1 files changed, 22 insertions, 758 deletions

diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index e1fcc68124d..12aca02228c 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -20,43 +20,6 @@
 
 #define SKB_CB_ATHBUF(__skb)	(*((struct ath_buf **)__skb->cb))
 
-static inline bool ath_is_alt_ant_ratio_better(int alt_ratio, int maxdelta,
-					       int mindelta, int main_rssi_avg,
-					       int alt_rssi_avg, int pkt_count)
-{
-	return (((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) &&
-		(alt_rssi_avg > main_rssi_avg + maxdelta)) ||
-		(alt_rssi_avg > main_rssi_avg + mindelta)) && (pkt_count > 50);
-}
-
-static inline bool ath_ant_div_comb_alt_check(u8 div_group, int alt_ratio,
-					int curr_main_set, int curr_alt_set,
-					int alt_rssi_avg, int main_rssi_avg)
-{
-	bool result = false;
-	switch (div_group) {
-	case 0:
-		if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)
-			result = true;
-		break;
-	case 1:
-	case 2:
-		if ((((curr_main_set == ATH_ANT_DIV_COMB_LNA2) &&
-			(curr_alt_set == ATH_ANT_DIV_COMB_LNA1) &&
-				(alt_rssi_avg >= (main_rssi_avg - 5))) ||
-			((curr_main_set == ATH_ANT_DIV_COMB_LNA1) &&
-			(curr_alt_set == ATH_ANT_DIV_COMB_LNA2) &&
-				(alt_rssi_avg >= (main_rssi_avg - 2)))) &&
-							(alt_rssi_avg >= 4))
-			result = true;
-		else
-			result = false;
-		break;
-	}
-
-	return result;
-}
-
 static inline bool ath9k_check_auto_sleep(struct ath_softc *sc)
 {
 	return sc->ps_enabled &&
@@ -303,7 +266,7 @@ static void ath_edma_start_recv(struct ath_softc *sc)
 
 	ath_opmode_init(sc);
 
-	ath9k_hw_startpcureceive(sc->sc_ah, (sc->sc_flags & SC_OP_OFFCHANNEL));
+	ath9k_hw_startpcureceive(sc->sc_ah, !!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL));
 
 	spin_unlock_bh(&sc->rx.rxbuflock);
 }
@@ -322,8 +285,8 @@ int ath_rx_init(struct ath_softc *sc, int nbufs)
 	int error = 0;
 
 	spin_lock_init(&sc->sc_pcu_lock);
-	sc->sc_flags &= ~SC_OP_RXFLUSH;
 	spin_lock_init(&sc->rx.rxbuflock);
+	clear_bit(SC_OP_RXFLUSH, &sc->sc_flags);
 
 	common->rx_bufsize = IEEE80211_MAX_MPDU_LEN / 2 +
 			     sc->sc_ah->caps.rx_status_len;
@@ -467,6 +430,9 @@ u32 ath_calcrxfilter(struct ath_softc *sc)
 		rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL;
 	}
 
+	if (AR_SREV_9550(sc->sc_ah))
+		rfilt |= ATH9K_RX_FILTER_4ADDRESS;
+
 	return rfilt;
 
 }
@@ -500,7 +466,7 @@ int ath_startrecv(struct ath_softc *sc)
 
 start_recv:
 	ath_opmode_init(sc);
-	ath9k_hw_startpcureceive(ah, (sc->sc_flags & SC_OP_OFFCHANNEL));
+	ath9k_hw_startpcureceive(ah, !!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL));
 
 	spin_unlock_bh(&sc->rx.rxbuflock);
 
