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thermal: core: Clean up thermal_list_lock locking

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Once thermal_list_lock has been acquired in
__thermal_cooling_device_register(), it is not necessary to drop it
and take it again until all of the thermal zones have been updated,
so change the code accordingly.

No expected functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2023-03-22 20:34:12 +01:00
parent 0c7d069297
commit cd246fa969
1 changed files with 2 additions and 6 deletions
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8
drivers/thermal/thermal_core.c
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@ -826,8 +826,6 @@ static void bind_cdev(struct thermal_cooling_device *cdev)
const struct thermal_zone_params *tzp;
struct thermal_zone_device *pos = NULL;
mutex_lock(&thermal_list_lock);
list_for_each_entry(pos, &thermal_tz_list, node) {
if (!pos->tzp && !pos->ops->bind)
continue;
@ -854,8 +852,6 @@ static void bind_cdev(struct thermal_cooling_device *cdev)
tzp->tbp[i].weight);
}
}
mutex_unlock(&thermal_list_lock);
}
/**
@ -933,17 +929,17 @@ __thermal_cooling_device_register(struct device_node *np,
/* Add 'this' new cdev to the global cdev list */
mutex_lock(&thermal_list_lock);
list_add(&cdev->node, &thermal_cdev_list);
mutex_unlock(&thermal_list_lock);
/* Update binding information for 'this' new cdev */
bind_cdev(cdev);
mutex_lock(&thermal_list_lock);
list_for_each_entry(pos, &thermal_tz_list, node)
if (atomic_cmpxchg(&pos->need_update, 1, 0))
thermal_zone_device_update(pos,
THERMAL_EVENT_UNSPECIFIED);
mutex_unlock(&thermal_list_lock);
return cdev;