Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Add TX fast path in mac80211, from Johannes Berg.

 2) Add TSO/GRO support to ibmveth, from Thomas Falcon

 3) Move away from cached routes in ipv6, just like ipv4, from Martin
    KaFai Lau.

 4) Lots of new rhashtable tests, from Thomas Graf.

 5) Run ingress qdisc lockless, from Alexei Starovoitov.

 6) Allow servers to fetch TCP packet headers for SYN packets of new
    connections, for fingerprinting.  From Eric Dumazet.

 7) Add mode parameter to pktgen, for testing receive.  From Alexei
    Starovoitov.

 8) Cache access optimizations via simplifications of build_skb(), from
    Alexander Duyck.

 9) Move page frag allocator under mm/, also from Alexander.

10) Add xmit_more support to hv_netvsc, from KY Srinivasan.

11) Add a counter guard in case we try to perform endless reclassify
    loops in the packet scheduler.

12) Extern flow dissector to be programmable and use it in new "Flower"
    classifier.  From Jiri Pirko.

13) AF_PACKET fanout rollover fixes, performance improvements, and new
    statistics.  From Willem de Bruijn.

14) Add netdev driver for GENEVE tunnels, from John W Linville.

15) Add ingress netfilter hooks and filtering, from Pablo Neira Ayuso.

16) Fix handling of epoll edge triggers in TCP, from Eric Dumazet.

17) Add an ECN retry fallback for the initial TCP handshake, from Daniel
    Borkmann.

18) Add tail call support to BPF, from Alexei Starovoitov.

19) Add several pktgen helper scripts, from Jesper Dangaard Brouer.

20) Add zerocopy support to AF_UNIX, from Hannes Frederic Sowa.

21) Favor even port numbers for allocation to connect() requests, and
    odd port numbers for bind(0), in an effort to help avoid
    ip_local_port_range exhaustion.  From Eric Dumazet.

22) Add Cavium ThunderX driver, from Sunil Goutham.

23) Allow bpf programs to access skb_iif and dev->ifindex SKB metadata,
    from Alexei Starovoitov.

24) Add support for T6 chips in cxgb4vf driver, from Hariprasad Shenai.

25) Double TCP Small Queues default to 256K to accomodate situations
    like the XEN driver and wireless aggregation.  From Wei Liu.

26) Add more entropy inputs to flow dissector, from Tom Herbert.

27) Add CDG congestion control algorithm to TCP, from Kenneth Klette
    Jonassen.

28) Convert ipset over to RCU locking, from Jozsef Kadlecsik.

29) Track and act upon link status of ipv4 route nexthops, from Andy
    Gospodarek.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1670 commits)
  bridge: vlan: flush the dynamically learned entries on port vlan delete
  bridge: multicast: add a comment to br_port_state_selection about blocking state
  net: inet_diag: export IPV6_V6ONLY sockopt
  stmmac: troubleshoot unexpected bits in des0 & des1
  net: ipv4 sysctl option to ignore routes when nexthop link is down
  net: track link-status of ipv4 nexthops
  net: switchdev: ignore unsupported bridge flags
  net: Cavium: Fix MAC address setting in shutdown state
  drivers: net: xgene: fix for ACPI support without ACPI
  ip: report the original address of ICMP messages
  net/mlx5e: Prefetch skb data on RX
  net/mlx5e: Pop cq outside mlx5e_get_cqe
  net/mlx5e: Remove mlx5e_cq.sqrq back-pointer
  net/mlx5e: Remove extra spaces
  net/mlx5e: Avoid TX CQE generation if more xmit packets expected
  net/mlx5e: Avoid redundant dev_kfree_skb() upon NOP completion
  net/mlx5e: Remove re-assignment of wq type in mlx5e_enable_rq()
  net/mlx5e: Use skb_shinfo(skb)->gso_segs rather than counting them
  net/mlx5e: Static mapping of netdev priv resources to/from netdev TX queues
  net/mlx4_en: Use HW counters for rx/tx bytes/packets in PF device
  ...

13 files changed, 806 insertions, 395 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
index 6c23d279525f..8f8793004b9f 100644
--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
@@ -254,86 +254,25 @@ static int ar5008_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
 	return 0;
 }
 
-/**
- * ar5008_hw_spur_mitigate - convert baseband spur frequency for external radios
- * @ah: atheros hardware structure
- * @chan:
- *
- * For non single-chip solutions. Converts to baseband spur frequency given the
- * input channel frequency and compute register settings below.
- */
-static void ar5008_hw_spur_mitigate(struct ath_hw *ah,
-				    struct ath9k_channel *chan)
+void ar5008_hw_cmn_spur_mitigate(struct ath_hw *ah,
+			  struct ath9k_channel *chan, int bin)
 {
-	int bb_spur = AR_NO_SPUR;
-	int bin, cur_bin;
-	int spur_freq_sd;
-	int spur_delta_phase;
-	int denominator;
+	int cur_bin;
 	int upper, lower, cur_vit_mask;
-	int tmp, new;
 	int i;
-	static int pilot_mask_reg[4] = {
+	int8_t mask_m[123];
+	int8_t mask_p[123];
+	int8_t mask_amt;
+	int tmp_mask;
+	static const int pilot_mask_reg[4] = {
 		AR_PHY_TIMING7, AR_PHY_TIMING8,
 		AR_PHY_PILOT_MASK_01_30, AR_PHY_PILOT_MASK_31_60
 	};
-	static int chan_mask_reg[4] = {
+	static const int chan_mask_reg[4] = {
 		AR_PHY_TIMING9, AR_PHY_TIMING10,
 		AR_PHY_CHANNEL_MASK_01_30, AR_PHY_CHANNEL_MASK_31_60
 	};
-	static int inc[4] = { 0, 100, 0, 0 };
-
-	int8_t mask_m[123];
-	int8_t mask_p[123];
-	int8_t mask_amt;
-	int tmp_mask;
-	int cur_bb_spur;
-	bool is2GHz = IS_CHAN_2GHZ(chan);
-
-	memset(&mask_m, 0, sizeof(int8_t) * 123);
-	memset(&mask_p, 0, sizeof(int8_t) * 123);
-
-	for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
-		cur_bb_spur = ah->eep_ops->get_spur_channel(ah, i, is2GHz);
-		if (AR_NO_SPUR == cur_bb_spur)
-			break;
-		cur_bb_spur = cur_bb_spur - (chan->channel * 10);
-		if ((cur_bb_spur > -95) && (cur_bb_spur < 95)) {
-			bb_spur = cur_bb_spur;
-			break;
-		}
-	}
-
-	if (AR_NO_SPUR == bb_spur)
-		return;
-
-	bin = bb_spur * 32;
-
-	tmp = REG_READ(ah, AR_PHY_TIMING_CTRL4(0));
-	new = tmp | (AR_PHY_TIMING_CTRL4_ENABLE_SPUR_RSSI |
-		     AR_PHY_TIMING_CTRL4_ENABLE_SPUR_FILTER |
-		     AR_PHY_TIMING_CTRL4_ENABLE_CHAN_MASK |
-		     AR_PHY_TIMING_CTRL4_ENABLE_PILOT_MASK);
-
-	REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0), new);
-
-	new = (AR_PHY_SPUR_REG_MASK_RATE_CNTL |
-	       AR_PHY_SPUR_REG_ENABLE_MASK_PPM |
-	       AR_PHY_SPUR_REG_MASK_RATE_SELECT |
-	       AR_PHY_SPUR_REG_ENABLE_VIT_SPUR_RSSI |
-	       SM(SPUR_RSSI_THRESH, AR_PHY_SPUR_REG_SPUR_RSSI_THRESH));
-	REG_WRITE(ah, AR_PHY_SPUR_REG, new);
-
-	spur_delta_phase = ((bb_spur * 524288) / 100) &
-		AR_PHY_TIMING11_SPUR_DELTA_PHASE;
-
-	denominator = IS_CHAN_2GHZ(chan) ? 440 : 400;
-	spur_freq_sd = ((bb_spur * 2048) / denominator) & 0x3ff;
-
-	new = (AR_PHY_TIMING11_USE_SPUR_IN_AGC |
-	       SM(spur_freq_sd, AR_PHY_TIMING11_SPUR_FREQ_SD) |
-	       SM(spur_delta_phase, AR_PHY_TIMING11_SPUR_DELTA_PHASE));
-	REG_WRITE(ah, AR_PHY_TIMING11, new);
+	static const int inc[4] = { 0, 100, 0, 0 };
 
 	cur_bin = -6000;
 	upper = bin + 100;
@@ -343,6 +282,7 @@ static void ar5008_hw_spur_mitigate(struct ath_hw *ah,
 		int pilot_mask = 0;
 		int chan_mask = 0;
 		int bp = 0;
+
 		for (bp = 0; bp < 30; bp++) {
 			if ((cur_bin > lower) && (cur_bin < upper)) {
 				pilot_mask = pilot_mask | 0x1 << bp;
@@ -361,7 +301,6 @@ static void ar5008_hw_spur_mitigate(struct ath_hw *ah,
 
 	for (i = 0; i < 123; i++) {
 		if ((cur_vit_mask > lower) && (cur_vit_mask < upper)) {
-
 			/* workaround for gcc bug #37014 */
 			volatile int tmp_v = abs(cur_vit_mask - bin);
 
