Index: sys/dev/e1000/if_em.c
===================================================================
--- sys/dev/e1000/if_em.c
+++ sys/dev/e1000/if_em.c
@@ -1340,23 +1340,8 @@
 	adapter->rx_mbuf_sz = iflib_get_rx_mbuf_sz(ctx);
 	em_initialize_receive_unit(ctx);
 
-	/* Use real VLAN Filter support? */
-	if (if_getcapenable(ifp) & IFCAP_VLAN_HWTAGGING) {
-		if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
-			/* Use real VLAN Filter support */
-			em_setup_vlan_hw_support(adapter);
-		else {
-			u32 ctrl;
-			ctrl = E1000_READ_REG(&adapter->hw, E1000_CTRL);
-			ctrl |= E1000_CTRL_VME;
-			E1000_WRITE_REG(&adapter->hw, E1000_CTRL, ctrl);
-		}
-	} else {
-		u32 ctrl;
-		ctrl = E1000_READ_REG(&adapter->hw, E1000_CTRL);
-		ctrl &= ~E1000_CTRL_VME;
-		E1000_WRITE_REG(&adapter->hw, E1000_CTRL, ctrl);
-	}
+	/* Set up VLAN support and filter */
+	em_setup_vlan_hw_support(adapter);
 
 	/* Don't lose promiscuous settings */
 	em_if_set_promisc(ctx, if_getflags(ifp));
@@ -3411,6 +3396,7 @@
 	bit = vtag & 0x1F;
 	adapter->shadow_vfta[index] |= (1 << bit);
 	++adapter->num_vlans;
+	em_setup_vlan_hw_support(adapter);
 }
 
 static void
@@ -3423,11 +3409,13 @@
 	bit = vtag & 0x1F;
 	adapter->shadow_vfta[index] &= ~(1 << bit);
 	--adapter->num_vlans;
+	em_setup_vlan_hw_support(adapter);
 }
 
 static void
 em_setup_vlan_hw_support(struct adapter *adapter)
 {
+	struct ifnet *ifp = iflib_get_ifp(adapter->ctx);
 	struct e1000_hw *hw = &adapter->hw;
 	u32 reg;
 
@@ -3440,24 +3428,54 @@
 	if (adapter->num_vlans == 0)
 		return;
 
+	if (adapter->vf_ifp) {
+		e1000_rlpml_set_vf(hw,
+		    adapter->shared->isc_max_frame_size + VLAN_TAG_SIZE);
+		return;
+	}
+
+	if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING &&
+	    !em_disable_crc_stripping) {
+		reg = E1000_READ_REG(hw, E1000_CTRL);
+		reg |= E1000_CTRL_VME;
+		E1000_WRITE_REG(hw, E1000_CTRL, reg);
+	} else {
+		reg = E1000_READ_REG(hw, E1000_CTRL);
+		reg &= ~E1000_CTRL_VME;
+		E1000_WRITE_REG(hw, E1000_CTRL, reg);
+	}
+
+	/* If we aren't doing HW filtering, we're done */
+	if ((ifp->if_capenable & IFCAP_VLAN_HWFILTER) == 0 ||
+	    em_disable_crc_stripping)
+		return;
+
+	/* Disable interrupts for lem-class devices during the filter change */
+	if (hw->mac.type < em_mac_min)
+		em_if_intr_disable(adapter->ctx);
+
 	/*
 	 * A soft reset zero's out the VFTA, so
 	 * we need to repopulate it now.
 	 */
-	for (int i = 0; i < EM_VFTA_SIZE; i++)
-		if (adapter->shadow_vfta[i] != 0)
-			E1000_WRITE_REG_ARRAY(hw, E1000_VFTA,
-			    i, adapter->shadow_vfta[i]);
 
-	reg = E1000_READ_REG(hw, E1000_CTRL);
-	reg |= E1000_CTRL_VME;
-	E1000_WRITE_REG(hw, E1000_CTRL, reg);
+	for (int i = 0; i < EM_VFTA_SIZE; i++)
+		if (adapter->shadow_vfta[i] != 0) {
+			if (adapter->vf_ifp)
+				e1000_vfta_set_vf(hw, adapter->shadow_vfta[i], TRUE);
+			else
+				e1000_write_vfta(hw, i, adapter->shadow_vfta[i]);
+		}
 
 	/* Enable the Filter Table */
 	reg = E1000_READ_REG(hw, E1000_RCTL);
 	reg &= ~E1000_RCTL_CFIEN;
 	reg |= E1000_RCTL_VFE;
 	E1000_WRITE_REG(hw, E1000_RCTL, reg);
+
+	/* Re-enable interrupts for lem-class devices */
+	if (hw->mac.type < em_mac_min)
+		em_if_intr_enable(adapter->ctx);
 }
 
 static void
@@ -4088,6 +4106,7 @@
 {
 	switch (event) {
 	case IFLIB_RESTART_VLAN_CONFIG:
+		return (false);
 	default:
 		return (true);
 	}