@@ -535,11 +501,11 @@ bool ath_stoprecv(struct ath_softc *sc)
 
 void ath_flushrecv(struct ath_softc *sc)
 {
-	sc->sc_flags |= SC_OP_RXFLUSH;
+	set_bit(SC_OP_RXFLUSH, &sc->sc_flags);
 	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 		ath_rx_tasklet(sc, 1, true);
 	ath_rx_tasklet(sc, 1, false);
-	sc->sc_flags &= ~SC_OP_RXFLUSH;
+	clear_bit(SC_OP_RXFLUSH, &sc->sc_flags);
 }
 
 static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb)
@@ -587,7 +553,7 @@ static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb)
 		sc->ps_flags &= ~PS_BEACON_SYNC;
 		ath_dbg(common, PS,
 			"Reconfigure Beacon timers based on timestamp from the AP\n");
-		ath_set_beacon(sc);
+		ath9k_set_beacon(sc);
 	}
 
 	if (ath_beacon_dtim_pending_cab(skb)) {
@@ -624,13 +590,13 @@ static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb, bool mybeacon)
 
 	/* Process Beacon and CAB receive in PS state */
 	if (((sc->ps_flags & PS_WAIT_FOR_BEACON) || ath9k_check_auto_sleep(sc))
-	    && mybeacon)
+	    && mybeacon) {
 		ath_rx_ps_beacon(sc, skb);
-	else if ((sc->ps_flags & PS_WAIT_FOR_CAB) &&
-		 (ieee80211_is_data(hdr->frame_control) ||
-		  ieee80211_is_action(hdr->frame_control)) &&
-		 is_multicast_ether_addr(hdr->addr1) &&
-		 !ieee80211_has_moredata(hdr->frame_control)) {
+	} else if ((sc->ps_flags & PS_WAIT_FOR_CAB) &&
+		   (ieee80211_is_data(hdr->frame_control) ||
+		    ieee80211_is_action(hdr->frame_control)) &&
+		   is_multicast_ether_addr(hdr->addr1) &&
+		   !ieee80211_has_moredata(hdr->frame_control)) {
 		/*
 		 * No more broadcast/multicast frames to be received at this
 		 * point.
@@ -695,9 +661,9 @@ static bool ath_edma_get_buffers(struct ath_softc *sc,
 			__skb_unlink(skb, &rx_edma->rx_fifo);
 			list_add_tail(&bf->list, &sc->rx.rxbuf);
 			ath_rx_edma_buf_link(sc, qtype);
-		} else {
-			bf = NULL;
 		}
+
+		bf = NULL;
 	}
 
 	*dest = bf;
@@ -822,7 +788,8 @@ static bool ath9k_rx_accept(struct ath_common *common,
 	 * descriptor does contain a valid key index. This has been observed
 	 * mostly with CCMP encryption.
 	 */
-	if (rx_stats->rs_keyix == ATH9K_RXKEYIX_INVALID)
+	if (rx_stats->rs_keyix == ATH9K_RXKEYIX_INVALID ||
+	    !test_bit(rx_stats->rs_keyix, common->ccmp_keymap))
 		rx_stats->rs_status &= ~ATH9K_RXERR_KEYMISS;
 
 	if (!rx_stats->rs_datalen) {
@@ -1067,709 +1034,6 @@ static void ath9k_rx_skb_postprocess(struct ath_common *common,
 		rxs->flag &= ~RX_FLAG_DECRYPTED;
 }
 
