mac80211: rename files

This patch renames all mac80211 files (except ieee80211_i.h) to get rid
of the useless ieee80211_ prefix.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1889 insertions, 0 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
new file mode 100644
index 0000000..bfcbcf5
--- /dev/null
+++ b/net/mac80211/main.c
@@ -0,0 +1,1889 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/mac80211.h>
+#include <net/ieee80211_radiotap.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/wireless.h>
+#include <linux/rtnetlink.h>
+#include <linux/bitmap.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+
+#include "ieee80211_i.h"
+#include "rate.h"
+#include "mesh.h"
+#include "wep.h"
+#include "wme.h"
+#include "aes_ccm.h"
+#include "led.h"
+#include "cfg.h"
+#include "debugfs.h"
+#include "debugfs_netdev.h"
+
+#define SUPP_MCS_SET_LEN 16
+
+/*
+ * For seeing transmitted packets on monitor interfaces
+ * we have a radiotap header too.
+ */
+struct ieee80211_tx_status_rtap_hdr {
+	struct ieee80211_radiotap_header hdr;
+	__le16 tx_flags;
+	u8 data_retries;
+} __attribute__ ((packed));
+
+/* common interface routines */
+
+static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
+{
+	memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
+	return ETH_ALEN;
+}
+
+/* must be called under mdev tx lock */
+static void ieee80211_configure_filter(struct ieee80211_local *local)
+{
+	unsigned int changed_flags;
+	unsigned int new_flags = 0;
+
+	if (atomic_read(&local->iff_promiscs))
+		new_flags |= FIF_PROMISC_IN_BSS;
+
+	if (atomic_read(&local->iff_allmultis))
+		new_flags |= FIF_ALLMULTI;
+
+	if (local->monitors)
+		new_flags |= FIF_BCN_PRBRESP_PROMISC;
+
+	if (local->fif_fcsfail)
+		new_flags |= FIF_FCSFAIL;
+
+	if (local->fif_plcpfail)
+		new_flags |= FIF_PLCPFAIL;
+
+	if (local->fif_control)
+		new_flags |= FIF_CONTROL;
+
+	if (local->fif_other_bss)
+		new_flags |= FIF_OTHER_BSS;
+
+	changed_flags = local->filter_flags ^ new_flags;
+
+	/* be a bit nasty */
+	new_flags |= (1<<31);
+
+	local->ops->configure_filter(local_to_hw(local),
+				     changed_flags, &new_flags,
+				     local->mdev->mc_count,
+				     local->mdev->mc_list);
+
+	WARN_ON(new_flags & (1<<31));
+
+	local->filter_flags = new_flags & ~(1<<31);
+}
+
+/* master interface */
+
+static int ieee80211_master_open(struct net_device *dev)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_sub_if_data *sdata;
+	int res = -EOPNOTSUPP;
+
+	/* we hold the RTNL here so can safely walk the list */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (sdata->dev != dev && netif_running(sdata->dev)) {
+			res = 0;
+			break;
+		}
+	}
+	return res;
+}
+
+static int ieee80211_master_stop(struct net_device *dev)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_sub_if_data *sdata;
+
+	/* we hold the RTNL here so can safely walk the list */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		if (sdata->dev != dev && netif_running(sdata->dev))
+			dev_close(sdata->dev);
+
+	return 0;
+}
+
+static void ieee80211_master_set_multicast_list(struct net_device *dev)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+
+	ieee80211_configure_filter(local);
+}
+
+/* regular interfaces */
+
+static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
+{
+	int meshhdrlen;
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
+
+	/* FIX: what would be proper limits for MTU?
