ath9k: Enable SGI correctly

Set the driver specific SGI flag based on the station's
HT capabilities, otherwise rate control uses the wrong rate.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index 4b12c347d188..27ed80b54881 100644
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -1222,11 +1222,14 @@ static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta)
                         caps |= WLAN_RC_TS_FLAG | WLAN_RC_DS_FLAG;
                 else if (sta->ht_cap.mcs.rx_mask[1])
                         caps |= WLAN_RC_DS_FLAG;
-                if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
+                if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
                         caps |= WLAN_RC_40_FLAG;
-                if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40 ||
-                    sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20)
-                        caps |= WLAN_RC_SGI_FLAG;
+                        if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)
+                                caps |= WLAN_RC_SGI_FLAG;
+                } else {
+                        if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20)
+                                caps |= WLAN_RC_SGI_FLAG;
+                }
         }
 
         return caps;