-static void ath_lnaconf_alt_good_scan(struct ath_ant_comb *antcomb,
-				      struct ath_hw_antcomb_conf ant_conf,
-				      int main_rssi_avg)
-{
-	antcomb->quick_scan_cnt = 0;
-
-	if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA2)
-		antcomb->rssi_lna2 = main_rssi_avg;
-	else if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA1)
-		antcomb->rssi_lna1 = main_rssi_avg;
-
-	switch ((ant_conf.main_lna_conf << 4) | ant_conf.alt_lna_conf) {
-	case 0x10: /* LNA2 A-B */
-		antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-		antcomb->first_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-		antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1;
-		break;
-	case 0x20: /* LNA1 A-B */
-		antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-		antcomb->first_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-		antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2;
-		break;
-	case 0x21: /* LNA1 LNA2 */
-		antcomb->main_conf = ATH_ANT_DIV_COMB_LNA2;
-		antcomb->first_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-		antcomb->second_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-		break;
-	case 0x12: /* LNA2 LNA1 */
-		antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1;
-		antcomb->first_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-		antcomb->second_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-		break;
-	case 0x13: /* LNA2 A+B */
-		antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-		antcomb->first_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-		antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1;
-		break;
-	case 0x23: /* LNA1 A+B */
-		antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-		antcomb->first_quick_scan_conf =
-			ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-		antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2;
-		break;
-	default:
-		break;
-	}
-}
-
-static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb,
-				struct ath_hw_antcomb_conf *div_ant_conf,
-				int main_rssi_avg, int alt_rssi_avg,
-				int alt_ratio)
-{
-	/* alt_good */
-	switch (antcomb->quick_scan_cnt) {
-	case 0:
-		/* set alt to main, and alt to first conf */
-		div_ant_conf->main_lna_conf = antcomb->main_conf;
-		div_ant_conf->alt_lna_conf = antcomb->first_quick_scan_conf;
-		break;
-	case 1:
-		/* set alt to main, and alt to first conf */
-		div_ant_conf->main_lna_conf = antcomb->main_conf;
-		div_ant_conf->alt_lna_conf = antcomb->second_quick_scan_conf;
-		antcomb->rssi_first = main_rssi_avg;
-		antcomb->rssi_second = alt_rssi_avg;
-
-		if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) {
-			/* main is LNA1 */
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_HI,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
-						main_rssi_avg, alt_rssi_avg,
-						antcomb->total_pkt_count))
-				antcomb->first_ratio = true;
-			else
-				antcomb->first_ratio = false;
-		} else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) {
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_MID,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
-						main_rssi_avg, alt_rssi_avg,
-						antcomb->total_pkt_count))
-				antcomb->first_ratio = true;
-			else
-				antcomb->first_ratio = false;
-		} else {
-			if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) &&
-			    (alt_rssi_avg > main_rssi_avg +
-			    ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) ||
-			    (alt_rssi_avg > main_rssi_avg)) &&
-			    (antcomb->total_pkt_count > 50))
-				antcomb->first_ratio = true;
-			else
-				antcomb->first_ratio = false;
-		}
-		break;
-	case 2:
-		antcomb->alt_good = false;
-		antcomb->scan_not_start = false;
-		antcomb->scan = false;
-		antcomb->rssi_first = main_rssi_avg;
-		antcomb->rssi_third = alt_rssi_avg;
-
-		if (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1)
-			antcomb->rssi_lna1 = alt_rssi_avg;
-		else if (antcomb->second_quick_scan_conf ==
-			 ATH_ANT_DIV_COMB_LNA2)
-			antcomb->rssi_lna2 = alt_rssi_avg;
-		else if (antcomb->second_quick_scan_conf ==