+	 * This interface uses 802.3 frames. */
+	if (new_mtu < 256 ||
+		new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
+		printk(KERN_WARNING "%s: invalid MTU %d\n",
+		       dev->name, new_mtu);
+		return -EINVAL;
+	}
+
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+	printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+	dev->mtu = new_mtu;
+	return 0;
+}
+
+static inline int identical_mac_addr_allowed(int type1, int type2)
+{
+	return (type1 == IEEE80211_IF_TYPE_MNTR ||
+		type2 == IEEE80211_IF_TYPE_MNTR ||
+		(type1 == IEEE80211_IF_TYPE_AP &&
+		 type2 == IEEE80211_IF_TYPE_WDS) ||
+		(type1 == IEEE80211_IF_TYPE_WDS &&
+		 (type2 == IEEE80211_IF_TYPE_WDS ||
+		  type2 == IEEE80211_IF_TYPE_AP)) ||
+		(type1 == IEEE80211_IF_TYPE_AP &&
+		 type2 == IEEE80211_IF_TYPE_VLAN) ||
+		(type1 == IEEE80211_IF_TYPE_VLAN &&
+		 (type2 == IEEE80211_IF_TYPE_AP ||
+		  type2 == IEEE80211_IF_TYPE_VLAN)));
+}
+
+static int ieee80211_open(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata, *nsdata;
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_if_init_conf conf;
+	int res;
+	bool need_hw_reconfig = 0;
+	struct sta_info *sta;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	/* we hold the RTNL here so can safely walk the list */
+	list_for_each_entry(nsdata, &local->interfaces, list) {
+		struct net_device *ndev = nsdata->dev;
+
+		if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
+			/*
+			 * Allow only a single IBSS interface to be up at any
+			 * time. This is restricted because beacon distribution
+			 * cannot work properly if both are in the same IBSS.
+			 *
+			 * To remove this restriction we'd have to disallow them
+			 * from setting the same SSID on different IBSS interfaces
+			 * belonging to the same hardware. Then, however, we're
+			 * faced with having to adopt two different TSF timers...
+			 */
+			if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
+			    nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
+				return -EBUSY;
+
+			/*
+			 * Disallow multiple IBSS/STA mode interfaces.
+			 *
+			 * This is a technical restriction, it is possible although
+			 * most likely not IEEE 802.11 compliant to have multiple
+			 * STAs with just a single hardware (the TSF timer will not
+			 * be adjusted properly.)
+			 *
+			 * However, because mac80211 uses the master device's BSS
+			 * information for each STA/IBSS interface, doing this will
+			 * currently corrupt that BSS information completely, unless,
+			 * a not very useful case, both STAs are associated to the
+			 * same BSS.
+			 *
+			 * To remove this restriction, the BSS information needs to
+			 * be embedded in the STA/IBSS mode sdata instead of using
+			 * the master device's BSS structure.
+			 */
+			if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
+			     sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
+			    (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
+			     nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
+				return -EBUSY;
+
+			/*
+			 * The remaining checks are only performed for interfaces
+			 * with the same MAC address.
