2012-09-12 09:30:55

by Sujith Manoharan

[permalink] [raw]
Subject: [PATCH] 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 <[email protected]>
---
drivers/net/wireless/ath/ath9k/rc.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index 4b12c34..27ed80b 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;
--
1.7.12