---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -839,6 +839,9 @@ enum mac80211_rx_flags {
- * @signal: signal strength when receiving this frame, either in dBm, in dB or
- * unspecified depending on the hardware capabilities flags
- * @IEEE80211_HW_SIGNAL_*
-+ * @chains: bitmask of receive chains for which separate signal strength
-+ * values were filled.
-+ * @chain_signal: per-chain signal strength, same format as @signal
- * @antenna: antenna used
- * @rate_idx: index of data rate into band's supported rates or MCS index if
- * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT)
-@@ -870,6 +873,8 @@ struct ieee80211_rx_status {
- u8 band;
- u8 antenna;
- s8 signal;
-+ u8 chains;
-+ s8 chain_signal[4];
- u8 ampdu_delimiter_crc;
- u8 vendor_radiotap_align;
- u8 vendor_radiotap_oui[3];
---- a/net/mac80211/sta_info.h
-+++ b/net/mac80211/sta_info.h
-@@ -342,6 +342,11 @@ struct sta_info {
- int last_signal;
- struct ewma avg_signal;
- int last_ack_signal;
-+
-+ u8 chains;
-+ s8 chain_signal_last[4];
-+ struct ewma chain_signal_avg[4];
-+
- /* Plus 1 for non-QoS frames */
- __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
-
---- a/net/mac80211/rx.c
-+++ b/net/mac80211/rx.c
-@@ -1383,6 +1383,7 @@ ieee80211_rx_h_sta_process(struct ieee80
- struct sk_buff *skb = rx->skb;
- struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-+ int i;
-
- if (!sta)
- return RX_CONTINUE;
-@@ -1433,6 +1434,19 @@ ieee80211_rx_h_sta_process(struct ieee80
- ewma_add(&sta->avg_signal, -status->signal);
- }
-
-+ if (status->chains) {
-+ sta->chains = status->chains;
-+ for (i = 0; i < 4; i++) {
-+ int signal = status->chain_signal[i];
-+
-+ if (!(status->chains & BIT(i)))
-+ continue;
-+
-+ sta->chain_signal_last[i] = signal;
-+ ewma_add(&sta->chain_signal_avg[i], -signal);
-+ }
-+ }
-+
- /*
- * Change STA power saving mode only at the end of a frame
- * exchange sequence.
---- a/net/mac80211/sta_info.c
-+++ b/net/mac80211/sta_info.c
-@@ -353,6 +353,8 @@ struct sta_info *sta_info_alloc(struct i
- do_posix_clock_monotonic_gettime(&uptime);
- sta->last_connected = uptime.tv_sec;
- ewma_init(&sta->avg_signal, 1024, 8);
-+ for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
-+ ewma_init(&sta->chain_signal_avg[i], 1024, 8);
-
- if (sta_prepare_rate_control(local, sta, gfp)) {
- kfree(sta);
---- a/include/net/cfg80211.h
-+++ b/include/net/cfg80211.h
-@@ -721,6 +721,8 @@ struct station_parameters {
- * @STATION_INFO_LOCAL_PM: @local_pm filled
- * @STATION_INFO_PEER_PM: @peer_pm filled
- * @STATION_INFO_NONPEER_PM: @nonpeer_pm filled
-+ * @STATION_INFO_CHAIN_SIGNAL: @chain_signal filled
-+ * @STATION_INFO_CHAIN_SIGNAL_AVG: @chain_signal_avg filled
- */
- enum station_info_flags {
- STATION_INFO_INACTIVE_TIME = 1<<0,
-@@ -749,6 +751,8 @@ enum station_info_flags {
- STATION_INFO_NONPEER_PM = 1<<23,
- STATION_INFO_RX_BYTES64 = 1<<24,
- STATION_INFO_TX_BYTES64 = 1<<25,
-+ STATION_INFO_CHAIN_SIGNAL = 1<<26,
-+ STATION_INFO_CHAIN_SIGNAL_AVG = 1<<27,
- };
-
- /**
-@@ -842,6 +846,9 @@ struct sta_bss_parameters {
- * For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
- * @signal_avg: Average signal strength, type depends on the wiphy's signal_type.
