ath9k: Add open loop control support

This patch adds Open Loop Control support for Atheros chipsets that
supports open loop power control.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index a4e863191766..6b4731c24736 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1392,6 +1392,7 @@ static void ath_rc_init(struct ath_softc *sc,
         struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
         u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates;
         u8 i, j, k, hi = 0, hthi = 0;
+        struct ath_hw *ah = sc->sc_ah;
 
         /* FIXME: Adhoc */
         if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) ||
@@ -1412,7 +1413,8 @@ static void ath_rc_init(struct ath_softc *sc,
 
         if (sta->ht_cap.ht_supported) {
                 ath_rc_priv->ht_cap = WLAN_RC_HT_FLAG;
-                if (sc->sc_ah->caps.tx_chainmask != 1)
+                if (sc->sc_ah->caps.tx_chainmask != 1 &&
+                        ath9k_hw_getcapability(ah, ATH9K_CAP_DS, 0, NULL))
                         ath_rc_priv->ht_cap |= WLAN_RC_DS_FLAG;
                 if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
                         ath_rc_priv->ht_cap |= WLAN_RC_40_FLAG;