Index: rt2560.c
===================================================================
RCS file: /cvs/src/sys/dev/ic/rt2560.c,v
retrieving revision 1.78
diff -u -p -r1.78 rt2560.c
--- rt2560.c	25 Nov 2015 03:09:58 -0000	1.78
+++ rt2560.c	4 Dec 2015 21:39:59 -0000
@@ -1947,7 +1947,6 @@ rt2560_start(struct ifnet *ifp)
 
 		} else {
 			if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) {
-				ifq_deq_rollback(&ifp->if_snd, m0);
 				ifq_set_oactive(&ifp->if_snd);
 				sc->sc_flags |= RT2560_DATA_OACTIVE;
 				break;