ath9k: simplify beacon configuration for beaconing vifs

As of now beacon configuration is being called multiple times
in bss info change notification. This patch avoids multiple
configuration and make it simpler.
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -817,8 +817,10 @@ void ath9k_set_beaconing_status(struct ath_softc *sc, bool status)
 {
 	struct ath_hw *ah = sc->sc_ah;
 
-	if (!ath_has_valid_bslot(sc))
+	if (!ath_has_valid_bslot(sc)) {
+		sc->sc_flags &= ~SC_OP_BEACONS;
 		return;
+	}
 
 	ath9k_ps_wakeup(sc);
 	if (status) {

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

@@ -1245,7 +1245,6 @@ static void ath9k_reclaim_beacon(struct ath_softc *sc,
 	ath9k_set_beaconing_status(sc, false);
 	ath_beacon_return(sc, avp);
 	ath9k_set_beaconing_status(sc, true);
-	sc->sc_flags &= ~SC_OP_BEACONS;
 }
 
 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
@@ -1376,17 +1375,9 @@ static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
 	ath9k_calculate_summary_state(hw, vif);
 
 	if (ath9k_uses_beacons(vif->type)) {
-		int error;
-		/* This may fail because upper levels do not have beacons
-		 * properly configured yet.  That's OK, we assume it
-		 * will be properly configured and then we will be notified
-		 * in the info_changed method and set up beacons properly
-		 * there.
-		 */
+		/* Reserve a beacon slot for the vif */
 		ath9k_set_beaconing_status(sc, false);
-		error = ath_beacon_alloc(sc, vif);
-		if (!error)
-			ath_beacon_config(sc, vif);
+		ath_beacon_alloc(sc, vif);
 		ath9k_set_beaconing_status(sc, true);
 	}
 }
@@ -1986,7 +1977,6 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
 	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath_vif *avp = (void *)vif->drv_priv;
 	int slottime;
-	int error;
 
 	ath9k_ps_wakeup(sc);
 	mutex_lock(&sc->mutex);
@@ -2019,13 +2009,25 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
 		}
 	}
 
-	/* Enable transmission of beacons (AP, IBSS, MESH) */
-	if ((changed & BSS_CHANGED_BEACON) ||
-	    ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
+	/*
+	 * In case of AP mode, the HW TSF has to be reset
+	 * when the beacon interval changes.
+	 */
+	if ((changed & BSS_CHANGED_BEACON_INT) &&
+	    (vif->type == NL80211_IFTYPE_AP))
+		sc->sc_flags |= SC_OP_TSF_RESET;
+
+	/* Configure beaconing (AP, IBSS, MESH) */
+	if (ath9k_uses_beacons(vif->type) &&
+	    ((changed & BSS_CHANGED_BEACON) ||
+	     (changed & BSS_CHANGED_BEACON_ENABLED) ||
+	     (changed & BSS_CHANGED_BEACON_INT))) {
 		ath9k_set_beaconing_status(sc, false);
-		error = ath_beacon_alloc(sc, vif);
-		if (!error)
-			ath_beacon_config(sc, vif);
+		if (bss_conf->enable_beacon)
+			ath_beacon_alloc(sc, vif);
+		else
+			avp->is_bslot_active = false;
+		ath_beacon_config(sc, vif);
 		ath9k_set_beaconing_status(sc, true);
 	}
 
@@ -2048,30 +2050,6 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
 		}
 	}
 
-	/* Disable transmission of beacons */
-	if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
-	    !bss_conf->enable_beacon) {
-		ath9k_set_beaconing_status(sc, false);
-		avp->is_bslot_active = false;
-		ath9k_set_beaconing_status(sc, true);
-	}
-
-	if (changed & BSS_CHANGED_BEACON_INT) {
-		/*
-		 * In case of AP mode, the HW TSF has to be reset
-		 * when the beacon interval changes.
-		 */
-		if (vif->type == NL80211_IFTYPE_AP) {
-			sc->sc_flags |= SC_OP_TSF_RESET;
-			ath9k_set_beaconing_status(sc, false);
-			error = ath_beacon_alloc(sc, vif);
-			if (!error)
-				ath_beacon_config(sc, vif);
-			ath9k_set_beaconing_status(sc, true);
-		} else
-			ath_beacon_config(sc, vif);
-	}
-
 	mutex_unlock(&sc->mutex);
 	ath9k_ps_restore(sc);
 }