+			 */
+			if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
+				continue;
+
+			/*
+			 * check whether it may have the same address
+			 */
+			if (!identical_mac_addr_allowed(sdata->vif.type,
+							nsdata->vif.type))
+				return -ENOTUNIQ;
+
+			/*
+			 * can only add VLANs to enabled APs
+			 */
+			if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
+			    nsdata->vif.type == IEEE80211_IF_TYPE_AP)
+				sdata->u.vlan.ap = nsdata;
+		}
+	}
+
+	switch (sdata->vif.type) {
+	case IEEE80211_IF_TYPE_WDS:
+		if (is_zero_ether_addr(sdata->u.wds.remote_addr))
+			return -ENOLINK;
+
+		/* Create STA entry for the WDS peer */
+		sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
+				     GFP_KERNEL);
+		if (!sta)
+			return -ENOMEM;
+
+		sta->flags |= WLAN_STA_AUTHORIZED;
+
+		res = sta_info_insert(sta);
+		if (res) {
+			/* STA has been freed */
+			return res;
+		}
+		break;
+	case IEEE80211_IF_TYPE_VLAN:
+		if (!sdata->u.vlan.ap)
+			return -ENOLINK;
+		break;
+	case IEEE80211_IF_TYPE_AP:
+	case IEEE80211_IF_TYPE_STA:
+	case IEEE80211_IF_TYPE_MNTR:
+	case IEEE80211_IF_TYPE_IBSS:
+	case IEEE80211_IF_TYPE_MESH_POINT:
+		/* no special treatment */
+		break;
+	case IEEE80211_IF_TYPE_INVALID:
+		/* cannot happen */
+		WARN_ON(1);
+		break;
+	}
+
+	if (local->open_count == 0) {
+		res = 0;
+		if (local->ops->start)
+			res = local->ops->start(local_to_hw(local));
+		if (res)
+			return res;
+		need_hw_reconfig = 1;
+		ieee80211_led_radio(local, local->hw.conf.radio_enabled);
+	}
+
+	switch (sdata->vif.type) {
+	case IEEE80211_IF_TYPE_VLAN:
+		list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
+		/* no need to tell driver */
+		break;
+	case IEEE80211_IF_TYPE_MNTR:
+		if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
+			local->cooked_mntrs++;
+			break;
+		}
+
+		/* must be before the call to ieee80211_configure_filter */
+		local->monitors++;
+		if (local->monitors == 1)
+			local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
+
+		if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
+			local->fif_fcsfail++;
+		if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
+			local->fif_plcpfail++;
+		if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
+			local->fif_control++;
+		if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
+			local->fif_other_bss++;
+
+		netif_tx_lock_bh(local->mdev);
+		ieee80211_configure_filter(local);
+		netif_tx_unlock_bh(local->mdev);
+		break;
+	case IEEE80211_IF_TYPE_STA:
+	case IEEE80211_IF_TYPE_IBSS:
+		sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
+		/* fall through */
+	default:
+		conf.vif = &sdata->vif;
+		conf.type = sdata->vif.type;
+		conf.mac_addr = dev->dev_addr;
+		res = local->ops->add_interface(local_to_hw(local), &conf);
+		if (res && !local->open_count && local->ops->stop)
+			local->ops->stop(local_to_hw(local));
+		if (res)
+			return res;
+
+		ieee80211_if_config(dev);
+		ieee80211_reset_erp_info(dev);
+		ieee80211_enable_keys(sdata);
+
+		if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
+		    !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
+			netif_carrier_off(dev);
+		else
+			netif_carrier_on(dev);
+	}
+
+	if (local->open_count == 0) {
+		res = dev_open(local->mdev);
+		WARN_ON(res);
+		tasklet_enable(&local->tx_pending_tasklet);
+		tasklet_enable(&local->tasklet);
+	}
+
+	/*
+	 * set_multicast_list will be invoked by the networking core
+	 * which will check whether any increments here were done in
+	 * error and sync them down to the hardware as filter flags.
+	 */
+	if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+		atomic_inc(&local->iff_allmultis);
+
+	if (sdata->flags & IEEE80211_SDATA_PROMISC)
+		atomic_inc(&local->iff_promiscs);
+
+	local->open_count++;
+	if (need_hw_reconfig)
+		ieee80211_hw_config(local);
+
+	/*
+	 * ieee80211_sta_work is disabled while network interface
+	 * is down. Therefore, some configuration changes may not
+	 * yet be effective. Trigger execution of ieee80211_sta_work
+	 * to fix this.
+	 */
+	if(sdata->vif.type == IEEE80211_IF_TYPE_STA ||
+	   sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
+		struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+		queue_work(local->hw.workqueue, &ifsta->work);
+	}
+
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+static int ieee80211_stop(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_init_conf conf;
+	struct sta_info *sta;
+
+	/*
+	 * Stop TX on this interface first.
+	 */
+	netif_stop_queue(dev);
+
+	/*
+	 * Now delete all active aggregation sessions.