@@ -467,6 +406,78 @@ static void ar5008_hw_spur_mitigate(struct ath_hw *ah,
 }
 
 /**
+ * ar5008_hw_spur_mitigate - convert baseband spur frequency for external radios
+ * @ah: atheros hardware structure
+ * @chan:
+ *
+ * For non single-chip solutions. Converts to baseband spur frequency given the
+ * input channel frequency and compute register settings below.
+ */
+static void ar5008_hw_spur_mitigate(struct ath_hw *ah,
+				    struct ath9k_channel *chan)
+{
+	int bb_spur = AR_NO_SPUR;
+	int bin;
+	int spur_freq_sd;
+	int spur_delta_phase;
+	int denominator;
+	int tmp, new;
+	int i;
+
+	int8_t mask_m[123];
+	int8_t mask_p[123];
+	int cur_bb_spur;
+	bool is2GHz = IS_CHAN_2GHZ(chan);
+
+	memset(&mask_m, 0, sizeof(int8_t) * 123);
+	memset(&mask_p, 0, sizeof(int8_t) * 123);
+
+	for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
+		cur_bb_spur = ah->eep_ops->get_spur_channel(ah, i, is2GHz);
+		if (AR_NO_SPUR == cur_bb_spur)
+			break;
+		cur_bb_spur = cur_bb_spur - (chan->channel * 10);
+		if ((cur_bb_spur > -95) && (cur_bb_spur < 95)) {
+			bb_spur = cur_bb_spur;
+			break;
+		}
+	}
+
+	if (AR_NO_SPUR == bb_spur)
+		return;
+
+	bin = bb_spur * 32;
+
+	tmp = REG_READ(ah, AR_PHY_TIMING_CTRL4(0));
+	new = tmp | (AR_PHY_TIMING_CTRL4_ENABLE_SPUR_RSSI |
+		     AR_PHY_TIMING_CTRL4_ENABLE_SPUR_FILTER |
+		     AR_PHY_TIMING_CTRL4_ENABLE_CHAN_MASK |
+		     AR_PHY_TIMING_CTRL4_ENABLE_PILOT_MASK);
+
+	REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0), new);
+
+	new = (AR_PHY_SPUR_REG_MASK_RATE_CNTL |
+	       AR_PHY_SPUR_REG_ENABLE_MASK_PPM |
+	       AR_PHY_SPUR_REG_MASK_RATE_SELECT |
+	       AR_PHY_SPUR_REG_ENABLE_VIT_SPUR_RSSI |
+	       SM(SPUR_RSSI_THRESH, AR_PHY_SPUR_REG_SPUR_RSSI_THRESH));
+	REG_WRITE(ah, AR_PHY_SPUR_REG, new);
+
+	spur_delta_phase = ((bb_spur * 524288) / 100) &
+		AR_PHY_TIMING11_SPUR_DELTA_PHASE;
+
+	denominator = IS_CHAN_2GHZ(chan) ? 440 : 400;
+	spur_freq_sd = ((bb_spur * 2048) / denominator) & 0x3ff;
+
+	new = (AR_PHY_TIMING11_USE_SPUR_IN_AGC |
+	       SM(spur_freq_sd, AR_PHY_TIMING11_SPUR_FREQ_SD) |
+	       SM(spur_delta_phase, AR_PHY_TIMING11_SPUR_DELTA_PHASE));
+	REG_WRITE(ah, AR_PHY_TIMING11, new);
+
+	ar5008_hw_cmn_spur_mitigate(ah, chan, bin);
+}
+
+/**
  * ar5008_hw_rf_alloc_ext_banks - allocates banks for external radio programming
  * @ah: atheros hardware structure
  *
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_phy.c b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
index fc08162b5820..db6624527d99 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
@@ -169,29 +169,17 @@ static void ar9002_hw_spur_mitigate(struct ath_hw *ah,
 {
 	int bb_spur = AR_NO_SPUR;
 	int freq;
-	int bin, cur_bin;
+	int bin;
 	int bb_spur_off, spur_subchannel_sd;
 	int spur_freq_sd;
 	int spur_delta_phase;
 	int denominator;
-	int upper, lower, cur_vit_mask;
 	int tmp, newVal;
 	int i;
-	static const int pilot_mask_reg[4] = {
-		AR_PHY_TIMING7, AR_PHY_TIMING8,
-		AR_PHY_PILOT_MASK_01_30, AR_PHY_PILOT_MASK_31_60
-	};
-	static const int chan_mask_reg[4] = {
-		AR_PHY_TIMING9, AR_PHY_TIMING10,
-		AR_PHY_CHANNEL_MASK_01_30, AR_PHY_CHANNEL_MASK_31_60
-	};
-	static const int inc[4] = { 0, 100, 0, 0 };
 	struct chan_centers centers;
 
 	int8_t mask_m[123];
 	int8_t mask_p[123];
-	int8_t mask_amt;
-	int tmp_mask;
 	int cur_bb_spur;
 	bool is2GHz = IS_CHAN_2GHZ(chan);
 
@@ -288,135 +276,7 @@ static void ar9002_hw_spur_mitigate(struct ath_hw *ah,
 	newVal = spur_subchannel_sd << AR_PHY_SFCORR_SPUR_SUBCHNL_SD_S;
 	REG_WRITE(ah, AR_PHY_SFCORR_EXT, newVal);
 
