Index: if_bfe.c
===================================================================
RCS file: /usr/store/mlaier/fcvs/src/sys/dev/bfe/if_bfe.c,v
retrieving revision 1.16
diff -u -r1.16 if_bfe.c
--- if_bfe.c	1 Sep 2004 06:10:11 -0000	1.16
+++ if_bfe.c	6 Oct 2004 09:59:52 -0000
@@ -1357,7 +1357,7 @@
 {
 	struct bfe_softc *sc;
 	struct mbuf *m_head = NULL;
-	int idx;
+	int idx, queued = 0;
 
 	sc = ifp->if_softc;
 	idx = sc->bfe_tx_prod;
@@ -1398,17 +1398,22 @@
 		 * to him.
 		 */
 		BPF_MTAP(ifp, m_head);
+
+		queued++;
 	}
 
-	sc->bfe_tx_prod = idx;
-	/* Transmit - twice due to apparent hardware bug */
-	CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc));
-	CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc));
+	if (queued) {
+		sc->bfe_tx_prod = idx;
+		/* Transmit - twice due to apparent hardware bug */
+		CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc));
+		CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc));
+
+		/*
+		 * Set a timeout in case the chip goes out to lunch.
+		 */
+		ifp->if_timer = 5;
+	}
 
-	/*
-	 * Set a timeout in case the chip goes out to lunch.
-	 */
-	ifp->if_timer = 5;
 	BFE_UNLOCK(sc);
 }