Merge: power: supply: core: Use blocking_notifier_call_chain to avoid RCU complaint

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/5286

JIRA: https://issues.redhat.com/browse/RHEL-36251

Resolves: 36251

Fix an RCU issue that happens on some HP laptops.

Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>

Approved-by: Wander Lairson Costa <wander@redhat.com>
Approved-by: Phil Auld <pauld@redhat.com>
Approved-by: David Arcari <darcari@redhat.com>
Approved-by: Lenny Szubowicz <lszubowi@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

drivers/power/supply/power_supply_core.c

@@ -29,7 +29,7 @@
 struct class *power_supply_class;
 EXPORT_SYMBOL_GPL(power_supply_class);
 
-ATOMIC_NOTIFIER_HEAD(power_supply_notifier);
+BLOCKING_NOTIFIER_HEAD(power_supply_notifier);
 EXPORT_SYMBOL_GPL(power_supply_notifier);
 
 static struct device_type power_supply_dev_type;
@@ -97,7 +97,7 @@ static void power_supply_changed_work(struct work_struct *work)
 		class_for_each_device(power_supply_class, NULL, psy,
 				      __power_supply_changed_work);
 		power_supply_update_leds(psy);
-		atomic_notifier_call_chain(&power_supply_notifier,
+		blocking_notifier_call_chain(&power_supply_notifier,
 				PSY_EVENT_PROP_CHANGED, psy);
 		kobject_uevent(&psy->dev.kobj, KOBJ_CHANGE);
 		spin_lock_irqsave(&psy->changed_lock, flags);
@@ -1262,13 +1262,13 @@ static void power_supply_dev_release(struct device *dev)
 
 int power_supply_reg_notifier(struct notifier_block *nb)
 {
-	return atomic_notifier_chain_register(&power_supply_notifier, nb);
+	return blocking_notifier_chain_register(&power_supply_notifier, nb);
 }
 EXPORT_SYMBOL_GPL(power_supply_reg_notifier);
 
 void power_supply_unreg_notifier(struct notifier_block *nb)
 {
-	atomic_notifier_chain_unregister(&power_supply_notifier, nb);
+	blocking_notifier_chain_unregister(&power_supply_notifier, nb);
 }
 EXPORT_SYMBOL_GPL(power_supply_unreg_notifier);
 

include/linux/power_supply.h

@@ -731,7 +731,7 @@ struct power_supply_battery_info {
 	int bti_resistance_tolerance;
 };
 
-extern struct atomic_notifier_head power_supply_notifier;
+extern struct blocking_notifier_head power_supply_notifier;
 extern int power_supply_reg_notifier(struct notifier_block *nb);
 extern void power_supply_unreg_notifier(struct notifier_block *nb);
 #if IS_ENABLED(CONFIG_POWER_SUPPLY)