+	 */
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sta->sdata == sdata)
+			ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
+	}
+
+	rcu_read_unlock();
+
+	/*
+	 * Remove all stations associated with this interface.
+	 *
+	 * This must be done before calling ops->remove_interface()
+	 * because otherwise we can later invoke ops->sta_notify()
+	 * whenever the STAs are removed, and that invalidates driver
+	 * assumptions about always getting a vif pointer that is valid
+	 * (because if we remove a STA after ops->remove_interface()
+	 * the driver will have removed the vif info already!)
+	 *
+	 * We could relax this and only unlink the stations from the
+	 * hash table and list but keep them on a per-sdata list that
+	 * will be inserted back again when the interface is brought
+	 * up again, but I don't currently see a use case for that,
+	 * except with WDS which gets a STA entry created when it is
+	 * brought up.
+	 */
+	sta_info_flush(local, sdata);
+
+	/*
+	 * Don't count this interface for promisc/allmulti while it
+	 * is down. dev_mc_unsync() will invoke set_multicast_list
+	 * on the master interface which will sync these down to the
+	 * hardware as filter flags.
+	 */
+	if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+		atomic_dec(&local->iff_allmultis);
+
+	if (sdata->flags & IEEE80211_SDATA_PROMISC)
+		atomic_dec(&local->iff_promiscs);
+
+	dev_mc_unsync(local->mdev, dev);
+
+	/* APs need special treatment */
+	if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
+		struct ieee80211_sub_if_data *vlan, *tmp;
+		struct beacon_data *old_beacon = sdata->u.ap.beacon;
+
+		/* remove beacon */
+		rcu_assign_pointer(sdata->u.ap.beacon, NULL);
+		synchronize_rcu();
+		kfree(old_beacon);
+
+		/* down all dependent devices, that is VLANs */
+		list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
+					 u.vlan.list)
+			dev_close(vlan->dev);
+		WARN_ON(!list_empty(&sdata->u.ap.vlans));
+	}
+
+	local->open_count--;
+
+	switch (sdata->vif.type) {
+	case IEEE80211_IF_TYPE_VLAN:
+		list_del(&sdata->u.vlan.list);
+		sdata->u.vlan.ap = NULL;
+		/* no need to tell driver */
+		break;
+	case IEEE80211_IF_TYPE_MNTR:
+		if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
+			local->cooked_mntrs--;
+			break;
+		}
+
+		local->monitors--;
+		if (local->monitors == 0)
+			local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
+
+		if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
+			local->fif_fcsfail--;
+		if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
+			local->fif_plcpfail--;
+		if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
+			local->fif_control--;
+		if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
+			local->fif_other_bss--;
+
+		netif_tx_lock_bh(local->mdev);
+		ieee80211_configure_filter(local);
+		netif_tx_unlock_bh(local->mdev);
+		break;
+	case IEEE80211_IF_TYPE_MESH_POINT:
+	case IEEE80211_IF_TYPE_STA:
+	case IEEE80211_IF_TYPE_IBSS:
+		sdata->u.sta.state = IEEE80211_DISABLED;
+		del_timer_sync(&sdata->u.sta.timer);
+		/*
+		 * When we get here, the interface is marked down.
+		 * Call synchronize_rcu() to wait for the RX path
+		 * should it be using the interface and enqueuing
+		 * frames at this very time on another CPU.
