diff --git a/[refs] b/[refs]
index 88ca02bc7b73..6c13ba5d18fe 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 89911501f3aae44a43984793341a3bf1f4c583c2
+refs/heads/master: 7214610475b2847a81478d96e4d3ba0bbe49598c
diff --git a/trunk/drivers/xen/events.c b/trunk/drivers/xen/events.c
index 06f2e61de691..accb37ad0944 100644
--- a/trunk/drivers/xen/events.c
+++ b/trunk/drivers/xen/events.c
@@ -434,6 +434,10 @@ static int xen_allocate_irq_gsi(unsigned gsi)
 
 static void xen_free_irq(unsigned irq)
 {
+	/* Legacy IRQ descriptors are managed by the arch. */
+	if (irq < NR_IRQS_LEGACY)
+		return;
+
 	irq_free_desc(irq);
 }