Re: [PATCH] powercap/drivers/dtpm: Disable dtpm at boot time

From: Daniel Lezcano
Date: Fri Nov 26 2021 - 18:12:57 EST



Hi Doug,

I was unable to reproduce the issue because I don't have an x86 platform.

Is it possible to check if this fix is ok?

-- Daniel

On 27/11/2021 00:08, Daniel Lezcano wrote:
> The DTPM framework misses a mechanism to set it up. That is currently
> under review but will come after the next cycle.
>
> As the distro are enabling all the kernel options, the DTPM framework
> is enabled on platforms where the energy model is not implemented,
> thus making the framework inconsistent and disrupting the CPU
> frequency scaling service.
>
> Remove the initialization at boot time as a hot fix.
>
> Fixes: 7a89d7eacf8e ("powercap/drivers/dtpm: Simplify the dtpm table")
> Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
> ---
> drivers/powercap/dtpm.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/drivers/powercap/dtpm.c b/drivers/powercap/dtpm.c
> index b9fac786246a..fb35c5828bfb 100644
> --- a/drivers/powercap/dtpm.c
> +++ b/drivers/powercap/dtpm.c
> @@ -471,9 +471,6 @@ static int __init init_dtpm(void)
> return PTR_ERR(pct);
> }
>
> - for_each_dtpm_table(dtpm_descr)
> - dtpm_descr->init();
> -
> return 0;
> }
> late_initcall(init_dtpm);
>


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