--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1685,17 +1685,20 @@ static void ath_tx_start_dma(struct ath_
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct list_head bf_head;
-	struct ath_atx_tid *tid;
+	struct ath_atx_tid *tid = NULL;
 	u8 tidno;
 
 	spin_lock_bh(&txctl->txq->axq_lock);
 
-	if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && txctl->an) {
+	if (ieee80211_is_data_qos(hdr->frame_control) && txctl->an) {
 		tidno = ieee80211_get_qos_ctl(hdr)[0] &
 			IEEE80211_QOS_CTL_TID_MASK;
 		tid = ATH_AN_2_TID(txctl->an, tidno);
 
 		WARN_ON(tid->ac->txq != txctl->txq);
+	}
+
+	if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
 		/*
 		 * Try aggregation if it's a unicast data frame
 		 * and the destination is HT capable.
@@ -1712,7 +1715,7 @@ static void ath_tx_start_dma(struct ath_
 			ar9003_hw_set_paprd_txdesc(sc->sc_ah, bf->bf_desc,
 						   bf->bf_state.bfs_paprd);
 
-		ath_tx_send_normal(sc, txctl->txq, NULL, &bf_head);
+		ath_tx_send_normal(sc, txctl->txq, tid, &bf_head);
 	}
 
 	spin_unlock_bh(&txctl->txq->axq_lock);
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -284,11 +284,9 @@ static void ath9k_hw_read_revisions(stru
 
 static void ath9k_hw_disablepcie(struct ath_hw *ah)
 {
-	if (AR_SREV_9100(ah))
+	if (!AR_SREV_5416(ah))
 		return;
 
-	ENABLE_REGWRITE_BUFFER(ah);
-
 	REG_WRITE(ah, AR_PCIE_SERDES, 0x9248fc00);
 	REG_WRITE(ah, AR_PCIE_SERDES, 0x24924924);
 	REG_WRITE(ah, AR_PCIE_SERDES, 0x28000029);
@@ -300,8 +298,6 @@ static void ath9k_hw_disablepcie(struct 
 	REG_WRITE(ah, AR_PCIE_SERDES, 0x000e1007);
 
 	REG_WRITE(ah, AR_PCIE_SERDES2, 0x00000000);
-
-	REGWRITE_BUFFER_FLUSH(ah);
 }
 
 /* This should work for all families including legacy */
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1940,7 +1940,9 @@ static u64 ath9k_get_tsf(struct ieee8021
 	struct ath_softc *sc = aphy->sc;
 
 	mutex_lock(&sc->mutex);
+	ath9k_ps_wakeup(sc);
 	tsf = ath9k_hw_gettsf64(sc->sc_ah);
+	ath9k_ps_restore(sc);
 	mutex_unlock(&sc->mutex);
 
 	return tsf;
@@ -1952,7 +1954,9 @@ static void ath9k_set_tsf(struct ieee802
 	struct ath_softc *sc = aphy->sc;
 
 	mutex_lock(&sc->mutex);
+	ath9k_ps_wakeup(sc);
 	ath9k_hw_settsf64(sc->sc_ah, tsf);
+	ath9k_ps_restore(sc);
 	mutex_unlock(&sc->mutex);
 }