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thermal: core: Mark thermal zones as exiting before unregistration

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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@intel.com>
Link: https://patch.msgid.link/4394176.ejJDZkT8p0@rjwysocki.net
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
This commit is contained in:
Rafael J. Wysocki 2024-10-04 21:26:12 +02:00
parent d07700b474
commit 1dae3e70b4
2 changed files with 4 additions and 0 deletions
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3
drivers/thermal/thermal_core.c
View File

@ -1621,7 +1621,10 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
}
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 */

1
drivers/thermal/thermal_core.h
View File

@ -65,6 +65,7 @@ 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