From 72c1afffa4c645fe0e0f1c03e5f34395ed65b5f4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 25 Apr 2024 19:52:12 +0200 Subject: thermal/debugfs: Free all thermal zone debug memory on zone removal 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: 7ef01f228c9f ("thermal/debugfs: Add thermal debugfs information for mitigation episodes") Cc :6.8+ # 6.8+ Signed-off-by: Rafael J. Wysocki Reviewed-by: Lukasz Luba --- drivers/thermal/thermal_debugfs.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers') diff --git a/drivers/thermal/thermal_debugfs.c b/drivers/thermal/thermal_debugfs.c index d78d54ae2605..8d66b3a96be1 100644 --- a/drivers/thermal/thermal_debugfs.c +++ b/drivers/thermal/thermal_debugfs.c @@ -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); } -- cgit v1.2.3