+		 */
+		synchronize_rcu();
+		skb_queue_purge(&sdata->u.sta.skb_queue);
+
+		if (local->scan_dev == sdata->dev) {
+			if (!local->ops->hw_scan) {
+				local->sta_sw_scanning = 0;
+				cancel_delayed_work(&local->scan_work);
+			} else
+				local->sta_hw_scanning = 0;
+		}
+
+		flush_workqueue(local->hw.workqueue);
+
+		sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
+		kfree(sdata->u.sta.extra_ie);
+		sdata->u.sta.extra_ie = NULL;
+		sdata->u.sta.extra_ie_len = 0;
+		/* fall through */
+	default:
+		conf.vif = &sdata->vif;
+		conf.type = sdata->vif.type;
+		conf.mac_addr = dev->dev_addr;
+		/* disable all keys for as long as this netdev is down */
+		ieee80211_disable_keys(sdata);
+		local->ops->remove_interface(local_to_hw(local), &conf);
+	}
+
+	if (local->open_count == 0) {
+		if (netif_running(local->mdev))
+			dev_close(local->mdev);
+
+		if (local->ops->stop)
+			local->ops->stop(local_to_hw(local));
+
+		ieee80211_led_radio(local, 0);
+
+		tasklet_disable(&local->tx_pending_tasklet);
+		tasklet_disable(&local->tasklet);
+	}
+
+	return 0;
+}
+
+int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct sta_info *sta;
+	struct ieee80211_sub_if_data *sdata;
+	u16 start_seq_num = 0;
+	u8 *state;
+	int ret;
+	DECLARE_MAC_BUF(mac);
+
+	if (tid >= STA_TID_NUM)
+		return -EINVAL;
+
+#ifdef CONFIG_MAC80211_HT_DEBUG
+	printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
+				print_mac(mac, ra), tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+
+	rcu_read_lock();
+
+	sta = sta_info_get(local, ra);
+	if (!sta) {
+		printk(KERN_DEBUG "Could not find the station\n");
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+
+	spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
+
+	/* we have tried too many times, receiver does not want A-MPDU */
+	if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
+		ret = -EBUSY;
+		goto start_ba_exit;
+	}
+
+	state = &sta->ampdu_mlme.tid_state_tx[tid];
+	/* check if the TID is not in aggregation flow already */
+	if (*state != HT_AGG_STATE_IDLE) {
+#ifdef CONFIG_MAC80211_HT_DEBUG
+		printk(KERN_DEBUG "BA request denied - session is not "
+				 "idle on tid %u\n", tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+		ret = -EAGAIN;
+		goto start_ba_exit;
+	}
+
+	/* prepare A-MPDU MLME for Tx aggregation */
+	sta->ampdu_mlme.tid_tx[tid] =
+			kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
+	if (!sta->ampdu_mlme.tid_tx[tid]) {
+		if (net_ratelimit())
+			printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
+					tid);
+		ret = -ENOMEM;
+		goto start_ba_exit;
+	}
+	/* Tx timer */
+	sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
+			sta_addba_resp_timer_expired;
+	sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
+			(unsigned long)&sta->timer_to_tid[tid];
+	init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
+
+	/* ensure that TX flow won't interrupt us
+	 * until the end of the call to requeue function */
+	spin_lock_bh(&local->mdev->queue_lock);
+
+	/* create a new queue for this aggregation */
+	ret = ieee80211_ht_agg_queue_add(local, sta, tid);
+
+	/* case no queue is available to aggregation
+	 * don't switch to aggregation */
+	if (ret) {
+#ifdef CONFIG_MAC80211_HT_DEBUG
+		printk(KERN_DEBUG "BA request denied - queue unavailable for"
+					" tid %d\n", tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+		goto start_ba_err;
+	}
+	sdata = sta->sdata;
+
+	/* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
+	 * call back right away, it must see that the flow has begun */
+	*state |= HT_ADDBA_REQUESTED_MSK;
+
+	if (local->ops->ampdu_action)
+		ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
+						ra, tid, &start_seq_num);
+
+	if (ret) {
+		/* No need to requeue the packets in the agg queue, since we
+		 * held the tx lock: no packet could be enqueued to the newly
+		 * allocated queue */
+		 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
+#ifdef CONFIG_MAC80211_HT_DEBUG
+		printk(KERN_DEBUG "BA request denied - HW unavailable for"
+					" tid %d\n", tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+		*state = HT_AGG_STATE_IDLE;