-	cur_bin = -6000;
-	upper = bin + 100;
-	lower = bin - 100;
-
-	for (i = 0; i < 4; i++) {
-		int pilot_mask = 0;
-		int chan_mask = 0;
-		int bp = 0;
-		for (bp = 0; bp < 30; bp++) {
-			if ((cur_bin > lower) && (cur_bin < upper)) {
-				pilot_mask = pilot_mask | 0x1 << bp;
-				chan_mask = chan_mask | 0x1 << bp;
-			}
-			cur_bin += 100;
-		}
-		cur_bin += inc[i];
-		REG_WRITE(ah, pilot_mask_reg[i], pilot_mask);
-		REG_WRITE(ah, chan_mask_reg[i], chan_mask);
-	}
-
-	cur_vit_mask = 6100;
-	upper = bin + 120;
-	lower = bin - 120;
-
-	for (i = 0; i < 123; i++) {
-		if ((cur_vit_mask > lower) && (cur_vit_mask < upper)) {
-
-			/* workaround for gcc bug #37014 */
-			volatile int tmp_v = abs(cur_vit_mask - bin);
-
-			if (tmp_v < 75)
-				mask_amt = 1;
-			else
-				mask_amt = 0;
-			if (cur_vit_mask < 0)
-				mask_m[abs(cur_vit_mask / 100)] = mask_amt;
-			else
-				mask_p[cur_vit_mask / 100] = mask_amt;
-		}
-		cur_vit_mask -= 100;
-	}
-
-	tmp_mask = (mask_m[46] << 30) | (mask_m[47] << 28)
-		| (mask_m[48] << 26) | (mask_m[49] << 24)
-		| (mask_m[50] << 22) | (mask_m[51] << 20)
-		| (mask_m[52] << 18) | (mask_m[53] << 16)
-		| (mask_m[54] << 14) | (mask_m[55] << 12)
-		| (mask_m[56] << 10) | (mask_m[57] << 8)
-		| (mask_m[58] << 6) | (mask_m[59] << 4)
-		| (mask_m[60] << 2) | (mask_m[61] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK_1, tmp_mask);
-	REG_WRITE(ah, AR_PHY_VIT_MASK2_M_46_61, tmp_mask);
-
-	tmp_mask = (mask_m[31] << 28)
-		| (mask_m[32] << 26) | (mask_m[33] << 24)
-		| (mask_m[34] << 22) | (mask_m[35] << 20)
-		| (mask_m[36] << 18) | (mask_m[37] << 16)
-		| (mask_m[48] << 14) | (mask_m[39] << 12)
-		| (mask_m[40] << 10) | (mask_m[41] << 8)
-		| (mask_m[42] << 6) | (mask_m[43] << 4)
-		| (mask_m[44] << 2) | (mask_m[45] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK_2, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_M_31_45, tmp_mask);
-
-	tmp_mask = (mask_m[16] << 30) | (mask_m[16] << 28)
-		| (mask_m[18] << 26) | (mask_m[18] << 24)
-		| (mask_m[20] << 22) | (mask_m[20] << 20)
-		| (mask_m[22] << 18) | (mask_m[22] << 16)
-		| (mask_m[24] << 14) | (mask_m[24] << 12)
-		| (mask_m[25] << 10) | (mask_m[26] << 8)
-		| (mask_m[27] << 6) | (mask_m[28] << 4)
-		| (mask_m[29] << 2) | (mask_m[30] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK_3, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_M_16_30, tmp_mask);
-
-	tmp_mask = (mask_m[0] << 30) | (mask_m[1] << 28)
-		| (mask_m[2] << 26) | (mask_m[3] << 24)
-		| (mask_m[4] << 22) | (mask_m[5] << 20)
-		| (mask_m[6] << 18) | (mask_m[7] << 16)
-		| (mask_m[8] << 14) | (mask_m[9] << 12)
-		| (mask_m[10] << 10) | (mask_m[11] << 8)
-		| (mask_m[12] << 6) | (mask_m[13] << 4)
-		| (mask_m[14] << 2) | (mask_m[15] << 0);
-	REG_WRITE(ah, AR_PHY_MASK_CTL, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_M_00_15, tmp_mask);
-
-	tmp_mask = (mask_p[15] << 28)
-		| (mask_p[14] << 26) | (mask_p[13] << 24)
-		| (mask_p[12] << 22) | (mask_p[11] << 20)
-		| (mask_p[10] << 18) | (mask_p[9] << 16)
-		| (mask_p[8] << 14) | (mask_p[7] << 12)
-		| (mask_p[6] << 10) | (mask_p[5] << 8)
-		| (mask_p[4] << 6) | (mask_p[3] << 4)
-		| (mask_p[2] << 2) | (mask_p[1] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK2_1, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_P_15_01, tmp_mask);
-
-	tmp_mask = (mask_p[30] << 28)
-		| (mask_p[29] << 26) | (mask_p[28] << 24)
-		| (mask_p[27] << 22) | (mask_p[26] << 20)
-		| (mask_p[25] << 18) | (mask_p[24] << 16)
-		| (mask_p[23] << 14) | (mask_p[22] << 12)
-		| (mask_p[21] << 10) | (mask_p[20] << 8)
-		| (mask_p[19] << 6) | (mask_p[18] << 4)
-		| (mask_p[17] << 2) | (mask_p[16] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK2_2, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_P_30_16, tmp_mask);
-
-	tmp_mask = (mask_p[45] << 28)
-		| (mask_p[44] << 26) | (mask_p[43] << 24)
-		| (mask_p[42] << 22) | (mask_p[41] << 20)
-		| (mask_p[40] << 18) | (mask_p[39] << 16)
-		| (mask_p[38] << 14) | (mask_p[37] << 12)
-		| (mask_p[36] << 10) | (mask_p[35] << 8)
-		| (mask_p[34] << 6) | (mask_p[33] << 4)
-		| (mask_p[32] << 2) | (mask_p[31] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK2_3, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_P_45_31, tmp_mask);
-
-	tmp_mask = (mask_p[61] << 30) | (mask_p[60] << 28)
-		| (mask_p[59] << 26) | (mask_p[58] << 24)
-		| (mask_p[57] << 22) | (mask_p[56] << 20)
-		| (mask_p[55] << 18) | (mask_p[54] << 16)
-		| (mask_p[53] << 14) | (mask_p[52] << 12)
-		| (mask_p[51] << 10) | (mask_p[50] << 8)
-		| (mask_p[49] << 6) | (mask_p[48] << 4)
-		| (mask_p[47] << 2) | (mask_p[46] << 0);
-	REG_WRITE(ah, AR_PHY_BIN_MASK2_4, tmp_mask);
-	REG_WRITE(ah, AR_PHY_MASK2_P_61_45, tmp_mask);
+	ar5008_hw_cmn_spur_mitigate(ah, chan, bin);
 
 	REGWRITE_BUFFER_FLUSH(ah);
 }
diff --git a/drivers/net/wireless/ath/ath9k/common-spectral.c b/drivers/net/wireless/ath/ath9k/common-spectral.c
index 5cee231cca1f..a8762711ad74 100644
--- a/drivers/net/wireless/ath/ath9k/common-spectral.c
+++ b/drivers/net/wireless/ath/ath9k/common-spectral.c
@@ -15,6 +15,7 @@
  */
 
 #include <linux/relay.h>
+#include <linux/random.h>
 #include "ath9k.h"
 
 static s8 fix_rssi_inv_only(u8 rssi_val)
@@ -36,21 +37,480 @@ static void ath_debug_send_fft_sample(struct ath_spec_scan_priv *spec_priv,
 	relay_write(spec_priv->rfs_chan_spec_scan, fft_sample_tlv, length);
 }
 
