From c7edeb2b4f7122f9ec6f685b7b39d1b09bf6447d Mon Sep 17 00:00:00 2001
From: thorpej <thorpej@NetBSD.org>
Date: Wed, 25 Jul 2001 03:05:33 +0000
Subject: [PATCH] If we change the MTU, kick the interface; it may have to
 reprogram registers for the new MTU.

---
 sys/net/if_ethersubr.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
index c5431ec438b0..1984aab9e993 100644
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_ethersubr.c,v 1.86 2001/06/29 18:12:09 thorpej Exp $	*/
+/*	$NetBSD: if_ethersubr.c,v 1.87 2001/07/25 03:05:33 thorpej Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -1410,6 +1410,10 @@ ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 			error = EINVAL;
 		else
 			ifp->if_mtu = ifr->ifr_mtu;
+
+		/* Make sure the device notices the MTU change. */
+		if (ifp->if_flags & IFF_UP)
+			error = (*ifp->if_init)(ifp);
 		break;
 	    }