rsi: handle station disconnection in AP mode

{

	struct rsi_hw *adapter = hw->priv;

	struct rsi_common *common = adapter->priv;

	struct ieee80211_bss_conf *bss = &vif->bss_conf;

	struct rsi_sta *rsta;

	rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);

	mutex_lock(&common->mutex);

	if (vif->type == NL80211_IFTYPE_AP) {

		u8 sta_idx, cnt;

		/* Send peer notify to device */

		rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");

		for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {

			rsta = &common->stations[sta_idx];

			if (!rsta->sta)

				continue;

			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {

				rsi_inform_bss_status(common, AP_OPMODE, 0,

						      sta->addr, sta->wme,

						      sta->aid, sta, sta_idx);

				rsta->sta = NULL;

				rsta->sta_id = -1;

				for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)

					rsta->start_tx_aggr[cnt] = false;

				if (common->num_stations > 0)

					common->num_stations--;

				break;

			}

		}

		if (sta_idx >= common->max_stations)

			rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);

	}

	if (vif->type == NL80211_IFTYPE_STATION) {

		/* Resetting all the fields to default values */

		memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);

		bss->qos = sta->wme;

		common->bitrate_mask[NL80211_BAND_2GHZ] = 0;

		common->bitrate_mask[NL80211_BAND_5GHZ] = 0;

		common->min_rate = 0xffff;

		common->vif_info[0].seq_start = 0;

		common->secinfo.ptk_cipher = 0;

		common->secinfo.gtk_cipher = 0;

		if (!common->iface_down)

			rsi_send_rx_filter_frame(common, 0);

	}

	mutex_unlock(&common->mutex);

	return 0;