+typedef int (ath_cmn_fft_idx_validator) (u8 *sample_end, int bytes_read);
+
+static int
+ath_cmn_max_idx_verify_ht20_fft(u8 *sample_end, int bytes_read)
+{
+	struct ath_ht20_mag_info *mag_info;
+	u8 *sample;
+	u16 max_magnitude;
+	u8 max_index;
+	u8 max_exp;
+
+	/* Sanity check so that we don't read outside the read
+	 * buffer
+	 */
+	if (bytes_read < SPECTRAL_HT20_SAMPLE_LEN - 1)
+		return -1;
+
+	mag_info = (struct ath_ht20_mag_info *) (sample_end -
+				sizeof(struct ath_ht20_mag_info) + 1);
+
+	sample = sample_end - SPECTRAL_HT20_SAMPLE_LEN + 1;
+
+	max_index = spectral_max_index(mag_info->all_bins,
+				       SPECTRAL_HT20_NUM_BINS);
+	max_magnitude = spectral_max_magnitude(mag_info->all_bins);
+
+	max_exp = mag_info->max_exp & 0xf;
+
+	/* Don't try to read something outside the read buffer
+	 * in case of a missing byte (so bins[0] will be outside
+	 * the read buffer)
+	 */
+	if (bytes_read < SPECTRAL_HT20_SAMPLE_LEN && max_index < 1)
+		return -1;
+
+	if (sample[max_index] != (max_magnitude >> max_exp))
+		return -1;
+	else
+		return 0;
+}
+
+static int
+ath_cmn_max_idx_verify_ht20_40_fft(u8 *sample_end, int bytes_read)
+{
+	struct ath_ht20_40_mag_info *mag_info;
+	u8 *sample;
+	u16 lower_mag, upper_mag;
+	u8 lower_max_index, upper_max_index;
+	u8 max_exp;
+	int dc_pos = SPECTRAL_HT20_40_NUM_BINS / 2;
+
+	/* Sanity check so that we don't read outside the read
+	 * buffer
+	 */
+	if (bytes_read < SPECTRAL_HT20_40_SAMPLE_LEN - 1)
+		return -1;
+
+	mag_info = (struct ath_ht20_40_mag_info *) (sample_end -
+				sizeof(struct ath_ht20_40_mag_info) + 1);
+
+	sample = sample_end - SPECTRAL_HT20_40_SAMPLE_LEN + 1;
+
+	lower_mag = spectral_max_magnitude(mag_info->lower_bins);
+	lower_max_index = spectral_max_index(mag_info->lower_bins,
+					     SPECTRAL_HT20_40_NUM_BINS);
+
+	upper_mag = spectral_max_magnitude(mag_info->upper_bins);
+	upper_max_index = spectral_max_index(mag_info->upper_bins,
+					     SPECTRAL_HT20_40_NUM_BINS);
+
+	max_exp = mag_info->max_exp & 0xf;
+
+	/* Don't try to read something outside the read buffer
+	 * in case of a missing byte (so bins[0] will be outside
+	 * the read buffer)
+	 */
+	if (bytes_read < SPECTRAL_HT20_40_SAMPLE_LEN &&
+	   ((upper_max_index < 1) || (lower_max_index < 1)))
+		return -1;
+
+	/* Some time hardware messes up the index and adds
+	 * the index of the middle point (dc_pos). Try to fix it.
+	 */
+	if ((upper_max_index - dc_pos > 0) &&
+	   (sample[upper_max_index] == (upper_mag >> max_exp)))
+		upper_max_index -= dc_pos;
+
+	if ((lower_max_index - dc_pos > 0) &&
+	   (sample[lower_max_index - dc_pos] == (lower_mag >> max_exp)))
+		lower_max_index -= dc_pos;
+
+	if ((sample[upper_max_index + dc_pos] != (upper_mag >> max_exp)) ||
+	   (sample[lower_max_index] != (lower_mag >> max_exp)))
+		return -1;
+	else
+		return 0;
+}
+
+typedef int (ath_cmn_fft_sample_handler) (struct ath_rx_status *rs,
+			struct ath_spec_scan_priv *spec_priv,
+			u8 *sample_buf, u64 tsf, u16 freq, int chan_type);
+
+static int
+ath_cmn_process_ht20_fft(struct ath_rx_status *rs,
+			struct ath_spec_scan_priv *spec_priv,
+			u8 *sample_buf,
+			u64 tsf, u16 freq, int chan_type)
+{
+	struct fft_sample_ht20 fft_sample_20;
+	struct ath_common *common = ath9k_hw_common(spec_priv->ah);
+	struct ath_hw *ah = spec_priv->ah;
+	struct ath_ht20_mag_info *mag_info;
+	struct fft_sample_tlv *tlv;
+	int i = 0;
+	int ret = 0;
+	int dc_pos = SPECTRAL_HT20_NUM_BINS / 2;
+	u16 magnitude, tmp_mag, length;
+	u8 max_index, bitmap_w, max_exp;
+
+	length = sizeof(fft_sample_20) - sizeof(struct fft_sample_tlv);
+	fft_sample_20.tlv.type = ATH_FFT_SAMPLE_HT20;
+	fft_sample_20.tlv.length = __cpu_to_be16(length);
+	fft_sample_20.freq = __cpu_to_be16(freq);
+	fft_sample_20.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
+	fft_sample_20.noise = ah->noise;
+
+	mag_info = (struct ath_ht20_mag_info *) (sample_buf +
+					SPECTRAL_HT20_NUM_BINS);
+
+	magnitude = spectral_max_magnitude(mag_info->all_bins);
+	fft_sample_20.max_magnitude = __cpu_to_be16(magnitude);
+
+	max_index = spectral_max_index(mag_info->all_bins,
+					SPECTRAL_HT20_NUM_BINS);
+	fft_sample_20.max_index = max_index;
+
+	bitmap_w = spectral_bitmap_weight(mag_info->all_bins);
+	fft_sample_20.bitmap_weight = bitmap_w;
+
+	max_exp = mag_info->max_exp & 0xf;
+	fft_sample_20.max_exp = max_exp;
+
+	fft_sample_20.tsf = __cpu_to_be64(tsf);
+
+	memcpy(fft_sample_20.data, sample_buf, SPECTRAL_HT20_NUM_BINS);
+
+	ath_dbg(common, SPECTRAL_SCAN, "FFT HT20 frame: max mag 0x%X,"
+					"max_mag_idx %i\n",
+					magnitude >> max_exp,
+					max_index);
+
+	if (fft_sample_20.data[max_index] != (magnitude >> max_exp)) {
+		ath_dbg(common, SPECTRAL_SCAN, "Magnitude mismatch !\n");
+		ret = -1;
+	}
+
+	/* DC value (value in the middle) is the blind spot of the spectral
+	 * sample and invalid, interpolate it.
+	 */
+	fft_sample_20.data[dc_pos] = (fft_sample_20.data[dc_pos + 1] +
+					fft_sample_20.data[dc_pos - 1]) / 2;
+
+	/* Check if the maximum magnitude is indeed maximum,
+	 * also if the maximum value was at dc_pos, calculate
+	 * a new one (since value at dc_pos is invalid).
+	 */
+	if (max_index == dc_pos) {
+		tmp_mag = 0;
+		for (i = 0; i < dc_pos; i++) {
+			if (fft_sample_20.data[i] > tmp_mag) {
+				tmp_mag = fft_sample_20.data[i];
+				fft_sample_20.max_index = i;
+			}
+		}
+
+		magnitude = tmp_mag << max_exp;
+		fft_sample_20.max_magnitude = __cpu_to_be16(magnitude);
+
+		ath_dbg(common, SPECTRAL_SCAN,
+			"Calculated new lower max 0x%X at %i\n",
+			tmp_mag, fft_sample_20.max_index);
+	} else
+	for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) {
+		if (fft_sample_20.data[i] == (magnitude >> max_exp))
+			ath_dbg(common, SPECTRAL_SCAN,
+				"Got max: 0x%X at index %i\n",
+				fft_sample_20.data[i], i);
+
+		if (fft_sample_20.data[i] > (magnitude >> max_exp)) {
+			ath_dbg(common, SPECTRAL_SCAN,
+				"Got bin %i greater than max: 0x%X\n",
+				i, fft_sample_20.data[i]);
+			ret = -1;
+		}
+	}
+
+	if (ret < 0)
+		return ret;
+
+	tlv = (struct fft_sample_tlv *)&fft_sample_20;
+
+	ath_debug_send_fft_sample(spec_priv, tlv);
+
+	return 0;
+}
+
+static int
+ath_cmn_process_ht20_40_fft(struct ath_rx_status *rs,
+			struct ath_spec_scan_priv *spec_priv,
+			u8 *sample_buf,
+			u64 tsf, u16 freq, int chan_type)
+{
+	struct fft_sample_ht20_40 fft_sample_40;
+	struct ath_common *common = ath9k_hw_common(spec_priv->ah);
+	struct ath_hw *ah = spec_priv->ah;
+	struct ath9k_hw_cal_data *caldata = ah->caldata;
+	struct ath_ht20_40_mag_info *mag_info;
+	struct fft_sample_tlv *tlv;
+	int dc_pos = SPECTRAL_HT20_40_NUM_BINS / 2;
+	int i = 0;
+	int ret = 0;
+	s16 ext_nf;
+	u16 lower_mag, upper_mag, tmp_mag, length;
+	s8 lower_rssi, upper_rssi;
+	u8 lower_max_index, upper_max_index;
+	u8 lower_bitmap_w, upper_bitmap_w, max_exp;
+
+	if (caldata)
+		ext_nf = ath9k_hw_getchan_noise(ah, ah->curchan,
+				caldata->nfCalHist[3].privNF);
+	else
+		ext_nf = ATH_DEFAULT_NOISE_FLOOR;
+
+	length = sizeof(fft_sample_40) - sizeof(struct fft_sample_tlv);
+	fft_sample_40.tlv.type = ATH_FFT_SAMPLE_HT20_40;
