diff --git a/drivers/acpi/power_meter.c b/drivers/acpi/power_meter.c
index e6bfd77986b8b1061d4d5d5b0a1635e885388692..2ef7030a0c28b7d428de422d6cda082a36ec8723 100644
--- a/drivers/acpi/power_meter.c
+++ b/drivers/acpi/power_meter.c
@@ -294,7 +294,11 @@ static int set_acpi_trip(struct acpi_power_meter_resource *resource)
 		return -EINVAL;
 	}
 
-	return data;
+	/* _PTP returns 0 on success, nonzero otherwise */
+	if (data)
+		return -EINVAL;
+
+	return 0;
 }
 
 static ssize_t set_trip(struct device *dev, struct device_attribute *devattr,