From: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Date: Tue, 29 Nov 2011 15:00:35 +0000 (+0530)
Subject: ath9k: change the default antenna settings based on diversity
X-Git-Tag: firefly_0821_release~3680^2~3834^2~44^2~268
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=eb840a80d2e5f446ad58a6d4f14dcaa3d877a362;p=firefly-linux-kernel-4.4.55.git

ath9k: change the default antenna settings based on diversity

change the AR_DEF_ANTENNA register settings i.e setting default antenna
setting only for antenna diversity enabled chipsets. no point in
doing this for MIMO chipsets

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 4c8e296f663b..b1b0ec76157b 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -1923,15 +1923,20 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 			skb = hdr_skb;
 		}
 
-		/*
-		 * change the default rx antenna if rx diversity chooses the
-		 * other antenna 3 times in a row.
-		 */
-		if (sc->rx.defant != rs.rs_antenna) {
-			if (++sc->rx.rxotherant >= 3)
-				ath_setdefantenna(sc, rs.rs_antenna);
-		} else {
-			sc->rx.rxotherant = 0;
+
+		if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
+
+			/*
+			 * change the default rx antenna if rx diversity
+			 * chooses the other antenna 3 times in a row.
+			 */
+			if (sc->rx.defant != rs.rs_antenna) {
+				if (++sc->rx.rxotherant >= 3)
+					ath_setdefantenna(sc, rs.rs_antenna);
+			} else {
+				sc->rx.rxotherant = 0;
+			}
+
 		}
 
 		if (rxs->flag & RX_FLAG_MMIC_STRIPPED)