+	fft_sample_40.tlv.length = __cpu_to_be16(length);
+	fft_sample_40.freq = __cpu_to_be16(freq);
+	fft_sample_40.channel_type = chan_type;
+
+	if (chan_type == NL80211_CHAN_HT40PLUS) {
+		lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
+		upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]);
+
+		fft_sample_40.lower_noise = ah->noise;
+		fft_sample_40.upper_noise = ext_nf;
+	} else {
+		lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]);
+		upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
+
+		fft_sample_40.lower_noise = ext_nf;
+		fft_sample_40.upper_noise = ah->noise;
+	}
+
+	fft_sample_40.lower_rssi = lower_rssi;
+	fft_sample_40.upper_rssi = upper_rssi;
+
+	mag_info = (struct ath_ht20_40_mag_info *) (sample_buf +
+					SPECTRAL_HT20_40_NUM_BINS);
+
+	lower_mag = spectral_max_magnitude(mag_info->lower_bins);
+	fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag);
+
+	upper_mag = spectral_max_magnitude(mag_info->upper_bins);
+	fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag);
+
+	lower_max_index = spectral_max_index(mag_info->lower_bins,
+					SPECTRAL_HT20_40_NUM_BINS);
+	fft_sample_40.lower_max_index = lower_max_index;
+
+	upper_max_index = spectral_max_index(mag_info->upper_bins,
+					SPECTRAL_HT20_40_NUM_BINS);
+	fft_sample_40.upper_max_index = upper_max_index;
+
+	lower_bitmap_w = spectral_bitmap_weight(mag_info->lower_bins);
+	fft_sample_40.lower_bitmap_weight = lower_bitmap_w;
+
+	upper_bitmap_w = spectral_bitmap_weight(mag_info->upper_bins);
+	fft_sample_40.upper_bitmap_weight = upper_bitmap_w;
+
+	max_exp = mag_info->max_exp & 0xf;
+	fft_sample_40.max_exp = max_exp;
+
+	fft_sample_40.tsf = __cpu_to_be64(tsf);
+
+	memcpy(fft_sample_40.data, sample_buf, SPECTRAL_HT20_40_NUM_BINS);
+
+	ath_dbg(common, SPECTRAL_SCAN, "FFT HT20/40 frame: lower mag 0x%X,"
+					"lower_mag_idx %i, upper mag 0x%X,"
+					"upper_mag_idx %i\n",
+					lower_mag >> max_exp,
+					lower_max_index,
+					upper_mag >> max_exp,
+					upper_max_index);
+
+	/* Some time hardware messes up the index and adds
+	 * the index of the middle point (dc_pos). Try to fix it.
+	 */
+	if ((upper_max_index - dc_pos > 0) &&
+	   (fft_sample_40.data[upper_max_index] == (upper_mag >> max_exp))) {
+		upper_max_index -= dc_pos;
+		fft_sample_40.upper_max_index = upper_max_index;
+	}
+
+	if ((lower_max_index - dc_pos > 0) &&
+	   (fft_sample_40.data[lower_max_index - dc_pos] ==
+	   (lower_mag >> max_exp))) {
+		lower_max_index -= dc_pos;
+		fft_sample_40.lower_max_index = lower_max_index;
+	}
+
+	/* Check if we got the expected magnitude values at
+	 * the expected bins
+	 */
+	if ((fft_sample_40.data[upper_max_index + dc_pos]
+	    != (upper_mag >> max_exp)) ||
+	   (fft_sample_40.data[lower_max_index]
+	    != (lower_mag >> max_exp))) {
+		ath_dbg(common, SPECTRAL_SCAN, "Magnitude mismatch !\n");
+		ret = -1;
+	}
+
+	/* DC value (value in the middle) is the blind spot of the spectral
+	 * sample and invalid, interpolate it.
+	 */
+	fft_sample_40.data[dc_pos] = (fft_sample_40.data[dc_pos + 1] +
+					fft_sample_40.data[dc_pos - 1]) / 2;
+
+	/* Check if the maximum magnitudes are indeed maximum,
+	 * also if the maximum value was at dc_pos, calculate
+	 * a new one (since value at dc_pos is invalid).
+	 */
+	if (lower_max_index == dc_pos) {
+		tmp_mag = 0;
+		for (i = 0; i < dc_pos; i++) {
+			if (fft_sample_40.data[i] > tmp_mag) {
+				tmp_mag = fft_sample_40.data[i];
+				fft_sample_40.lower_max_index = i;
+			}
+		}
+
+		lower_mag = tmp_mag << max_exp;
+		fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag);
+
+		ath_dbg(common, SPECTRAL_SCAN,
+			"Calculated new lower max 0x%X at %i\n",
+			tmp_mag, fft_sample_40.lower_max_index);
+	} else
+	for (i = 0; i < dc_pos; i++) {
+		if (fft_sample_40.data[i] == (lower_mag >> max_exp))
+			ath_dbg(common, SPECTRAL_SCAN,
+				"Got lower mag: 0x%X at index %i\n",
+				fft_sample_40.data[i], i);
+
+		if (fft_sample_40.data[i] > (lower_mag >> max_exp)) {
+			ath_dbg(common, SPECTRAL_SCAN,
+				"Got lower bin %i higher than max: 0x%X\n",
+				i, fft_sample_40.data[i]);
+			ret = -1;
+		}
+	}
+
+	if (upper_max_index == dc_pos) {
+		tmp_mag = 0;
+		for (i = dc_pos; i < SPECTRAL_HT20_40_NUM_BINS; i++) {
+			if (fft_sample_40.data[i] > tmp_mag) {
+				tmp_mag = fft_sample_40.data[i];
+				fft_sample_40.upper_max_index = i;
+			}
+		}
+		upper_mag = tmp_mag << max_exp;
+		fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag);
+
+		ath_dbg(common, SPECTRAL_SCAN,
+			"Calculated new upper max 0x%X at %i\n",
+			tmp_mag, i);
+	} else
+	for (i = dc_pos; i < SPECTRAL_HT20_40_NUM_BINS; i++) {
+		if (fft_sample_40.data[i] == (upper_mag >> max_exp))
+			ath_dbg(common, SPECTRAL_SCAN,
+				"Got upper mag: 0x%X at index %i\n",
+				fft_sample_40.data[i], i);
+
+		if (fft_sample_40.data[i] > (upper_mag >> max_exp)) {
+			ath_dbg(common, SPECTRAL_SCAN,
+				"Got upper bin %i higher than max: 0x%X\n",
+				i, fft_sample_40.data[i]);
+
+			ret = -1;
+		}
+	}
+
+	if (ret < 0)
+		return ret;
+
+	tlv = (struct fft_sample_tlv *)&fft_sample_40;
+
+	ath_debug_send_fft_sample(spec_priv, tlv);
+
+	return 0;
+}
+
+static inline void
+ath_cmn_copy_fft_frame(u8 *in, u8 *out, int sample_len, int sample_bytes)
+{
+	switch (sample_bytes - sample_len) {
+	case -1:
+		/* First byte missing */
+		memcpy(&out[1], in,
+		       sample_len - 1);
+		break;
+	case 0:
+		/* Length correct, nothing to do. */
+		memcpy(out, in, sample_len);
+		break;
+	case 1:
+		/* MAC added 2 extra bytes AND first byte
+		 * is missing.
+		 */
+		memcpy(&out[1], in, 30);
+		out[31] = in[31];
+		memcpy(&out[32], &in[33],
+		       sample_len - 32);
+		break;
+	case 2:
+		/* MAC added 2 extra bytes at bin 30 and 32,
+		 * remove them.
+		 */
+		memcpy(out, in, 30);
+		out[30] = in[31];
+		memcpy(&out[31], &in[33],
+		       sample_len - 31);
+		break;
+	default:
+		break;
+	}
+}
+
+static int
+ath_cmn_is_fft_buf_full(struct ath_spec_scan_priv *spec_priv)
+{
+	int i = 0;
+	int ret = 0;
+	struct rchan *rc = spec_priv->rfs_chan_spec_scan;
+
+	for_each_online_cpu(i)
+		ret += relay_buf_full(rc->buf[i]);
+
+	i = num_online_cpus();
+
+	if (ret == i)
+		return 1;
+	else
+		return 0;
+}
+
 /* returns 1 if this was a spectral frame, even if not handled. */
 int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr,
 		    struct ath_rx_status *rs, u64 tsf)
 {
+	u8 sample_buf[SPECTRAL_SAMPLE_MAX_LEN] = {0};
 	struct ath_hw *ah = spec_priv->ah;
 	struct ath_common *common = ath9k_hw_common(spec_priv->ah);
-	u8 num_bins, *bins, *vdata = (u8 *)hdr;
-	struct fft_sample_ht20 fft_sample_20;
-	struct fft_sample_ht20_40 fft_sample_40;
-	struct fft_sample_tlv *tlv;
+	u8 num_bins, *vdata = (u8 *)hdr;
 	struct ath_radar_info *radar_info;
 	int len = rs->rs_datalen;
-	int dc_pos;
-	u16 fft_len, length, freq = ah->curchan->chan->center_freq;
+	int i;
+	int got_slen = 0;
+	u8  *sample_start;
+	int sample_bytes = 0;
+	int ret = 0;
+	u16 fft_len, sample_len, freq = ah->curchan->chan->center_freq;
 	enum nl80211_channel_type chan_type;
+	ath_cmn_fft_idx_validator *fft_idx_validator;
+	ath_cmn_fft_sample_handler *fft_handler;
 
