ACPI: use after free in acpi_battery_add()

"battery" was dereferenced on the error path here.

Signed-off-by Dan Carpenter <[email protected]>

drivers/acpi/battery.c +1 -0

index fcc13ac..cfc7a5b 100644
@@ -988,6 +988,7 @@ static int acpi_battery_add(struct acpi_device *device)
 		acpi_battery_remove_fs(device);
 #endif
 		kfree(battery);
+		return result;
 	}
 
 	battery->pm_nb.notifier_call = battery_notify;