +201,7 @@ static int devfreq_cooling_get_requested
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 */
dfc->res_util = dfc->em_pd->table[state].power;
Patches currently in stable-queue which might be from ye.zhang@xxxxxxxxxxxxxx are
queue-6.6/thermal-devfreq_cooling-fix-perf-state-when-calculate-dfc-res_util.patch
