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thermal/debugfs: Do not extend mitigation episodes beyond system resume

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Because thermal zone handling by the thermal core is started from
scratch during resume from system-wide suspend, prevent the debug
code from extending mitigation episodes beyond that point by ending
the mitigation episode currently in progress, if any, for each thermal
zone.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2024-05-28 16:53:47 +02:00
parent 8b95bed0ce
commit 9b73b5052a
3 changed files with 39 additions and 0 deletions
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1
drivers/thermal/thermal_core.c
View File

@ -1648,6 +1648,7 @@ static void thermal_zone_device_resume(struct work_struct *work)
tz->suspended = false;
thermal_debug_tz_resume(tz);
thermal_zone_device_init(tz);
__thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);

36
drivers/thermal/thermal_debugfs.c
View File

@ -926,3 +926,39 @@ void thermal_debug_tz_remove(struct thermal_zone_device *tz)
thermal_debugfs_remove_id(thermal_dbg);
kfree(trips_crossed);
}
void thermal_debug_tz_resume(struct thermal_zone_device *tz)
{
struct thermal_debugfs *thermal_dbg = tz->debugfs;
ktime_t now = ktime_get();
struct tz_debugfs *tz_dbg;
struct tz_episode *tze;
int i;
if (!thermal_dbg)
return;
mutex_lock(&thermal_dbg->lock);
tz_dbg = &thermal_dbg->tz_dbg;
if (!tz_dbg->nr_trips)
goto out;
/*
* A mitigation episode was in progress before the preceding system
* suspend transition, so close it because the zone handling is starting
* over from scratch.
*/
tze = list_first_entry(&tz_dbg->tz_episodes, struct tz_episode, node);
for (i = 0; i < tz_dbg->nr_trips; i++)
tz_episode_close_trip(tze, tz_dbg->trips_crossed[i], now);
tze->duration = ktime_sub(now, tze->timestamp);
tz_dbg->nr_trips = 0;
out:
mutex_unlock(&thermal_dbg->lock);
}

2
drivers/thermal/thermal_debugfs.h
View File

@ -7,6 +7,7 @@ void thermal_debug_cdev_remove(struct thermal_cooling_device *cdev);
void thermal_debug_cdev_state_update(const struct thermal_cooling_device *cdev, int state);
void thermal_debug_tz_add(struct thermal_zone_device *tz);
void thermal_debug_tz_remove(struct thermal_zone_device *tz);
void thermal_debug_tz_resume(struct thermal_zone_device *tz);
void thermal_debug_tz_trip_up(struct thermal_zone_device *tz,
const struct thermal_trip *trip);
void thermal_debug_tz_trip_down(struct thermal_zone_device *tz,
@ -20,6 +21,7 @@ static inline void thermal_debug_cdev_state_update(const struct thermal_cooling_
int state) {}
static inline void thermal_debug_tz_add(struct thermal_zone_device *tz) {}
static inline void thermal_debug_tz_remove(struct thermal_zone_device *tz) {}
static inline void thermal_debug_tz_resume(struct thermal_zone_device *tz) {}
static inline void thermal_debug_tz_trip_up(struct thermal_zone_device *tz,
const struct thermal_trip *trip) {};
static inline void thermal_debug_tz_trip_down(struct thermal_zone_device *tz,