Index: if_ix.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_ix.c,v
retrieving revision 1.99
diff -u -p -r1.99 if_ix.c
--- if_ix.c	26 Aug 2014 11:01:22 -0000	1.99
+++ if_ix.c	27 Aug 2014 11:16:53 -0000
@@ -441,18 +441,6 @@ ixgbe_ioctl(struct ifnet * ifp, u_long c
 #endif
 		break;
 
-	case SIOCSIFMTU:
-		IOCTL_DEBUGOUT("ioctl: SIOCSIFMTU (Set Interface MTU)");
-		if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > ifp->if_hardmtu)
-			error = EINVAL;
-		else if (ifp->if_mtu != ifr->ifr_mtu) {
-			ifp->if_mtu = ifr->ifr_mtu;
-			sc->max_frame_size =
-				ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
-			ixgbe_init(sc);
-		}
-		break;
-
 	case SIOCSIFFLAGS:
 		IOCTL_DEBUGOUT("ioctl: SIOCSIFFLAGS (Set Interface Flags)");
 		if (ifp->if_flags & IFF_UP) {
@@ -690,7 +678,7 @@ ixgbe_init(void *arg)
 	IXGBE_WRITE_REG(&sc->hw, IXGBE_GPIE, gpie);
 
 	/* Set MTU size */
-	if (ifp->if_mtu > ETHERMTU) {
+	if (ifp->if_hardmtu > ETHERMTU) {
 		mhadd = IXGBE_READ_REG(&sc->hw, IXGBE_MHADD);
 		mhadd &= ~IXGBE_MHADD_MFS_MASK;
 		mhadd |= sc->max_frame_size << IXGBE_MHADD_MFS_SHIFT;
@@ -1596,7 +1584,7 @@ ixgbe_setup_interface(struct ix_softc *s
 	ether_ifattach(ifp);
 
 	sc->max_frame_size =
-	    ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+	    ifp->if_hardmtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
 }
 
 void
@@ -2680,7 +2668,7 @@ ixgbe_initialize_receive_units(struct ix
 
 	/* Set for Jumbo Frames? */
 	hlreg = IXGBE_READ_REG(&sc->hw, IXGBE_HLREG0);
-	if (ifp->if_mtu > ETHERMTU)
+	if (ifp->if_hardmtu > ETHERMTU)
 		hlreg |= IXGBE_HLREG0_JUMBOEN;
 	else
 		hlreg &= ~IXGBE_HLREG0_JUMBOEN;