[PATCH v2 07/12] thermal: core: Mark thermal zones as exiting before unregistration
From: Rafael J. Wysocki
Date: Fri Oct 04 2024 - 16:13:11 EST
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
In analogy with a previous change in the thermal zone registration code
path, to ensure that __thermal_zone_device_update() will return early
for thermal zones that are going away, introduce a thermal zone state
flag representing the "exit" state and set it while deleting the thermal
zone from thermal_tz_list.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
This is a new iteration of
https://lore.kernel.org/linux-pm/1997536.PYKUYFuaPT@xxxxxxxxxxxxx/
v1 -> v2: Rebase.
---
drivers/thermal/thermal_core.c | 3 +++
drivers/thermal/thermal_core.h | 1 +
2 files changed, 4 insertions(+)
Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -1613,7 +1613,10 @@ void thermal_zone_device_unregister(stru
}
mutex_lock(&tz->lock);
+
+ tz->state |= TZ_STATE_FLAG_EXIT;
list_del(&tz->node);
+
mutex_unlock(&tz->lock);
/* Unbind all cdevs associated with 'this' thermal zone */
Index: linux-pm/drivers/thermal/thermal_core.h
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.h
+++ linux-pm/drivers/thermal/thermal_core.h
@@ -64,6 +64,7 @@ struct thermal_governor {
#define TZ_STATE_FLAG_SUSPENDED BIT(0)
#define TZ_STATE_FLAG_RESUMING BIT(1)
#define TZ_STATE_FLAG_INIT BIT(2)
+#define TZ_STATE_FLAG_EXIT BIT(3)
#define TZ_STATE_READY 0