ath9k: cleanup beacon parameters configuration

This patch configures the beacon timers with beacon interval
and beacon period passed through vif.bss_conf. Also cache the
currecnt beacon configuration which will be used to configure
the beacon timers when the driver triggers it after reset.
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -600,6 +600,7 @@ struct ath_softc {
 	struct ath9k_debug debug;
 #endif
 	struct ath_bus_ops *bus_ops;
+	struct ath_beacon_config cur_beacon_conf;
 };
 
 struct ath_wiphy {

drivers/net/wireless/ath/ath9k/beacon.c

@@ -695,36 +695,44 @@ static void ath_beacon_config_adhoc(struct ath_softc *sc,
 	sc->beacon.bmisscnt = 0;
 	ath9k_hw_set_interrupts(sc->sc_ah, sc->imask);
 
-	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)
+	/* FIXME: Handle properly when vif is NULL */
+	if (vif && sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)
 		ath_beacon_start_adhoc(sc, vif);
 }
 
 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
 {
-	struct ath_beacon_config conf;
+	struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
+	enum nl80211_iftype iftype;
 
 	/* Setup the beacon configuration parameters */
 
-	memset(&conf, 0, sizeof(struct ath_beacon_config));
-	conf.beacon_interval = sc->beacon_interval ? : ATH_DEFAULT_BINTVAL;
-	conf.listen_interval = 1;
-	conf.dtim_period = conf.beacon_interval;
-	conf.dtim_count = 1;
-	conf.bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf.beacon_interval;
-
 	if (vif) {
-		struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
+		struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+
+		iftype = vif->type;
 
-		switch(avp->av_opmode) {
+		cur_conf->beacon_interval = bss_conf->beacon_int;
+		cur_conf->dtim_period = bss_conf->dtim_period;
+		cur_conf->listen_interval = 1;
+		cur_conf->dtim_count = 1;
+		cur_conf->bmiss_timeout =
+			ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
+	} else {
+		iftype = sc->sc_ah->opmode;
+	}
+
+
+	switch (iftype) {
 	case NL80211_IFTYPE_AP:
-			ath_beacon_config_ap(sc, &conf);
+		ath_beacon_config_ap(sc, cur_conf);
 		break;
 	case NL80211_IFTYPE_ADHOC:
 	case NL80211_IFTYPE_MESH_POINT:
-			ath_beacon_config_adhoc(sc, &conf, vif);
+		ath_beacon_config_adhoc(sc, cur_conf, vif);
 		break;
 	case NL80211_IFTYPE_STATION:
-			ath_beacon_config_sta(sc, &conf);
+		ath_beacon_config_sta(sc, cur_conf);
 		break;
 	default:
 		DPRINTF(sc, ATH_DBG_CONFIG,
@@ -733,5 +741,4 @@ void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
 	}
 
 	sc->sc_flags |= SC_OP_BEACONS;
-	}
 }