openwrt/package/kernel/mac80211/patches/522-ath9k_per_chain_signal_strength.patch

--- 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_rate;
 	u8 rs_antenna;
 	u8 rs_more;
-	int8_t rs_rssi_ctl0;
-	int8_t rs_rssi_ctl1;
-	int8_t rs_rssi_ctl2;
-	int8_t rs_rssi_ext0;
-	int8_t rs_rssi_ext1;
-	int8_t rs_rssi_ext2;
+	int8_t rs_rssi_ctl[3];
+	int8_t rs_rssi_ext[3];
 	u8 rs_isaggr;
 	u8 rs_moreaggr;
 	u8 rs_num_delims;
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -939,6 +939,7 @@ 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;
 
 	sc->rx.discard_next = rx_stats->rs_more;
 	if (discard_current)
@@ -968,6 +969,21 @@ static int ath9k_rx_skb_preprocess(struc
 	if (rx_stats->rs_moreaggr)
 		rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
 
+	for (i = 0, j = 0; i < ARRAY_SIZE(rx_stats->rs_rssi_ctl); i++) {
+		s8 rssi;
+
+		if (!(ah->rxchainmask & BIT(i)))
+			continue;
+
+		rssi = rx_stats->rs_rssi_ctl[i];
+		if (rssi != ATH9K_RSSI_BAD) {
+		    rx_status->chains |= BIT(j);
+		    rx_status->chain_signal[j] = ah->noise + rssi;
+		}
+		j++;
+	}
+
+
 	sc->rx.discard_next = false;
 	return 0;
 }
@@ -1077,7 +1093,7 @@ 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);
-	fft_sample.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl0);
+	fft_sample.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
 	fft_sample.noise = ah->noise;
 
 	switch (len - SPECTRAL_HT20_TOTAL_DATA_LEN) {
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -476,12 +476,12 @@ int ath9k_hw_process_rxdesc_edma(struct 
 
 	/* XXX: Keycache */
 	rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
-	rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
-	rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
-	rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
-	rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
-	rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
-	rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);
+	rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_RxRSSIAnt00);
+	rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_RxRSSIAnt01);
+	rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_RxRSSIAnt02);
+	rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_RxRSSIAnt10);
+	rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_RxRSSIAnt11);
+	rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_RxRSSIAnt12);
 
 	if (rxsp->status11 & AR_RxKeyIdxValid)
 		rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -554,25 +554,25 @@ int ath9k_hw_rxprocdesc(struct ath_hw *a
 
 	if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
 		rs->rs_rssi = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ctl0 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ctl1 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ctl2 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ext0 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ext1 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ext2 = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
 	} else {
 		rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
-		rs->rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
+		rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
 						AR_RxRSSIAnt00);
-		rs->rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
+		rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
 						AR_RxRSSIAnt01);
-		rs->rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
+		rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
 						AR_RxRSSIAnt02);
-		rs->rs_rssi_ext0 = MS(ads.ds_rxstatus4,
+		rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
 						AR_RxRSSIAnt10);
-		rs->rs_rssi_ext1 = MS(ads.ds_rxstatus4,
+		rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
 						AR_RxRSSIAnt11);
-		rs->rs_rssi_ext2 = MS(ads.ds_rxstatus4,
+		rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
 						AR_RxRSSIAnt12);
 	}
 	if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
--- a/drivers/net/wireless/ath/ath9k/dfs.c
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -158,8 +158,8 @@ void ath9k_dfs_process_phyerr(struct ath
 		return;
 	}
 
-	ard.rssi = rs->rs_rssi_ctl0;
-	ard.ext_rssi = rs->rs_rssi_ext0;
+	ard.rssi = rs->rs_rssi_ctl[0];
+	ard.ext_rssi = rs->rs_rssi_ext[0];
 
 	/*
 	 * hardware stores this as 8 bit signed value.
--- a/drivers/net/wireless/ath/ath9k/antenna.c
+++ b/drivers/net/wireless/ath/ath9k/antenna.c
@@ -546,14 +546,14 @@ void ath_ant_comb_scan(struct ath_softc 
 	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 main_rssi = rs->rs_rssi_ctl[0];
+	int alt_rssi = rs->rs_rssi_ctl[1];
 	int rx_ant_conf,  main_ant_conf;
 	bool short_scan = false;
 
-	rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
+	rx_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_CURRENT_SHIFT) &
 		       ATH_ANT_RX_MASK;
-	main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) &
+	main_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_MAIN_SHIFT) &
 			 ATH_ANT_RX_MASK;
 
 	/* Record packet only when both main_rssi and  alt_rssi is positive */