-			 ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2) {
-			if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2)
-				antcomb->rssi_lna2 = main_rssi_avg;
-			else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1)
-				antcomb->rssi_lna1 = main_rssi_avg;
-		}
-
-		if (antcomb->rssi_lna2 > antcomb->rssi_lna1 +
-		    ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA)
-			div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
-		else
-			div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1;
-
-		if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) {
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_HI,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
-						main_rssi_avg, alt_rssi_avg,
-						antcomb->total_pkt_count))
-				antcomb->second_ratio = true;
-			else
-				antcomb->second_ratio = false;
-		} else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) {
-			if (ath_is_alt_ant_ratio_better(alt_ratio,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_MID,
-						ATH_ANT_DIV_COMB_LNA1_DELTA_LOW,
-						main_rssi_avg, alt_rssi_avg,
-						antcomb->total_pkt_count))
-				antcomb->second_ratio = true;
-			else
-				antcomb->second_ratio = false;
-		} else {
-			if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) &&
-			    (alt_rssi_avg > main_rssi_avg +
-			    ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) ||
-			    (alt_rssi_avg > main_rssi_avg)) &&
-			    (antcomb->total_pkt_count > 50))
-				antcomb->second_ratio = true;
-			else
-				antcomb->second_ratio = false;
-		}
-
-		/* set alt to the conf with maximun ratio */
-		if (antcomb->first_ratio && antcomb->second_ratio) {
-			if (antcomb->rssi_second > antcomb->rssi_third) {
-				/* first alt*/
-				if ((antcomb->first_quick_scan_conf ==
-				    ATH_ANT_DIV_COMB_LNA1) ||
-				    (antcomb->first_quick_scan_conf ==
-				    ATH_ANT_DIV_COMB_LNA2))
-					/* Set alt LNA1 or LNA2*/
-					if (div_ant_conf->main_lna_conf ==
-					    ATH_ANT_DIV_COMB_LNA2)
-						div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA1;
-					else
-						div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA2;
-				else
-					/* Set alt to A+B or A-B */
-					div_ant_conf->alt_lna_conf =
-						antcomb->first_quick_scan_conf;
-			} else if ((antcomb->second_quick_scan_conf ==
-				   ATH_ANT_DIV_COMB_LNA1) ||
-				   (antcomb->second_quick_scan_conf ==
-				   ATH_ANT_DIV_COMB_LNA2)) {
-				/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-			} else {
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf =
-					antcomb->second_quick_scan_conf;
-			}
-		} else if (antcomb->first_ratio) {
-			/* first alt */
-			if ((antcomb->first_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA1) ||
-			    (antcomb->first_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA2))
-					/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA2;
-			else
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf =
-						antcomb->first_quick_scan_conf;
-		} else if (antcomb->second_ratio) {
-				/* second alt */
-			if ((antcomb->second_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA1) ||
-			    (antcomb->second_quick_scan_conf ==
-			    ATH_ANT_DIV_COMB_LNA2))
-				/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-			else
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf =
-						antcomb->second_quick_scan_conf;
-		} else {
-			/* main is largest */
-			if ((antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) ||
-			    (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2))
-				/* Set alt LNA1 or LNA2 */
-				if (div_ant_conf->main_lna_conf ==
-				    ATH_ANT_DIV_COMB_LNA2)
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA1;
-				else
-					div_ant_conf->alt_lna_conf =
-							ATH_ANT_DIV_COMB_LNA2;
-			else
-				/* Set alt to A+B or A-B */
-				div_ant_conf->alt_lna_conf = antcomb->main_conf;
-		}
-		break;
-	default:
-		break;
-	}
-}
-
-static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf,
-		struct ath_ant_comb *antcomb, int alt_ratio)
