Index: if_em.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/em/if_em.c,v
retrieving revision 1.184
diff -u -r1.184 if_em.c
--- if_em.c	10 Sep 2007 21:50:40 -0000	1.184
+++ if_em.c	18 Nov 2007 05:42:35 -0000
@@ -1791,6 +1791,7 @@
 	m_head = *m_headp;
 
 	/* Do hardware assists */
+	txd_upper = txd_lower = 0;
 	if (em_tso_setup(adapter, m_head, &txd_upper, &txd_lower))
 		/* we need to make a final sentinel transmit desc */
 		tso_desc = TRUE;