 	/* AR9280 and before report via ATH9K_PHYERR_RADAR, AR93xx and newer
 	 * via ATH9K_PHYERR_SPECTRAL. Haven't seen ATH9K_PHYERR_FALSE_RADAR_EXT
@@ -68,140 +528,170 @@ int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_h
 	if (!(radar_info->pulse_bw_info & SPECTRAL_SCAN_BITMASK))
 		return 0;
 
+	/* Output buffers are full, no need to process anything
+	 * since there is no space to put the result anyway
+	 */
+	ret = ath_cmn_is_fft_buf_full(spec_priv);
+	if (ret == 1) {
+		ath_dbg(common, SPECTRAL_SCAN, "FFT report ignored, no space "
+						"left on output buffers\n");
+		return 1;
+	}
+
 	chan_type = cfg80211_get_chandef_type(&common->hw->conf.chandef);
 	if ((chan_type == NL80211_CHAN_HT40MINUS) ||
 	    (chan_type == NL80211_CHAN_HT40PLUS)) {
 		fft_len = SPECTRAL_HT20_40_TOTAL_DATA_LEN;
+		sample_len = SPECTRAL_HT20_40_SAMPLE_LEN;
 		num_bins = SPECTRAL_HT20_40_NUM_BINS;
-		bins = (u8 *)fft_sample_40.data;
+		fft_idx_validator = &ath_cmn_max_idx_verify_ht20_40_fft;
+		fft_handler = &ath_cmn_process_ht20_40_fft;
 	} else {
 		fft_len = SPECTRAL_HT20_TOTAL_DATA_LEN;
+		sample_len = SPECTRAL_HT20_SAMPLE_LEN;
 		num_bins = SPECTRAL_HT20_NUM_BINS;
-		bins = (u8 *)fft_sample_20.data;
-	}
-
-	/* Variation in the data length is possible and will be fixed later */
-	if ((len > fft_len + 2) || (len < fft_len - 1))
-		return 1;
-
-	switch (len - fft_len) {
-	case 0:
-		/* length correct, nothing to do. */
-		memcpy(bins, vdata, num_bins);
-		break;
-	case -1:
-		/* first byte missing, duplicate it. */
-		memcpy(&bins[1], vdata, num_bins - 1);
-		bins[0] = vdata[0];
-		break;
-	case 2:
-		/* MAC added 2 extra bytes at bin 30 and 32, remove them. */
-		memcpy(bins, vdata, 30);
-		bins[30] = vdata[31];
-		memcpy(&bins[31], &vdata[33], num_bins - 31);
-		break;
-	case 1:
-		/* MAC added 2 extra bytes AND first byte is missing. */
-		bins[0] = vdata[0];
-		memcpy(&bins[1], vdata, 30);
-		bins[31] = vdata[31];
-		memcpy(&bins[32], &vdata[33], num_bins - 32);
-		break;
-	default:
-		return 1;
+		fft_idx_validator = ath_cmn_max_idx_verify_ht20_fft;
+		fft_handler = &ath_cmn_process_ht20_fft;
 	}
 
-	/* DC value (value in the middle) is the blind spot of the spectral
-	 * sample and invalid, interpolate it.
-	 */
-	dc_pos = num_bins / 2;
-	bins[dc_pos] = (bins[dc_pos + 1] + bins[dc_pos - 1]) / 2;
-
-	if ((chan_type == NL80211_CHAN_HT40MINUS) ||
-	    (chan_type == NL80211_CHAN_HT40PLUS)) {
-		s8 lower_rssi, upper_rssi;
-		s16 ext_nf;
-		u8 lower_max_index, upper_max_index;
-		u8 lower_bitmap_w, upper_bitmap_w;
-		u16 lower_mag, upper_mag;
-		struct ath9k_hw_cal_data *caldata = ah->caldata;
-		struct ath_ht20_40_mag_info *mag_info;
-
-		if (caldata)
-			ext_nf = ath9k_hw_getchan_noise(ah, ah->curchan,
-					caldata->nfCalHist[3].privNF);
-		else
-			ext_nf = ATH_DEFAULT_NOISE_FLOOR;
-
-		length = sizeof(fft_sample_40) - sizeof(struct fft_sample_tlv);
-		fft_sample_40.tlv.type = ATH_FFT_SAMPLE_HT20_40;
-		fft_sample_40.tlv.length = __cpu_to_be16(length);
-		fft_sample_40.freq = __cpu_to_be16(freq);
-		fft_sample_40.channel_type = chan_type;
-
-		if (chan_type == NL80211_CHAN_HT40PLUS) {
-			lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
-			upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]);
-
-			fft_sample_40.lower_noise = ah->noise;
-			fft_sample_40.upper_noise = ext_nf;
-		} else {
-			lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]);
-			upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
-
-			fft_sample_40.lower_noise = ext_nf;
-			fft_sample_40.upper_noise = ah->noise;
+	ath_dbg(common, SPECTRAL_SCAN, "Got radar dump bw_info: 0x%X,"
+					"len: %i fft_len: %i\n",
+					radar_info->pulse_bw_info,
+					len,
+					fft_len);
+	sample_start = vdata;
+	for (i = 0; i < len - 2; i++) {
+		sample_bytes++;
+
+		/* Only a single sample received, no need to look
+		 * for the sample's end, do the correction based
+		 * on the packet's length instead. Note that hw
+		 * will always put the radar_info structure on
+		 * the end.
+		 */
+		if (len <= fft_len + 2) {
+			sample_bytes = len - sizeof(struct ath_radar_info);
+			got_slen = 1;
 		}
-		fft_sample_40.lower_rssi = lower_rssi;
-		fft_sample_40.upper_rssi = upper_rssi;
-
-		mag_info = ((struct ath_ht20_40_mag_info *)radar_info) - 1;
-		lower_mag = spectral_max_magnitude(mag_info->lower_bins);
-		upper_mag = spectral_max_magnitude(mag_info->upper_bins);
-		fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag);
-		fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag);
-		lower_max_index = spectral_max_index(mag_info->lower_bins);
-		upper_max_index = spectral_max_index(mag_info->upper_bins);
-		fft_sample_40.lower_max_index = lower_max_index;
-		fft_sample_40.upper_max_index = upper_max_index;
-		lower_bitmap_w = spectral_bitmap_weight(mag_info->lower_bins);
-		upper_bitmap_w = spectral_bitmap_weight(mag_info->upper_bins);
-		fft_sample_40.lower_bitmap_weight = lower_bitmap_w;
-		fft_sample_40.upper_bitmap_weight = upper_bitmap_w;
-		fft_sample_40.max_exp = mag_info->max_exp & 0xf;
 
-		fft_sample_40.tsf = __cpu_to_be64(tsf);
-
-		tlv = (struct fft_sample_tlv *)&fft_sample_40;
-	} else {
-		u8 max_index, bitmap_w;
-		u16 magnitude;
-		struct ath_ht20_mag_info *mag_info;
-
-		length = sizeof(fft_sample_20) - sizeof(struct fft_sample_tlv);
-		fft_sample_20.tlv.type = ATH_FFT_SAMPLE_HT20;
-		fft_sample_20.tlv.length = __cpu_to_be16(length);
-		fft_sample_20.freq = __cpu_to_be16(freq);
-
-		fft_sample_20.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
-		fft_sample_20.noise = ah->noise;
-
-		mag_info = ((struct ath_ht20_mag_info *)radar_info) - 1;
-		magnitude = spectral_max_magnitude(mag_info->all_bins);
-		fft_sample_20.max_magnitude = __cpu_to_be16(magnitude);
-		max_index = spectral_max_index(mag_info->all_bins);
-		fft_sample_20.max_index = max_index;
-		bitmap_w = spectral_bitmap_weight(mag_info->all_bins);
-		fft_sample_20.bitmap_weight = bitmap_w;
-		fft_sample_20.max_exp = mag_info->max_exp & 0xf;
-
-		fft_sample_20.tsf = __cpu_to_be64(tsf);
+		/* Search for the end of the FFT frame between
+		 * sample_len - 1 and sample_len + 2. exp_max is 3
+		 * bits long and it's the only value on the last
+		 * byte of the frame so since it'll be smaller than
+		 * the next byte (the first bin of the next sample)
+		 * 90% of the time, we can use it as a separator.
+		 */
+		if (vdata[i] <= 0x7 && sample_bytes >= sample_len - 1) {
+
+			/* Got a frame length within boundaries, there are
+			 * four scenarios here:
+			 *
+			 * a) sample_len -> We got the correct length
+			 * b) sample_len + 2 -> 2 bytes added around bin[31]
+			 * c) sample_len - 1 -> The first byte is missing
+			 * d) sample_len + 1 -> b + c at the same time
+			 *
+			 * When MAC adds 2 extra bytes, bin[31] and bin[32]
+			 * have the same value, so we can use that for further
+			 * verification in cases b and d.
+			 */
+
+			/* Did we go too far ? If so we couldn't determine
+			 * this sample's boundaries, discard any further
+			 * data
+			 */
+			if ((sample_bytes > sample_len + 2) ||
+			   ((sample_bytes > sample_len) &&
+			   (sample_start[31] != sample_start[32])))
+				break;
+
+			/* See if we got a valid frame by checking the
+			 * consistency of mag_info fields. This is to
+			 * prevent from "fixing" a correct frame.
+			 * Failure is non-fatal, later frames may
+			 * be valid.
+			 */
+			if (!fft_idx_validator(&vdata[i], i)) {
+				ath_dbg(common, SPECTRAL_SCAN,
+					"Found valid fft frame at %i\n", i);
+				got_slen = 1;
+			}
+
+			/* We expect 1 - 2 more bytes */
+			else if ((sample_start[31] == sample_start[32]) &&
+				(sample_bytes >= sample_len) &&
+				(sample_bytes < sample_len + 2) &&
+				(vdata[i + 1] <= 0x7))
+				continue;
+
+			/* Try to distinguish cases a and c */
+			else if ((sample_bytes == sample_len - 1) &&
+				(vdata[i + 1] <= 0x7))
+				continue;
+
+			got_slen = 1;
+		}
 
