diff --git a/sys/dev/ath/if_ath_ahb.c b/sys/dev/ath/if_ath_ahb.c
index ec94ba80bde5..1d8d7ac846e2 100644
--- a/sys/dev/ath/if_ath_ahb.c
+++ b/sys/dev/ath/if_ath_ahb.c
@@ -194,11 +194,13 @@ ath_ahb_attach(device_t dev)
 	ATH_LOCK_INIT(sc);
 	ATH_PCU_LOCK_INIT(sc);
 	ATH_RX_LOCK_INIT(sc);
+	ATH_TXSTATUS_LOCK_INIT(sc);
 
 	error = ath_attach(AR9130_DEVID, sc);
 	if (error == 0)					/* success */
 		return 0;
 
+	ATH_TXSTATUS_LOCK_DESTROY(sc);
 	ATH_RX_LOCK_DESTROY(sc);
 	ATH_PCU_LOCK_DESTROY(sc);
 	ATH_LOCK_DESTROY(sc);
@@ -240,6 +242,7 @@ ath_ahb_detach(device_t dev)
 	if (sc->sc_eepromdata)
 		free(sc->sc_eepromdata, M_TEMP);
 
+	ATH_TXSTATUS_LOCK_DESTROY(sc);
 	ATH_RX_LOCK_DESTROY(sc);
 	ATH_PCU_LOCK_DESTROY(sc);
 	ATH_LOCK_DESTROY(sc);
diff --git a/sys/dev/ath/if_ath_pci.c b/sys/dev/ath/if_ath_pci.c
index 6b4c9bde5e99..5973dc38bf3e 100644
--- a/sys/dev/ath/if_ath_pci.c
+++ b/sys/dev/ath/if_ath_pci.c
@@ -250,11 +250,13 @@ ath_pci_attach(device_t dev)
 	ATH_LOCK_INIT(sc);
 	ATH_PCU_LOCK_INIT(sc);
 	ATH_RX_LOCK_INIT(sc);
+	ATH_TXSTATUS_LOCK_INIT(sc);
 
 	error = ath_attach(pci_get_device(dev), sc);
 	if (error == 0)					/* success */
 		return 0;
 
+	ATH_TXSTATUS_LOCK_DESTROY(sc);
 	ATH_PCU_LOCK_DESTROY(sc);
 	ATH_RX_LOCK_DESTROY(sc);
 	ATH_LOCK_DESTROY(sc);
@@ -295,6 +297,7 @@ ath_pci_detach(device_t dev)
 	if (sc->sc_eepromdata)
 		free(sc->sc_eepromdata, M_TEMP);
 
+	ATH_TXSTATUS_LOCK_DESTROY(sc);
 	ATH_PCU_LOCK_DESTROY(sc);
 	ATH_RX_LOCK_DESTROY(sc);
 	ATH_LOCK_DESTROY(sc);
diff --git a/sys/dev/ath/if_athvar.h b/sys/dev/ath/if_athvar.h
index 7ba0b77f53c1..1aea08b882e5 100644
--- a/sys/dev/ath/if_athvar.h
+++ b/sys/dev/ath/if_athvar.h
@@ -558,6 +558,11 @@ struct ath_softc {
 	struct ath_txq		*sc_ac2q[5];	/* WME AC -> h/w q map */ 
 	struct task		sc_txtask;	/* tx int processing */
 	struct task		sc_txqtask;	/* tx proc processing */
+
+	struct ath_descdma	sc_txcompdma;	/* TX EDMA completion */
+	struct mtx		sc_txcomplock;	/* TX EDMA completion lock */
+	char			sc_txcompname[12];	/* eg ath0_txcomp */
+
 	int			sc_wd_timer;	/* count down for wd timer */
 	struct callout		sc_wd_ch;	/* tx watchdog timer */
 	struct ath_tx_radiotap_header sc_tx_th;
@@ -735,6 +740,19 @@ struct ath_softc {
 #define	ATH_TXBUF_LOCK_ASSERT(_sc) \
 	mtx_assert(&(_sc)->sc_txbuflock, MA_OWNED)
 
+#define	ATH_TXSTATUS_LOCK_INIT(_sc) do { \
+	snprintf((_sc)->sc_txcompname, sizeof((_sc)->sc_txcompname), \
+		"%s_buf", \
+		device_get_nameunit((_sc)->sc_dev)); \
+	mtx_init(&(_sc)->sc_txcomplock, (_sc)->sc_txcompname, NULL, \
+		MTX_DEF); \
+} while (0)
+#define	ATH_TXSTATUS_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->sc_txcomplock)
+#define	ATH_TXSTATUS_LOCK(_sc)		mtx_lock(&(_sc)->sc_txcomplock)
+#define	ATH_TXSTATUS_UNLOCK(_sc)	mtx_unlock(&(_sc)->sc_txcomplock)
+#define	ATH_TXSTATUS_LOCK_ASSERT(_sc) \
+	mtx_assert(&(_sc)->sc_txcomplock, MA_OWNED)
+
 int	ath_attach(u_int16_t, struct ath_softc *);
 int	ath_detach(struct ath_softc *);
 void	ath_resume(struct ath_softc *);