Index: head/sys/dev/hyperv/netvsc/hv_net_vsc.h
===================================================================
--- head/sys/dev/hyperv/netvsc/hv_net_vsc.h
+++ head/sys/dev/hyperv/netvsc/hv_net_vsc.h
@@ -265,7 +265,6 @@
 /*
  * Externs
  */
-extern int hv_promisc_mode;
 struct hn_send_ctx;
 
 void netvsc_linkstatus_callback(struct hn_softc *sc, uint32_t status);
Index: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
===================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
@@ -205,8 +205,6 @@
  * Globals
  */
 
-int hv_promisc_mode = 0;    /* normal mode by default */
-
 SYSCTL_NODE(_hw, OID_AUTO, hn, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
     "Hyper-V network interface");
 
@@ -1779,7 +1777,7 @@
 hn_stop(struct hn_softc *sc)
 {
 	struct ifnet *ifp;
-	int ret, i;
+	int i;
 
 	HN_LOCK_ASSERT(sc);
 
@@ -1795,7 +1793,8 @@
 
 	if_link_state_change(ifp, LINK_STATE_DOWN);
 
-	ret = hv_rf_on_close(sc);
+	/* Disable RX by clearing RX filter. */
+	hn_rndis_set_rxfilter(sc, 0);
 }
 
 /*
@@ -1870,9 +1869,8 @@
 		return;
 	}
 
-	hv_promisc_mode = 1;
-
-	ret = hv_rf_on_open(sc);
+	/* TODO: add hn_rx_filter */
+	ret = hn_rndis_set_rxfilter(sc, NDIS_PACKET_TYPE_PROMISCUOUS);
 	if (ret != 0)
 		return;
 
@@ -3576,9 +3574,9 @@
 	}
 
 	/*
-	 * Disable RX.
+	 * Disable RX by clearing RX filter.
 	 */
-	hv_rf_on_close(sc);
+	hn_rndis_set_rxfilter(sc, 0);
 
 	/*
 	 * Give RNDIS enough time to flush all pending data packets.
@@ -3612,8 +3610,9 @@
 
 	/*
 	 * Re-enable RX.
+	 * TODO: add hn_rx_filter.
 	 */
-	hv_rf_on_open(sc);
+	hn_rndis_set_rxfilter(sc, NDIS_PACKET_TYPE_PROMISCUOUS);
 
 	/*
 	 * Make sure to clear suspend status on "all" TX rings,
Index: head/sys/dev/hyperv/netvsc/hv_rndis_filter.h
===================================================================
--- head/sys/dev/hyperv/netvsc/hv_rndis_filter.h
+++ head/sys/dev/hyperv/netvsc/hv_rndis_filter.h
@@ -43,8 +43,6 @@
 void hv_rf_on_receive(struct hn_softc *sc, struct hn_rx_ring *rxr,
     const void *data, int dlen);
 void hv_rf_channel_rollup(struct hn_rx_ring *rxr, struct hn_tx_ring *txr);
-int hv_rf_on_open(struct hn_softc *sc);
-int hv_rf_on_close(struct hn_softc *sc);
 
 #endif  /* __HV_RNDIS_FILTER_H__ */
 
Index: head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
===================================================================
--- head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
+++ head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
@@ -887,7 +887,7 @@
 	return (error);
 }
 
-static int
+int
 hn_rndis_set_rxfilter(struct hn_softc *sc, uint32_t filter)
 {
 	int error;
@@ -1013,35 +1013,6 @@
 	hn_rndis_halt(sc);
 }
 
-/*
- * RNDIS filter on open
- */
-int
-hv_rf_on_open(struct hn_softc *sc)
-{
-	uint32_t filter;
-
-	/* XXX */
-	if (hv_promisc_mode != 1) {
-		filter = NDIS_PACKET_TYPE_BROADCAST |
-		    NDIS_PACKET_TYPE_ALL_MULTICAST |
-		    NDIS_PACKET_TYPE_DIRECTED;
-	} else {
-		filter = NDIS_PACKET_TYPE_PROMISCUOUS;
-	}
-	return (hn_rndis_set_rxfilter(sc, filter));
-}
-
-/*
- * RNDIS filter on close
- */
-int 
-hv_rf_on_close(struct hn_softc *sc)
-{
-
-	return (hn_rndis_set_rxfilter(sc, 0));
-}
-
 void
 hv_rf_channel_rollup(struct hn_rx_ring *rxr, struct hn_tx_ring *txr)
 {
Index: head/sys/dev/hyperv/netvsc/if_hnvar.h
===================================================================
--- head/sys/dev/hyperv/netvsc/if_hnvar.h
+++ head/sys/dev/hyperv/netvsc/if_hnvar.h
@@ -126,6 +126,8 @@
 int		hn_rndis_get_eaddr(struct hn_softc *sc, uint8_t *eaddr);
 int		hn_rndis_get_linkstatus(struct hn_softc *sc,
 		    uint32_t *link_status);
+/* filter: NDIS_PACKET_TYPE_ or 0. */
+int		hn_rndis_set_rxfilter(struct hn_softc *sc, uint32_t filter);
 
 int		hn_nvs_attach(struct hn_softc *sc, int mtu);
 void		hn_nvs_detach(struct hn_softc *sc);