Re: [PATCH 1/7] pmdomain: arm: Fix -EINVAL from scmi_pd_set_perf_state() on state 0

[Ulf Hansson]

On Wed, Aug 12, 2026 at 9:24 AM Mukesh Savaliya
<mukesh.savaliya@xxxxxxxxxxxxxxxx> wrote:
>
>
>
> On 8/5/2026 1:27 AM, Praveen Talari wrote:
> [...]
>
> > ---
> >   drivers/pmdomain/arm/scmi_perf_domain.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pmdomain/arm/scmi_perf_domain.c b/drivers/pmdomain/arm/scmi_perf_domain.c
> > index 3693423459c9..e390f902a444 100644
> > --- a/drivers/pmdomain/arm/scmi_perf_domain.c
> > +++ b/drivers/pmdomain/arm/scmi_perf_domain.c
> > @@ -33,7 +33,7 @@ scmi_pd_set_perf_state(struct generic_pm_domain *genpd, unsigned int state)
> >               return 0;
> >
> >       if (!state)
> > -             return -EINVAL;
> > +             return 0;
>
> Won't this cause an issue to other drivers ? how are they going to take
> action based on changed return value ?

I think it's rather the opposite. With the current returned value
(-EINVAL) the driver doesn't really know what to do. It tried to drop
its vote, but that failed - so what can it do?

Moreover, from genpd point of view, this fixes a real bug as the
aggregation for the performance state becomes incorrect during runtime
suspend/resume.

>
> Remove Acked-by due to this till i give back.
> >
> >       ret = pd->perf_ops->level_set(pd->ph, pd->domain_id, state, false);
> >       if (ret)
> >
>

Kind regards
Uffe