Re: [PATCH v6 3/7] powercap/drivers/dtpm: Simplify the dtpm table

From: Rafael J. Wysocki
Date: Fri Nov 26 2021 - 13:25:39 EST


On Fri, Nov 26, 2021 at 6:40 PM Daniel Lezcano
<daniel.lezcano@xxxxxxxxxx> wrote:
>
> On 26/11/2021 18:08, Doug Smythies wrote:
> > Hi Daniel,
> >
> > This patch introduces a regression, at least on my test system.
> > I can no longer change CPU frequency scaling drivers, for example
> > from intel_cpufreq (A.K.A intel_pstate in passive mode) to intel_pstate
> > (A.K.A. active mode). The task just hangs forever.
> >
> > I bisected the kernel and got this commit as the result.
> > As a double check, I reverted this commit:
> > 7a89d7eacf8e84f2afb94db5ae9d9f9faa93f01c
> > on kernel 5.16-rc2 and the issue was resolved.
> >
> > While your email is fairly old, I observe that it was only included as of
> > kernel 5.16-rc1.
>
> Could it be related to and fixed by:
>
> https://lore.kernel.org/all/20211108062345.273855-1-daniel.lezcano@xxxxxxxxxx/
>
> ?

It seems so, but that patch is present in 5.16-rc2.