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 11bc55e3d69759088e34433ce19c74ee9ef9e5b1..70b802529123ba0e81b82ddcef46605e1b8189b5 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;
        }