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Thermal control fixes for 6.9-rc2

Browse Source 
- Revert thermal core optimization that introduced a functional issue
    causing a critical trip point to be crossed in some cases (Daniel
    Lezcano).
 
  - Add missing conversion between different state ranges to the
    devfreq cooling device driver (Ye Zhang).
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Merge tag 'thermal-6.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull thermal control fixes from Rafael Wysocki:
 "These revert a problematic optimization commit and address a devfreq
  cooling device issue.

  Specifics:

   - Revert thermal core optimization that introduced a functional issue
     causing a critical trip point to be crossed in some cases (Daniel
     Lezcano)

   - Add missing conversion between different state ranges to the
     devfreq cooling device driver (Ye Zhang)"

* tag 'thermal-6.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thermal: devfreq_cooling: Fix perf state when calculate dfc res_util
  Revert "thermal: core: Don't update trip points inside the hysteresis range"
This commit is contained in:
Linus Torvalds 2024-03-29 11:50:38 -07:00
commit 3a3c0de677
2 changed files with 3 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/thermal/devfreq_cooling.c
View File

@ -214,7 +214,7 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd
res = dfc->power_ops->get_real_power(df, power, freq, voltage);
if (!res) {
state = dfc->capped_state;
state = dfc->max_state - dfc->capped_state;
/* Convert EM power into milli-Watts first */
rcu_read_lock();

19
drivers/thermal/thermal_trip.c
View File

@ -65,7 +65,6 @@ void __thermal_zone_set_trips(struct thermal_zone_device *tz)
{
const struct thermal_trip *trip;
int low = -INT_MAX, high = INT_MAX;
bool same_trip = false;
int ret;
lockdep_assert_held(&tz->lock);
@ -74,36 +73,22 @@ void __thermal_zone_set_trips(struct thermal_zone_device *tz)
return;
for_each_trip(tz, trip) {
bool low_set = false;
int trip_low;
trip_low = trip->temperature - trip->hysteresis;
if (trip_low < tz->temperature && trip_low > low) {
if (trip_low < tz->temperature && trip_low > low)
low = trip_low;
low_set = true;
same_trip = false;
}
if (trip->temperature > tz->temperature &&
trip->temperature < high) {
trip->temperature < high)
high = trip->temperature;
same_trip = low_set;
}
}
/* No need to change trip points */
if (tz->prev_low_trip == low && tz->prev_high_trip == high)
return;
/*
* If "high" and "low" are the same, skip the change unless this is the
* first time.
*/
if (same_trip && (tz->prev_low_trip != -INT_MAX ||
tz->prev_high_trip != INT_MAX))
return;
tz->prev_low_trip = low;
tz->prev_high_trip = high;