--- a/sys/dev/acpica/acpi_sony/acpi_sony.c
+++ b/sys/dev/acpica/acpi_sony/acpi_sony.c
@@ -180,12 +180,15 @@
 {
 	device_t	dev = arg1;
 	int 	function = oidp->oid_arg2;
-	int		error = 0, val;
+	int		error, val = 0;
 
-	acpi_GetInteger(acpi_get_handle(dev),
+	error = acpi_GetInteger(acpi_get_handle(dev),
 	    acpi_sony_oids[function].getmethod, &val);
+	if (error != 0)
+		return (error);
 	error = sysctl_handle_int(oidp, &val, 0, req);
-	if (error || !req->newptr || !acpi_sony_oids[function].setmethod)
+	if (error != 0 || req->newptr == NULL ||
+	    acpi_sony_oids[function].setmethod == NULL)
 		return (error);
 	acpi_SetInteger(acpi_get_handle(dev),
 	    acpi_sony_oids[function].setmethod, val);