Re: [PATCH v3 2/8] thermal: core: Do not handle trip points with invalid temperature

[Rafael J. Wysocki]

On Tue, Aug 1, 2023 at 8:29 PM Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> wrote:
>
> On 25/07/2023 14:06, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >
> > Trip points with temperature set to THERMAL_TEMP_INVALID are as good as
> > disabled, so make handle_thermal_trip() ignore them.
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> > ---
> >
> > v2 -> v3: No changes.
> >
> > v1 -> v2: No changes.
> >
> > ---
> >   drivers/thermal/thermal_core.c |    3 ++-
> >   1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > Index: linux-pm/drivers/thermal/thermal_core.c
> > ===================================================================
> > --- linux-pm.orig/drivers/thermal/thermal_core.c
> > +++ linux-pm/drivers/thermal/thermal_core.c
> > @@ -348,7 +348,8 @@ static void handle_thermal_trip(struct t
> >       struct thermal_trip trip;
> >
> >       /* Ignore disabled trip points */
> > -     if (test_bit(trip_id, &tz->trips_disabled))
> > +     if (test_bit(trip_id, &tz->trips_disabled) ||
> > +         trip.temperature == THERMAL_TEMP_INVALID)
> >               return;
>
> This will set the temperature to THERMAL_TEMP_INVALID at each thermal
> zone update.

What do you mean?

It doesn't set anything.

> It would make more sense to set it when setting the disabled bit at init
> time, no?
>
> But is that something we really want to do ? The trip point will be
> reordered due to the temperature change (-273°C)

Again, I'm not sure what you mean.