[PATCH v3 1/2] power_supply: Register cooling device outside of probe
From: Manaf Meethalavalappu Pallikunhi <hidden>
Date: 2021-12-20 18:46:52
Also in:
lkml
Subsystem:
power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
Registering the cooling device from the probe can result in the execution of get_property() function before it gets initialized. To avoid this, register the cooling device from a workqueue instead of registering in the probe. Signed-off-by: Manaf Meethalavalappu Pallikunhi <redacted> --- drivers/power/supply/power_supply_core.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 10a357a..ea3e75e 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c@@ -132,6 +132,7 @@ void power_supply_changed(struct power_supply *psy) } EXPORT_SYMBOL_GPL(power_supply_changed); +static int psy_register_cooler(struct power_supply *psy); /* * Notify that power supply was registered after parent finished the probing. *
@@ -139,6 +140,8 @@ EXPORT_SYMBOL_GPL(power_supply_changed); * calling power_supply_changed() directly from power_supply_register() * would lead to execution of get_property() function provided by the driver * too early - before the probe ends. + * Also, registering cooling device from the probe will execute the + * get_property() function. So register the cooling device after the probe. * * Avoid that by waiting on parent's mutex. */
@@ -156,6 +159,7 @@ static void power_supply_deferred_register_work(struct work_struct *work) } power_supply_changed(psy); + psy_register_cooler(psy); if (psy->dev.parent) mutex_unlock(&psy->dev.parent->mutex);
@@ -1257,10 +1261,6 @@ __power_supply_register(struct device *parent, if (rc) goto register_thermal_failed; - rc = psy_register_cooler(psy); - if (rc) - goto register_cooler_failed; - rc = power_supply_create_triggers(psy); if (rc) goto create_triggers_failed;
@@ -1290,8 +1290,6 @@ __power_supply_register(struct device *parent, add_hwmon_sysfs_failed: power_supply_remove_triggers(psy); create_triggers_failed: - psy_unregister_cooler(psy); -register_cooler_failed: psy_unregister_thermal(psy); register_thermal_failed: device_del(dev);