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thermal: core: Add and use a reverse thermal zone guard

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Add a guard for unlocking a locked thermal zone temporarily and use it
in thermal_zone_pm_prepare().

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3344086.aeNJFYEL58@rjwysocki.net
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
This commit is contained in:
Rafael J. Wysocki
2024-10-11 00:07:11 +02:00
parent cba00d16a2
commit 57f076664c
2 changed files with 6 additions and 5 deletions
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8
drivers/thermal/thermal_core.c
View File

@@ -1711,11 +1711,9 @@ static void thermal_zone_pm_prepare(struct thermal_zone_device *tz)
* acquired the lock yet, so release it to let the function run
* and wait util it has done the work.
*/
mutex_unlock(&tz->lock);
wait_for_completion(&tz->resume);
mutex_lock(&tz->lock);
scoped_guard(thermal_zone_reverse, tz) {
wait_for_completion(&tz->resume);
}
}
tz->state |= TZ_STATE_FLAG_SUSPENDED;

3
drivers/thermal/thermal_core.h
View File

@@ -150,6 +150,9 @@ struct thermal_zone_device {
DEFINE_GUARD(thermal_zone, struct thermal_zone_device *, mutex_lock(&_T->lock),
mutex_unlock(&_T->lock))
DEFINE_GUARD(thermal_zone_reverse, struct thermal_zone_device *,
mutex_unlock(&_T->lock), mutex_lock(&_T->lock))
/* Initial thermal zone temperature. */
#define THERMAL_TEMP_INIT INT_MIN