-{
-	if (ant_conf->div_group == 0) {
-		/* Adjust the fast_div_bias based on main and alt lna conf */
-		switch ((ant_conf->main_lna_conf << 4) |
-				ant_conf->alt_lna_conf) {
-		case 0x01: /* A-B LNA2 */
-			ant_conf->fast_div_bias = 0x3b;
-			break;
-		case 0x02: /* A-B LNA1 */
-			ant_conf->fast_div_bias = 0x3d;
-			break;
-		case 0x03: /* A-B A+B */
-			ant_conf->fast_div_bias = 0x1;
-			break;
-		case 0x10: /* LNA2 A-B */
-			ant_conf->fast_div_bias = 0x7;
-			break;
-		case 0x12: /* LNA2 LNA1 */
-			ant_conf->fast_div_bias = 0x2;
-			break;
-		case 0x13: /* LNA2 A+B */
-			ant_conf->fast_div_bias = 0x7;
-			break;
-		case 0x20: /* LNA1 A-B */
-			ant_conf->fast_div_bias = 0x6;
-			break;
-		case 0x21: /* LNA1 LNA2 */
-			ant_conf->fast_div_bias = 0x0;
-			break;
-		case 0x23: /* LNA1 A+B */
-			ant_conf->fast_div_bias = 0x6;
-			break;
-		case 0x30: /* A+B A-B */
-			ant_conf->fast_div_bias = 0x1;
-			break;
-		case 0x31: /* A+B LNA2 */
-			ant_conf->fast_div_bias = 0x3b;
-			break;
-		case 0x32: /* A+B LNA1 */
-			ant_conf->fast_div_bias = 0x3d;
-			break;
-		default:
-			break;
-		}
-	} else if (ant_conf->div_group == 1) {
-		/* Adjust the fast_div_bias based on main and alt_lna_conf */
-		switch ((ant_conf->main_lna_conf << 4) |
-			ant_conf->alt_lna_conf) {
-		case 0x01: /* A-B LNA2 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x02: /* A-B LNA1 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x03: /* A-B A+B */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x10: /* LNA2 A-B */
-			if (!(antcomb->scan) &&
-			    (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x3f;
-			else
-				ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x12: /* LNA2 LNA1 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x13: /* LNA2 A+B */
-			if (!(antcomb->scan) &&
-			    (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x3f;
-			else
-				ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x20: /* LNA1 A-B */
-			if (!(antcomb->scan) &&
-			    (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x3f;
-			else
-				ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x21: /* LNA1 LNA2 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x23: /* LNA1 A+B */
-			if (!(antcomb->scan) &&
-			    (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x3f;
-			else
-				ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x30: /* A+B A-B */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x31: /* A+B LNA2 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x32: /* A+B LNA1 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		default:
-			break;
-		}
-	} else if (ant_conf->div_group == 2) {
-		/* Adjust the fast_div_bias based on main and alt_lna_conf */
-		switch ((ant_conf->main_lna_conf << 4) |
-				ant_conf->alt_lna_conf) {
-		case 0x01: /* A-B LNA2 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x02: /* A-B LNA1 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x03: /* A-B A+B */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x10: /* LNA2 A-B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x1;
-			else
-				ant_conf->fast_div_bias = 0x2;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x12: /* LNA2 LNA1 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x13: /* LNA2 A+B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x1;
-			else
-				ant_conf->fast_div_bias = 0x2;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x20: /* LNA1 A-B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x1;
-			else
-				ant_conf->fast_div_bias = 0x2;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x21: /* LNA1 LNA2 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x23: /* LNA1 A+B */
-			if (!(antcomb->scan) &&
-				(alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO))
-				ant_conf->fast_div_bias = 0x1;
-			else
-				ant_conf->fast_div_bias = 0x2;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x30: /* A+B A-B */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x31: /* A+B LNA2 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		case 0x32: /* A+B LNA1 */
-			ant_conf->fast_div_bias = 0x1;
-			ant_conf->main_gaintb = 0;
-			ant_conf->alt_gaintb = 0;
-			break;
-		default:
-			break;
-		}
-	}
-}
-
-/* Antenna diversity and combining */
-static void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs)
-{
-	struct ath_hw_antcomb_conf div_ant_conf;
-	struct ath_ant_comb *antcomb = &sc->ant_comb;
-	int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set;
-	int curr_main_set;
-	int main_rssi = rs->rs_rssi_ctl0;
-	int alt_rssi = rs->rs_rssi_ctl1;
-	int rx_ant_conf,  main_ant_conf;
-	bool short_scan = false;
-
-	rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
-		       ATH_ANT_RX_MASK;
-	main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) &
-			 ATH_ANT_RX_MASK;
-
-	/* Record packet only when both main_rssi and  alt_rssi is positive */
-	if (main_rssi > 0 && alt_rssi > 0) {
-		antcomb->total_pkt_count++;
-		antcomb->main_total_rssi += main_rssi;
-		antcomb->alt_total_rssi  += alt_rssi;
-		if (main_ant_conf == rx_ant_conf)
-			antcomb->main_recv_cnt++;
-		else
-			antcomb->alt_recv_cnt++;
-	}
-
-	/* Short scan check */
-	if (antcomb->scan && antcomb->alt_good) {
-		if (time_after(jiffies, antcomb->scan_start_time +
-		    msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR)))
-			short_scan = true;
-		else
-			if (antcomb->total_pkt_count ==
-			    ATH_ANT_DIV_COMB_SHORT_SCAN_PKTCOUNT) {
-				alt_ratio = ((antcomb->alt_recv_cnt * 100) /
-					    antcomb->total_pkt_count);
-				if (alt_ratio < ATH_ANT_DIV_COMB_ALT_ANT_RATIO)
-					short_scan = true;
-			}
-	}
-
-	if (((antcomb->total_pkt_count < ATH_ANT_DIV_COMB_MAX_PKTCOUNT) ||
-	    rs->rs_moreaggr) && !short_scan)
-		return;
-
-	if (antcomb->total_pkt_count) {
-		alt_ratio = ((antcomb->alt_recv_cnt * 100) /
-			     antcomb->total_pkt_count);
-		main_rssi_avg = (antcomb->main_total_rssi /
-				 antcomb->total_pkt_count);
-		alt_rssi_avg = (antcomb->alt_total_rssi /
-				 antcomb->total_pkt_count);
-	}
-
-
-	ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf);
-	curr_alt_set = div_ant_conf.alt_lna_conf;
-	curr_main_set = div_ant_conf.main_lna_conf;
-
-	antcomb->count++;
-
-	if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) {
-		if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) {
-			ath_lnaconf_alt_good_scan(antcomb, div_ant_conf,
-						  main_rssi_avg);
-			antcomb->alt_good = true;
-		} else {
-			antcomb->alt_good = false;
-		}
-
-		antcomb->count = 0;
-		antcomb->scan = true;
-		antcomb->scan_not_start = true;
-	}
-
-	if (!antcomb->scan) {
-		if (ath_ant_div_comb_alt_check(div_ant_conf.div_group,
-					alt_ratio, curr_main_set, curr_alt_set,
-					alt_rssi_avg, main_rssi_avg)) {
-			if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) {
-				/* Switch main and alt LNA */
-				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-				div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA1;
-			} else if (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) {
-				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA2;
-			}
-
-			goto div_comb_done;
-		} else if ((curr_alt_set != ATH_ANT_DIV_COMB_LNA1) &&
-			   (curr_alt_set != ATH_ANT_DIV_COMB_LNA2)) {
-			/* Set alt to another LNA */
-			if (curr_main_set == ATH_ANT_DIV_COMB_LNA2)
-				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-			else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1)
-				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-
-			goto div_comb_done;
-		}
-
-		if ((alt_rssi_avg < (main_rssi_avg +
-						div_ant_conf.lna1_lna2_delta)))
-			goto div_comb_done;
-	}
-
-	if (!antcomb->scan_not_start) {
-		switch (curr_alt_set) {
-		case ATH_ANT_DIV_COMB_LNA2:
-			antcomb->rssi_lna2 = alt_rssi_avg;
-			antcomb->rssi_lna1 = main_rssi_avg;
-			antcomb->scan = true;
-			/* set to A+B */
-			div_ant_conf.main_lna_conf =
-				ATH_ANT_DIV_COMB_LNA1;
-			div_ant_conf.alt_lna_conf  =
-				ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-			break;
-		case ATH_ANT_DIV_COMB_LNA1:
-			antcomb->rssi_lna1 = alt_rssi_avg;
-			antcomb->rssi_lna2 = main_rssi_avg;
-			antcomb->scan = true;
-			/* set to A+B */
-			div_ant_conf.main_lna_conf = ATH_ANT_DIV_COMB_LNA2;
-			div_ant_conf.alt_lna_conf  =
-				ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-			break;
-		case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2:
-			antcomb->rssi_add = alt_rssi_avg;
-			antcomb->scan = true;
-			/* set to A-B */
-			div_ant_conf.alt_lna_conf =
-				ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-			break;
-		case ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2:
-			antcomb->rssi_sub = alt_rssi_avg;
-			antcomb->scan = false;
-			if (antcomb->rssi_lna2 >
-			    (antcomb->rssi_lna1 +
-			    ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA)) {
-				/* use LNA2 as main LNA */
-				if ((antcomb->rssi_add > antcomb->rssi_lna1) &&
-				    (antcomb->rssi_add > antcomb->rssi_sub)) {
-					/* set to A+B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-					div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-				} else if (antcomb->rssi_sub >
-					   antcomb->rssi_lna1) {
-					/* set to A-B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-				} else {
-					/* set to LNA1 */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				}
-			} else {
-				/* use LNA1 as main LNA */
-				if ((antcomb->rssi_add > antcomb->rssi_lna2) &&
-				    (antcomb->rssi_add > antcomb->rssi_sub)) {
-					/* set to A+B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-					div_ant_conf.alt_lna_conf  =
-						ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2;
-				} else if (antcomb->rssi_sub >
-					   antcomb->rssi_lna1) {
-					/* set to A-B */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2;
-				} else {
-					/* set to LNA2 */
-					div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-					div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-				}
-			}
-			break;
-		default:
-			break;
-		}
-	} else {
-		if (!antcomb->alt_good) {
-			antcomb->scan_not_start = false;
-			/* Set alt to another LNA */
-			if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) {
-				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-			} else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) {
-				div_ant_conf.main_lna_conf =
-						ATH_ANT_DIV_COMB_LNA1;
-				div_ant_conf.alt_lna_conf =
-						ATH_ANT_DIV_COMB_LNA2;
-			}
-			goto div_comb_done;
-		}
-	}
-
-	ath_select_ant_div_from_quick_scan(antcomb, &div_ant_conf,
-					   main_rssi_avg, alt_rssi_avg,
-					   alt_ratio);
-
-	antcomb->quick_scan_cnt++;
-
-div_comb_done:
-	ath_ant_div_conf_fast_divbias(&div_ant_conf, antcomb, alt_ratio);
-	ath9k_hw_antdiv_comb_conf_set(sc->sc_ah, &div_ant_conf);
-
-	antcomb->scan_start_time = jiffies;
-	antcomb->total_pkt_count = 0;
-	antcomb->main_total_rssi = 0;
-	antcomb->alt_total_rssi = 0;
-	antcomb->main_recv_cnt = 0;
-	antcomb->alt_recv_cnt = 0;
-}
-
 int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 {
 	struct ath_buf *bf;
@@ -1803,7 +1067,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 
 	do {
 		/* If handling rx interrupt and flush is in progress => exit */
-		if ((sc->sc_flags & SC_OP_RXFLUSH) && (flush == 0))
+		if (test_bit(SC_OP_RXFLUSH, &sc->sc_flags) && (flush == 0))
 			break;
 
 		memset(&rs, 0, sizeof(rs));
@@ -1841,13 +1105,14 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 		else
 			rs.is_mybeacon = false;
 
+		sc->rx.num_pkts++;
 		ath_debug_stat_rx(sc, &rs);
 
 		/*
 		 * If we're asked to flush receive queue, directly
 		 * chain it back at the queue without processing it.
 		 */
-		if (sc->sc_flags & SC_OP_RXFLUSH) {
+		if (test_bit(SC_OP_RXFLUSH, &sc->sc_flags)) {
 			RX_STAT_INC(rx_drop_rxflush);
 			goto requeue_drop_frag;
 		}
@@ -1968,7 +1233,6 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 			skb_trim(skb, skb->len - 8);
 
 		spin_lock_irqsave(&sc->sc_pm_lock, flags);
-
 		if ((sc->ps_flags & (PS_WAIT_FOR_BEACON |
 				     PS_WAIT_FOR_CAB |
 				     PS_WAIT_FOR_PSPOLL_DATA)) ||