diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index aa20d5d56e2f479d625c2411c53228ebaa3876e9..53f7f2e97615d0c80b6c918474b9a9ed2684f333 100644
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -3160,8 +3160,6 @@ static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0414, 0x01F4);
 
 	ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
-	memset(wl->bssid, 0, ETH_ALEN);
-	memset(wl->mac_addr, 0, ETH_ALEN);
 	b43legacy_upload_card_macaddress(dev);
 	b43legacy_security_init(dev);
 	b43legacy_rng_init(wl);
@@ -3263,6 +3261,13 @@ static int b43legacy_op_start(struct ieee80211_hw *hw)
 	 * LEDs that are registered later depend on it. */
 	b43legacy_rfkill_init(dev);
 
+	/* Kill all old instance specific information to make sure
+	 * the card won't use it in the short timeframe between start
+	 * and mac80211 reconfiguring it. */
+	memset(wl->bssid, 0, ETH_ALEN);
+	memset(wl->mac_addr, 0, ETH_ALEN);
+	wl->filter_flags = 0;
+
 	mutex_lock(&wl->mutex);
 
 	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {