From 04fec95922740f87f0883a3d18dffcc85a3189cd Mon Sep 17 00:00:00 2001
From: jmcneill <jmcneill@NetBSD.org>
Date: Mon, 6 Oct 2008 02:21:50 +0000
Subject: [PATCH] ehci_free_itd: use LIST_INSERT_HEAD rather than
 LIST_INSERT_AFTER(LIST_FIRST(..), ..) when returning itds to the freelist to
 prevent a crash when the freelist is empty. Reviewed by Jeremy Morse.

---
 sys/dev/usb/ehci.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sys/dev/usb/ehci.c b/sys/dev/usb/ehci.c
index 684da26952f3..99dff6f418d1 100644
--- a/sys/dev/usb/ehci.c
+++ b/sys/dev/usb/ehci.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ehci.c,v 1.149 2008/10/05 21:31:39 jmcneill Exp $ */
+/*	$NetBSD: ehci.c,v 1.150 2008/10/06 02:21:50 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2004-2008 The NetBSD Foundation, Inc.
@@ -52,7 +52,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ehci.c,v 1.149 2008/10/05 21:31:39 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ehci.c,v 1.150 2008/10/06 02:21:50 jmcneill Exp $");
 
 #include "ohci.h"
 #include "uhci.h"
@@ -2828,7 +2828,7 @@ ehci_free_itd(ehci_softc_t *sc, ehci_soft_itd_t *itd)
 	int s;
 
 	s = splusb();
-	LIST_INSERT_AFTER(LIST_FIRST(&sc->sc_freeitds), itd, u.free_list);
+	LIST_INSERT_HEAD(&sc->sc_freeitds, itd, u.free_list);
 	splx(s);
 }