ath9k_htc: Enable SGI in HT20 for AR9271

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

3 files changed, 9 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index 7ec2c2ec9d52..8b202e05034e 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -404,6 +404,9 @@ static void setup_ht_cap(struct ath9k_htc_priv *priv,
                        IEEE80211_HT_CAP_SGI_40 |
                        IEEE80211_HT_CAP_DSSSCCK40;
 
+        if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
+                ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
+
         ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
         ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
 
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 80feeb3a6bf0..6d464237d13a 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -367,9 +367,12 @@ static void ath9k_htc_setup_rate(struct ath9k_htc_priv *priv,
                 caps = WLAN_RC_HT_FLAG;
                 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)
+                if (conf_is_ht40(&priv->hw->conf) &&
+                    (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
+                        caps |= WLAN_RC_SGI_FLAG;
+                else if (conf_is_ht20(&priv->hw->conf) &&
+                         (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20))
                         caps |= WLAN_RC_SGI_FLAG;
-
         }
 
         trate->sta_index = ista->index;
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 2fd62546187a..841c8b05a07c 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2234,7 +2234,7 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
         if (AR_SREV_9300_20_OR_LATER(ah))
                 pCap->hw_caps |= ATH9K_HW_CAP_RAC_SUPPORTED;
 
-        if (AR_SREV_9287_10_OR_LATER(ah))
+        if (AR_SREV_9287_10_OR_LATER(ah) || AR_SREV_9271(ah))
                 pCap->hw_caps |= ATH9K_HW_CAP_SGI_20;
 
         return 0;