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thermal/debugfs: Free all thermal zone debug memory on zone removal

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Because thermal_debug_tz_remove() does not free all memory allocated for
thermal zone diagnostics, some of that memory becomes unreachable after
freeing the thermal zone's struct thermal_debugfs object.

Address this by making thermal_debug_tz_remove() free all of the memory
in question.

Fixes: 7ef01f228c ("thermal/debugfs: Add thermal debugfs information for mitigation episodes")
Cc :6.8+ <stable@vger.kernel.org> # 6.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
This commit is contained in:
Rafael J. Wysocki 2024-04-25 19:52:12 +02:00
parent ed30a4a51b
commit 72c1afffa4
1 changed files with 13 additions and 0 deletions
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13
drivers/thermal/thermal_debugfs.c
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@ -826,15 +826,28 @@ void thermal_debug_tz_add(struct thermal_zone_device *tz)
void thermal_debug_tz_remove(struct thermal_zone_device *tz)
{
struct thermal_debugfs *thermal_dbg = tz->debugfs;
struct tz_episode *tze, *tmp;
struct tz_debugfs *tz_dbg;
int *trips_crossed;
if (!thermal_dbg)
return;
tz_dbg = &thermal_dbg->tz_dbg;
mutex_lock(&thermal_dbg->lock);
trips_crossed = tz_dbg->trips_crossed;
list_for_each_entry_safe(tze, tmp, &tz_dbg->tz_episodes, node) {
list_del(&tze->node);
kfree(tze);
}
tz->debugfs = NULL;
mutex_unlock(&thermal_dbg->lock);
thermal_debugfs_remove_id(thermal_dbg);
kfree(trips_crossed);
}