--- acpi_pci_link.c.orig	Tue Jan  3 19:27:08 2006
+++ acpi_pci_link.c	Tue Jan  3 19:27:42 2006
@@ -447,8 +447,10 @@
 	}
 	sc->pl_num_links = creq.count;
 	device_printf(dev, "num_links = %d\n", sc->pl_num_links);
-	if (creq.count == 0)
+	if (creq.count == 0) {
+		ACPI_SERIAL_END(pci_link);
 		return (0);
+	}
 	sc->pl_links = malloc(sizeof(struct link) * sc->pl_num_links,
 	    M_PCI_LINK, M_WAITOK | M_ZERO);