-		tlv = (struct fft_sample_tlv *)&fft_sample_20;
+		if (got_slen) {
+			ath_dbg(common, SPECTRAL_SCAN, "FFT frame len: %i\n",
+				sample_bytes);
+
+			/* Only try to fix a frame if it's the only one
+			 * on the report, else just skip it.
+			 */
+			if (sample_bytes != sample_len && len <= fft_len + 2) {
+				ath_cmn_copy_fft_frame(sample_start,
+						       sample_buf, sample_len,
+						       sample_bytes);
+
+				fft_handler(rs, spec_priv, sample_buf,
+					    tsf, freq, chan_type);
+
+				memset(sample_buf, 0, SPECTRAL_SAMPLE_MAX_LEN);
+
+				/* Mix the received bins to the /dev/random
+				 * pool
+				 */
+				add_device_randomness(sample_buf, num_bins);
+			}
+
+			/* Process a normal frame */
+			if (sample_bytes == sample_len) {
+				ret = fft_handler(rs, spec_priv, sample_start,
+						  tsf, freq, chan_type);
+
+				/* Mix the received bins to the /dev/random
+				 * pool
+				 */
+				add_device_randomness(sample_start, num_bins);
+			}
+
+			/* Short report processed, break out of the
+			 * loop.
+			 */
+			if (len <= fft_len + 2)
+				break;
+
+			sample_start = &vdata[i + 1];
+
+			/* -1 to grab sample_len -1, -2 since
+			 * they 'll get increased by one. In case
+			 * of failure try to recover by going byte
+			 * by byte instead.
+			 */
+			if (ret == 0) {
+				i += num_bins - 2;
+				sample_bytes = num_bins - 2;
+			}
+			got_slen = 0;
+		}
 	}
 
-	ath_debug_send_fft_sample(spec_priv, tlv);
-
+	i -= num_bins - 2;
+	if (len - i != sizeof(struct ath_radar_info))
+		ath_dbg(common, SPECTRAL_SCAN, "FFT report truncated"
+						"(bytes left: %i)\n",
+						len - i);
 	return 1;
 }
 EXPORT_SYMBOL(ath_cmn_process_fft);
diff --git a/drivers/net/wireless/ath/ath9k/common-spectral.h b/drivers/net/wireless/ath/ath9k/common-spectral.h
index 82d9dd29652c..998743be9c67 100644
--- a/drivers/net/wireless/ath/ath9k/common-spectral.h
+++ b/drivers/net/wireless/ath/ath9k/common-spectral.h
@@ -66,6 +66,8 @@ struct ath_ht20_fft_packet {
 } __packed;
 
 #define SPECTRAL_HT20_TOTAL_DATA_LEN	(sizeof(struct ath_ht20_fft_packet))
+#define	SPECTRAL_HT20_SAMPLE_LEN	(sizeof(struct ath_ht20_mag_info) +\
+					SPECTRAL_HT20_NUM_BINS)
 
 /* Dynamic 20/40 mode:
  *
@@ -101,6 +103,10 @@ struct ath_spec_scan_priv {
 };
 
 #define SPECTRAL_HT20_40_TOTAL_DATA_LEN	(sizeof(struct ath_ht20_40_fft_packet))
+#define	SPECTRAL_HT20_40_SAMPLE_LEN	(sizeof(struct ath_ht20_40_mag_info) +\
+					SPECTRAL_HT20_40_NUM_BINS)
+
+#define	SPECTRAL_SAMPLE_MAX_LEN		SPECTRAL_HT20_40_SAMPLE_LEN
 
 /* grabs the max magnitude from the all/upper/lower bins */
 static inline u16 spectral_max_magnitude(u8 *bins)
@@ -111,17 +117,32 @@ static inline u16 spectral_max_magnitude(u8 *bins)
 }
 
 /* return the max magnitude from the all/upper/lower bins */
-static inline u8 spectral_max_index(u8 *bins)
+static inline u8 spectral_max_index(u8 *bins, int num_bins)
 {
 	s8 m = (bins[2] & 0xfc) >> 2;
-
-	/* TODO: this still doesn't always report the right values ... */
-	if (m > 32)
+	u8 zero_idx = num_bins / 2;
+
+	/* It's a 5 bit signed int, remove its sign and use one's
+	 * complement interpretation to add the sign back to the 8
+	 * bit int
+	 */
+	if (m & 0x20) {
+		m &= ~0x20;
 		m |= 0xe0;
-	else
-		m &= ~0xe0;
+	}
+
+	/* Bring the zero point to the beginning
+	 * instead of the middle so that we can use
+	 * it for array lookup and that we don't deal
+	 * with negative values later
+	 */
+	m += zero_idx;
+
+	/* Sanity check to make sure index is within bounds */
+	if (m < 0 || m > num_bins - 1)
+		m = 0;
 
-	return m + 29;
+	return m;
 }
 
 /* return the bitmap weight from the all/upper/lower bins */
diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index e82a0d4ce23f..16dff4b89a86 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -440,9 +440,9 @@ static inline void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
 }
 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
 
-#define OP_BT_PRIORITY_DETECTED    BIT(3)
-#define OP_BT_SCAN                 BIT(4)
-#define OP_TSF_RESET               BIT(6)
+#define OP_BT_PRIORITY_DETECTED    3
+#define OP_BT_SCAN                 4
+#define OP_TSF_RESET               6
 
 enum htc_op_flags {
 	HTC_FWFLAG_NO_RMW,
@@ -531,6 +531,7 @@ struct ath9k_htc_priv {
 	struct ath9k_debug debug;
 #endif
 	struct mutex mutex;
+	struct ieee80211_vif *csa_vif;
 };
 
 static inline void ath_read_cachesize(struct ath_common *common, int *csz)
@@ -584,6 +585,7 @@ void ath9k_htc_tx_drain(struct ath9k_htc_priv *priv);
 void ath9k_htc_txstatus(struct ath9k_htc_priv *priv, void *wmi_event);
 void ath9k_tx_failed_tasklet(unsigned long data);
 void ath9k_htc_tx_cleanup_timer(unsigned long data);
+bool ath9k_htc_csa_is_finished(struct ath9k_htc_priv *priv);
 
 int ath9k_rx_init(struct ath9k_htc_priv *priv);
 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv);
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
index e8b6ec3c1dbb..e6bcb4c90fa0 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
@@ -257,6 +257,8 @@ static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
 	}
 
 	spin_unlock_bh(&priv->beacon_lock);
+
+	ath9k_htc_csa_is_finished(priv);
 }
 
 static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
@@ -503,3 +505,20 @@ void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
 		return;
 	}
 }
+
+bool ath9k_htc_csa_is_finished(struct ath9k_htc_priv *priv)
+{
+	struct ieee80211_vif *vif;
+
+	vif = priv->csa_vif;
+	if (!vif || !vif->csa_active)
+		return false;
+
+	if (!ieee80211_csa_is_complete(vif))
+		return false;
+
+	ieee80211_csa_finish(vif);
+
+	priv->csa_vif = NULL;
+	return true;
+}
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index d7beefe60683..39eaf9b6e9b4 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -594,7 +594,7 @@ static void ath9k_init_misc(struct ath9k_htc_priv *priv)
 
 	priv->spec_priv.ah = priv->ah;
 	priv->spec_priv.spec_config.enabled = 0;
-	priv->spec_priv.spec_config.short_repeat = false;
+	priv->spec_priv.spec_config.short_repeat = true;
 	priv->spec_priv.spec_config.count = 8;
 	priv->spec_priv.spec_config.endless = false;
 	priv->spec_priv.spec_config.period = 0x12;
@@ -717,18 +717,18 @@ static void ath9k_set_hw_capab(struct ath9k_htc_priv *priv,
 	struct ath_common *common = ath9k_hw_common(priv->ah);
 	struct base_eep_header *pBase;
 
