power: supply: core: Fix parsing of battery chemistry/technology

The power_supply_get_battery_info() fails if device-chemistry property
is missing in a device-tree because error variable is propagated to the
final return of the function, fix it.

Fixes: 4eef766b7d4d ("power: supply: core: Parse battery chemistry/technology")
Signed-off-by: Dmitry Osipenko <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>

diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index dd62c871b2b5069c5eb80bf2931f98cf6c9b3506..0c2132c7f5d40f8de11d272cb808b0b093d2ddc9 100644 (file)
--- 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))