Hi Rafael,
On Thu, 2023-01-26 at 14:13 +0100, Rafael J. Wysocki wrote:
> On Thursday, January 26, 2023 1:02:59 AM CET srinivas pandruvada
> wrote:
> > Hi Rafael,
> >
> >
>
[...]
> I've added the appended patch to the thermal-intel-test branch. Can
> you please
> check if it makes that difference in behavior go away?
I synced the tree again and your patch in thermal-intel-test fixes the
issue.
Thanks,
Srinivas
>
> ---
> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Subject: [PATCH] thermal: ACPI: Initialize trips if temperature is
> out of range
>
> In some cases it is still useful to register a trip point if the
> temperature returned by the corresponding ACPI thermal object (for
> example, _HOT) is invalid to start with, because the same ACPI
> thermal object may start to return a valid temperature after a
> system configuration change (for example, from an AC power source
> to battery an vice versa).
>
> For this reason, if the ACPI thermal object evaluated by
> thermal_acpi_trip_init() successfully returns a temperature value
> that
> is out of the range of values taken into account, initialize the trip
> point using THERMAL_TEMP_INVALID as the temperature value instead of
> returning an error to allow the user of the trip point to decide what
> to do with it.
>
> Also update pch_wpt_add_acpi_psv_trip() to reject trip points with
> invalid temperature values.
>
> Fixes: 7a0e39748861 ("thermal: ACPI: Add ACPI trip point routines")
> Reported-by: Srinivas Pandruvada
> <srinivas.pandruvada@xxxxxxxxxxxxxxx>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> ---
> drivers/thermal/intel/intel_pch_thermal.c | 2 +-
> drivers/thermal/thermal_acpi.c | 7 ++++---
> 2 files changed, 5 insertions(+), 4 deletions(-)
>
> Index: linux-pm/drivers/thermal/thermal_acpi.c
> ===================================================================
> --- linux-pm.orig/drivers/thermal/thermal_acpi.c
> +++ linux-pm/drivers/thermal/thermal_acpi.c
> @@ -64,13 +64,14 @@ static int thermal_acpi_trip_init(struct
> return -ENODATA;
> }
>
> - if (temp < TEMP_MIN_DECIK || temp >= TEMP_MAX_DECIK) {
> + if (temp >= TEMP_MIN_DECIK && temp <= TEMP_MAX_DECIK) {
> + trip->temperature =
> deci_kelvin_to_millicelsius(temp);
> + } else {
> acpi_handle_debug(adev->handle, "%s result %llu out
> of range\n",
> obj_name, temp);
> - return -ENODATA;
> + trip->temperature = THERMAL_TEMP_INVALID;
> }
>
> - trip->temperature = deci_kelvin_to_millicelsius(temp);
> trip->hysteresis = 0;
> trip->type = type;
>
> Index: linux-pm/drivers/thermal/intel/intel_pch_thermal.c
> ===================================================================
> --- linux-pm.orig/drivers/thermal/intel/intel_pch_thermal.c
> +++ linux-pm/drivers/thermal/intel/intel_pch_thermal.c
> @@ -107,7 +107,7 @@ static void pch_wpt_add_acpi_psv_trip(st
> return;
>
> ret = thermal_acpi_trip_passive(adev, &ptd-
> >trips[*nr_trips]);
> - if (ret)
> + if (ret || ptd->trips[*nr_trips].temperature <= 0)
> return;
>
> ++(*nr_trips);
>
>
>
