Index: head/sys/net/if.c
===================================================================
--- head/sys/net/if.c
+++ head/sys/net/if.c
@@ -2300,7 +2300,7 @@
 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
 {
 	struct ifreq *ifr;
-	int error = 0;
+	int error = 0, do_ifup = 0;
 	int new_flags, temp_flags;
 	size_t namelen, onamelen;
 	size_t descrlen;
@@ -2427,7 +2427,7 @@
 			if_down(ifp);
 		} else if (new_flags & IFF_UP &&
 		    (ifp->if_flags & IFF_UP) == 0) {
-			if_up(ifp);
+			do_ifup = 1;
 		}
 		/* See if permanently promiscuous mode bit is about to flip */
 		if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
@@ -2446,6 +2446,8 @@
 		if (ifp->if_ioctl) {
 			(void) (*ifp->if_ioctl)(ifp, cmd, data);
 		}
+		if (do_ifup)
+			if_up(ifp);
 		getmicrotime(&ifp->if_lastchange);
 		break;