Re: [STABLE 5.15][PATCH] thermal: devfreq_cooling: Fix perf state when calculate dfc res_util

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On 4/5/24 10:33, Greg KH wrote:
On Thu, Apr 04, 2024 at 11:13:29AM +0100, Lukasz Luba wrote:
From: Ye Zhang <ye.zhang@xxxxxxxxxxxxxx>

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: Lukasz Luba <lukasz.luba@xxxxxxx>
---

Hi Greg,

I have solved small backporting conflict to that v5.15.
The patch is based on tag v5.15.99 and it's for this
failing backport:
https://lore.kernel.org/stable/2024033050-imitation-unmixed-ef53@gregkh/

Thanks, next time all that I need is the git id of this in Linus's tree,
no need to point to a previous FAILED email.

OK, I will remember.

Regards,
Lukasz




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