Index: sys/dev/iwn/if_iwn.c
===================================================================
--- sys/dev/iwn/if_iwn.c	(revision 307664)
+++ sys/dev/iwn/if_iwn.c	(working copy)
@@ -4903,6 +4903,8 @@
 
 	IWN_LOCK(sc);
 	if ((sc->sc_flags & IWN_FLAG_RUNNING) == 0) {
+		if (m->m_flags & M_TXCB)
+			ieee80211_process_callback(ni, m, 1);
 		m_freem(m);
 		IWN_UNLOCK(sc);
 		return (ENETDOWN);
@@ -4911,6 +4913,8 @@
 	/* queue frame if we have to */
 	if (sc->sc_beacon_wait) {
 		if (iwn_xmit_queue_enqueue(sc, m) != 0) {
+			if (m->m_flags & M_TXCB)
+				ieee80211_process_callback(ni, m, 1);
 			m_freem(m);
 			IWN_UNLOCK(sc);
 			return (ENOBUFS);
@@ -4935,8 +4939,11 @@
 	}
 	if (error == 0)
 		sc->sc_tx_timer = 5;
-	else
+	else {
+		if (m->m_flags & M_TXCB)
+			ieee80211_process_callback(ni, m, 1);
 		m_freem(m);
+	}
 
 	IWN_UNLOCK(sc);