ath9k: Ensure a fair beacon distribution in IBSS mode

Configure CWmin based on slot time for IBSS mode. This helps
in increasing the beacon distribution of ath9k to accepted
levels in 11a mode.

Signed-off-by: Vivek Natarajan <nataraja@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index 11bc55e..70b8025 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -48,7 +48,10 @@ int ath_beaconq_config(struct ath_softc *sc)
                txq = sc->tx.txq_map[WME_AC_BE];
                ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be);
                qi.tqi_aifs = qi_be.tqi_aifs;
-               qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
+               if (ah->slottime == ATH9K_SLOT_TIME_20)
+                       qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
+               else
+                       qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
                qi.tqi_cwmax = qi_be.tqi_cwmax;
        }