diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index dd62c871b2b5069c5eb80bf2931f98cf6c9b3506..0c2132c7f5d40f8de11d272cb808b0b093d2ddc9 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -619,8 +619,7 @@ int power_supply_get_battery_info(struct power_supply *psy,
 	 * Documentation/power/power_supply_class.rst.
 	 */
 
-	err = of_property_read_string(battery_np, "device-chemistry", &value);
-	if (!err) {
+	if (!of_property_read_string(battery_np, "device-chemistry", &value)) {
 		if (!strcmp("nickel-cadmium", value))
 			info->technology = POWER_SUPPLY_TECHNOLOGY_NiCd;
 		else if (!strcmp("nickel-metal-hydride", value))