- * For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
-+ * @chains: bitmask for filled values in @chain_signal, @chain_signal_avg
-+ * @chain_signal: per-chain signal strength of last received packet in dBm
-+ * @chain_signal_avg: per-chain signal strength average in dBm
- * @txrate: current unicast bitrate from this station
- * @rxrate: current unicast bitrate to this station
- * @rx_packets: packets received from this station
-@@ -877,6 +884,11 @@ struct station_info {
- u8 plink_state;
- s8 signal;
- s8 signal_avg;
-+
-+ u8 chains;
-+ s8 chain_signal[4];
-+ s8 chain_signal_avg[4];
-+
- struct rate_info txrate;
- struct rate_info rxrate;
- u32 rx_packets;
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -133,12 +133,8 @@ struct ath_rx_status {
u8 rs_num_delims;
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
-@@ -937,6 +937,7 @@ static int ath9k_rx_skb_preprocess(struc
- bool *decrypt_error)
- {
- struct ath_hw *ah = common->ah;
+@@ -950,6 +950,7 @@ static int ath9k_rx_skb_preprocess(struc
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ bool discard_current = sc->rx.discard_next;
+ int i, j;
- /*
- * everything but the rate is checked here, the rate check is done
-@@ -962,6 +963,20 @@ static int ath9k_rx_skb_preprocess(struc
+ sc->rx.discard_next = rx_stats->rs_more;
+ if (discard_current)
+@@ -979,6 +980,21 @@ static int ath9k_rx_skb_preprocess(struc
if (rx_stats->rs_moreaggr)
rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
+ j++;
+ }
+
++
+ sc->rx.discard_next = false;
return 0;
}
-
-@@ -1070,7 +1085,7 @@ static int ath_process_fft(struct ath_so
+@@ -1088,7 +1104,7 @@ static int ath_process_fft(struct ath_so
fft_sample.tlv.length = __cpu_to_be16(length);
fft_sample.freq = __cpu_to_be16(ah->curchan->chan->center_freq);
if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
-@@ -940,12 +940,12 @@ void ath_debug_stat_rx(struct ath_softc
+@@ -943,12 +943,12 @@ void ath_debug_stat_rx(struct ath_softc
#ifdef CONFIG_ATH9K_MAC_DEBUG
spin_lock(&sc->debug.samp_lock);
RX_SAMP_DBG(jiffies) = jiffies;
RX_SAMP_DBG(antenna) = rs->rs_antenna;
RX_SAMP_DBG(rssi) = rs->rs_rssi;
RX_SAMP_DBG(rate) = rs->rs_rate;
---- a/include/uapi/linux/nl80211.h
-+++ b/include/uapi/linux/nl80211.h
-@@ -1918,6 +1918,8 @@ enum nl80211_sta_bss_param {
- * @NL80211_STA_INFO_PEER_PM: peer mesh STA link-specific power mode
- * @NL80211_STA_INFO_NONPEER_PM: neighbor mesh STA power save mode towards
- * non-peer STA
-+ * @NL80211_STA_INFO_CHAIN_SIGNAL: per-chain signal strength of last PPDU
-+ * @NL80211_STA_INFO_CHAIN_SIGNAL_AVG: per-chain signal strength average
- * @__NL80211_STA_INFO_AFTER_LAST: internal
- * @NL80211_STA_INFO_MAX: highest possible station info attribute
- */
-@@ -1947,6 +1949,8 @@ enum nl80211_sta_info {
- NL80211_STA_INFO_NONPEER_PM,
- NL80211_STA_INFO_RX_BYTES64,
- NL80211_STA_INFO_TX_BYTES64,
-+ NL80211_STA_INFO_CHAIN_SIGNAL,
-+ NL80211_STA_INFO_CHAIN_SIGNAL_AVG,
-
- /* keep last */
- __NL80211_STA_INFO_AFTER_LAST,
---- a/net/wireless/nl80211.c
-+++ b/net/wireless/nl80211.c
-@@ -3082,6 +3082,32 @@ static bool nl80211_put_sta_rate(struct
- return true;
- }
-
-+static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
-+ int id)
-+{
-+ void *attr;
-+ int i = 0;
-+
-+ if (!mask)
-+ return true;
-+
-+ attr = nla_nest_start(msg, id);
-+ if (!attr)
-+ return false;
-+
-+ for (i = 0; i < 4; i++) {
-+ if (!(mask & BIT(i)))
-+ continue;
-+
-+ if (nla_put_u8(msg, i, signal[i]))
-+ return false;
-+ }
-+
-+ nla_nest_end(msg, attr);
-+
-+ return true;
-+}
-+
- static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
- int flags,
- struct cfg80211_registered_device *rdev,
-@@ -3153,6 +3179,18 @@ static int nl80211_send_station(struct s
- default:
- break;
- }
-+ if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
-+ if (!nl80211_put_signal(msg, sinfo->chains,
-+ sinfo->chain_signal,
-+ NL80211_STA_INFO_CHAIN_SIGNAL))
-+ goto nla_put_failure;
-+ }
-+ if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
-+ if (!nl80211_put_signal(msg, sinfo->chains,
-+ sinfo->chain_signal_avg,
-+ NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
-+ goto nla_put_failure;
-+ }
- if (sinfo->filled & STATION_INFO_TX_BITRATE) {
- if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
- NL80211_STA_INFO_TX_BITRATE))
---- a/net/mac80211/cfg.c
-+++ b/net/mac80211/cfg.c
-@@ -445,6 +445,7 @@ static void sta_set_sinfo(struct sta_inf
- struct ieee80211_sub_if_data *sdata = sta->sdata;
- struct ieee80211_local *local = sdata->local;
- struct timespec uptime;
-+ int i;
-
- sinfo->generation = sdata->local->sta_generation;
-
-@@ -484,6 +485,17 @@ static void sta_set_sinfo(struct sta_inf
- sinfo->signal = (s8)sta->last_signal;
- sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
- }
-+ if (sta->chains) {
-+ sinfo->filled |= STATION_INFO_CHAIN_SIGNAL |
-+ STATION_INFO_CHAIN_SIGNAL_AVG;
-+
-+ sinfo->chains = sta->chains;
-+ for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
-+ sinfo->chain_signal[i] = sta->chain_signal_last[i];
-+ sinfo->chain_signal_avg[i] =
-+ (s8) -ewma_read(&sta->chain_signal_avg[i]);
-+ }
-+ }
-
- sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
- sta_set_rate_info_rx(sta, &sinfo->rxrate);
--- a/drivers/net/wireless/ath/ath9k/dfs.c
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -164,8 +164,8 @@ void ath9k_dfs_process_phyerr(struct ath
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