Index: if.c
===================================================================
RCS file: /cvs/src/sys/net/if.c,v
retrieving revision 1.319
diff -u -p -r1.319 if.c
--- if.c	9 Feb 2015 03:09:57 -0000	1.319
+++ if.c	23 Feb 2015 05:01:57 -0000
@@ -1753,15 +1753,7 @@ ifconf(u_long cmd, caddr_t data)
 void
 if_detached_start(struct ifnet *ifp)
 {
-	struct mbuf *m;
-
-	while (1) {
-		IF_DEQUEUE(&ifp->if_snd, m);
-
-		if (m == NULL)
-			return;
-		m_freem(m);
-	}
+	IFQ_PURGE(&ifp->if_snd);
 }
 
 int