-	hw->flags = IEEE80211_HW_SIGNAL_DBM |
-		IEEE80211_HW_AMPDU_AGGREGATION |
-		IEEE80211_HW_SPECTRUM_MGMT |
-		IEEE80211_HW_HAS_RATE_CONTROL |
-		IEEE80211_HW_RX_INCLUDES_FCS |
-		IEEE80211_HW_PS_NULLFUNC_STACK |
-		IEEE80211_HW_REPORTS_TX_ACK_STATUS |
-		IEEE80211_HW_MFP_CAPABLE |
-		IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
+	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
+	ieee80211_hw_set(hw, MFP_CAPABLE);
+	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
+	ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
+	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
+	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
+	ieee80211_hw_set(hw, SPECTRUM_MGMT);
+	ieee80211_hw_set(hw, SIGNAL_DBM);
+	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 
 	if (ath9k_ps_enable)
-		hw->flags |= IEEE80211_HW_SUPPORTS_PS;
+		ieee80211_hw_set(hw, SUPPORTS_PS);
 
 	hw->wiphy->interface_modes =
 		BIT(NL80211_IFTYPE_STATION) |
@@ -744,7 +744,8 @@ static void ath9k_set_hw_capab(struct ath9k_htc_priv *priv,
 	hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 
 	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN |
-			    WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
+			    WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
+			    WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 
 	hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 564923c0df87..dab1323dfec7 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -1134,6 +1134,9 @@ static void ath9k_htc_remove_interface(struct ieee80211_hw *hw,
 	priv->nvifs--;
 	priv->vif_slot &= ~(1 << avp->index);
 
+	if (priv->csa_vif == vif)
+		priv->csa_vif = NULL;
+
 	ath9k_htc_remove_station(priv, vif, NULL);
 
 	DEC_VIF(priv, vif->type);
@@ -1238,8 +1241,7 @@ out:
 }
 
 #define SUPPORTED_FILTERS			\
-	(FIF_PROMISC_IN_BSS |			\
-	FIF_ALLMULTI |				\
+	(FIF_ALLMULTI |				\
 	FIF_CONTROL |				\
 	FIF_PSPOLL |				\
 	FIF_OTHER_BSS |				\
@@ -1842,6 +1844,19 @@ static int ath9k_htc_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant,
 	return 0;
 }
 
+static void ath9k_htc_channel_switch_beacon(struct ieee80211_hw *hw,
+					    struct ieee80211_vif *vif,
+					    struct cfg80211_chan_def *chandef)
+{
+	struct ath9k_htc_priv *priv = hw->priv;
+
+	/* mac80211 does not support CSA in multi-if cases (yet) */
+	if (WARN_ON(priv->csa_vif))
+		return;
+
+	priv->csa_vif = vif;
+}
+
 struct ieee80211_ops ath9k_htc_ops = {
 	.tx                 = ath9k_htc_tx,
 	.start              = ath9k_htc_start,
@@ -1868,6 +1883,7 @@ struct ieee80211_ops ath9k_htc_ops = {
 	.set_bitrate_mask   = ath9k_htc_set_bitrate_mask,
 	.get_stats	    = ath9k_htc_get_stats,
 	.get_antenna	    = ath9k_htc_get_antenna,
+	.channel_switch_beacon	= ath9k_htc_channel_switch_beacon,
 
 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
 	.get_et_sset_count  = ath9k_htc_get_et_sset_count,
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
index a0f58e2aa553..cc9648f844ae 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
@@ -872,14 +872,7 @@ u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
 	if (priv->rxfilter & FIF_PROBE_REQ)
 		rfilt |= ATH9K_RX_FILTER_PROBEREQ;
 
-	/*
-	 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
-	 * mode interface or when in monitor mode. AP mode does not need this
-	 * since it receives all in-BSS frames anyway.
-	 */
-	if (((ah->opmode != NL80211_IFTYPE_AP) &&
-	     (priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
-	    ah->is_monitoring)
+	if (ah->is_monitoring)
 		rfilt |= ATH9K_RX_FILTER_PROM;
 
 	if (priv->rxfilter & FIF_CONTROL)
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index c1d2d0340feb..e8454db17634 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -1119,6 +1119,8 @@ bool ar9003_is_paprd_enabled(struct ath_hw *ah);
 void ar9003_hw_set_chain_masks(struct ath_hw *ah, u8 rx, u8 tx);
 void ar9003_hw_init_rate_txpower(struct ath_hw *ah, u8 *rate_array,
 				 struct ath9k_channel *chan);
+void ar5008_hw_cmn_spur_mitigate(struct ath_hw *ah,
+				 struct ath9k_channel *chan, int bin);
 void ar5008_hw_init_rate_txpower(struct ath_hw *ah, int16_t *rate_array,
 				 struct ath9k_channel *chan, int ht40_delta);
 
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index f8d11efa7b0f..eff0e5325e6a 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -796,7 +796,7 @@ static void ath9k_set_mcc_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
 	if (!ath9k_is_chanctx_enabled())
 		return;
 
-	hw->flags |= IEEE80211_HW_QUEUE_CONTROL;
+	ieee80211_hw_set(hw, QUEUE_CONTROL);
 	hw->queues = ATH9K_NUM_TX_QUEUES;
 	hw->offchannel_tx_hw_queue = hw->queues - 1;
 	hw->wiphy->interface_modes &= ~ BIT(NL80211_IFTYPE_WDS);
@@ -818,20 +818,20 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath_common *common = ath9k_hw_common(ah);
 
-	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
-		IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
-		IEEE80211_HW_SIGNAL_DBM |
-		IEEE80211_HW_PS_NULLFUNC_STACK |
-		IEEE80211_HW_SPECTRUM_MGMT |
-		IEEE80211_HW_REPORTS_TX_ACK_STATUS |
-		IEEE80211_HW_SUPPORTS_RC_TABLE |
-		IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
+	ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
+	ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
+	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
+	ieee80211_hw_set(hw, SPECTRUM_MGMT);
+	ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
+	ieee80211_hw_set(hw, SIGNAL_DBM);
+	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
+	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 
 	if (ath9k_ps_enable)
-		hw->flags |= IEEE80211_HW_SUPPORTS_PS;
+		ieee80211_hw_set(hw, SUPPORTS_PS);
 
 	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
-		hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
+		ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 
 		if (AR_SREV_9280_20_OR_LATER(ah))
 			hw->radiotap_mcs_details |=
@@ -839,7 +839,7 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
 	}
 
 	if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || ath9k_modparam_nohwcrypt)
-		hw->flags |= IEEE80211_HW_MFP_CAPABLE;
+		ieee80211_hw_set(hw, MFP_CAPABLE);
 
 	hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
 			       NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index b0badef71ce7..cfd45cb8ccfc 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -216,11 +216,13 @@ static bool ath_prepare_reset(struct ath_softc *sc)
 	ath_stop_ani(sc);
 	ath9k_hw_disable_interrupts(ah);
 
-	if (!ath_drain_all_txq(sc))
-		ret = false;
-
-	if (!ath_stoprecv(sc))
-		ret = false;
+	if (AR_SREV_9300_20_OR_LATER(ah)) {
+		ret &= ath_stoprecv(sc);
+		ret &= ath_drain_all_txq(sc);
+	} else {
+		ret &= ath_drain_all_txq(sc);
+		ret &= ath_stoprecv(sc);
+	}
 
 	return ret;
 }
@@ -1442,8 +1444,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
 }
 
 #define SUPPORTED_FILTERS			\
-	(FIF_PROMISC_IN_BSS |			\
-	FIF_ALLMULTI |				\
+	(FIF_ALLMULTI |				\
 	FIF_CONTROL |				\
 	FIF_PSPOLL |				\
 	FIF_OTHER_BSS |				\
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 6fb40ef86fd6..6c75fb1ab77d 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -392,11 +392,6 @@ u32 ath_calcrxfilter(struct ath_softc *sc)
 	if (sc->cur_chan->rxfilter & FIF_PROBE_REQ)
 		rfilt |= ATH9K_RX_FILTER_PROBEREQ;
 
-	/*
-	 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
-	 * mode interface or when in monitor mode. AP mode does not need this
-	 * since it receives all in-BSS frames anyway.
-	 */
 	if (sc->sc_ah->is_monitoring)
 		rfilt |= ATH9K_RX_FILTER_PROM;