+		goto start_ba_err;
+	}
+
+	/* Will put all the packets in the new SW queue */
+	ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
+	spin_unlock_bh(&local->mdev->queue_lock);
+
+	/* send an addBA request */
+	sta->ampdu_mlme.dialog_token_allocator++;
+	sta->ampdu_mlme.tid_tx[tid]->dialog_token =
+			sta->ampdu_mlme.dialog_token_allocator;
+	sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
+
+	ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
+			 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
+			 sta->ampdu_mlme.tid_tx[tid]->ssn,
+			 0x40, 5000);
+
+	/* activate the timer for the recipient's addBA response */
+	sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
+				jiffies + ADDBA_RESP_INTERVAL;
+	add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
+	printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
+	goto start_ba_exit;
+
+start_ba_err:
+	kfree(sta->ampdu_mlme.tid_tx[tid]);
+	sta->ampdu_mlme.tid_tx[tid] = NULL;
+	spin_unlock_bh(&local->mdev->queue_lock);
+	ret = -EBUSY;
+start_ba_exit:
+	spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
+
+int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
+				 u8 *ra, u16 tid,
+				 enum ieee80211_back_parties initiator)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct sta_info *sta;
+	u8 *state;
+	int ret = 0;
+	DECLARE_MAC_BUF(mac);
+
+	if (tid >= STA_TID_NUM)
+		return -EINVAL;
+
+	rcu_read_lock();
+	sta = sta_info_get(local, ra);
+	if (!sta) {
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+
+	/* check if the TID is in aggregation */
+	state = &sta->ampdu_mlme.tid_state_tx[tid];
+	spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
+
+	if (*state != HT_AGG_STATE_OPERATIONAL) {
+		ret = -ENOENT;
+		goto stop_BA_exit;
+	}
+
+#ifdef CONFIG_MAC80211_HT_DEBUG
+	printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
+				print_mac(mac, ra), tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+
+	ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
+
+	*state = HT_AGG_STATE_REQ_STOP_BA_MSK |
+		(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
+
+	if (local->ops->ampdu_action)
+		ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
+						ra, tid, NULL);
+
+	/* case HW denied going back to legacy */
+	if (ret) {
+		WARN_ON(ret != -EBUSY);
+		*state = HT_AGG_STATE_OPERATIONAL;
+		ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
+		goto stop_BA_exit;
+	}
+
+stop_BA_exit:
+	spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
+
+void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct sta_info *sta;
+	u8 *state;
+	DECLARE_MAC_BUF(mac);
+
+	if (tid >= STA_TID_NUM) {
+		printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
+				tid, STA_TID_NUM);
+		return;
+	}
+
+	rcu_read_lock();
+	sta = sta_info_get(local, ra);
+	if (!sta) {
+		rcu_read_unlock();
+		printk(KERN_DEBUG "Could not find station: %s\n",
+				print_mac(mac, ra));
+		return;
+	}
+
+	state = &sta->ampdu_mlme.tid_state_tx[tid];
+	spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
+
+	if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
+		printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
+				*state);
+		spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+		rcu_read_unlock();
+		return;
+	}
+
+	WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
+
+	*state |= HT_ADDBA_DRV_READY_MSK;
+
+	if (*state == HT_AGG_STATE_OPERATIONAL) {
+		printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
+		ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
+	}
+	spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
+
+void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct sta_info *sta;
+	u8 *state;
+	int agg_queue;
+	DECLARE_MAC_BUF(mac);
+
+	if (tid >= STA_TID_NUM) {
+		printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
+				tid, STA_TID_NUM);
+		return;
+	}
+
+#ifdef CONFIG_MAC80211_HT_DEBUG
+	printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
+				print_mac(mac, ra), tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+
+	rcu_read_lock();
+	sta = sta_info_get(local, ra);
+	if (!sta) {
+		printk(KERN_DEBUG "Could not find station: %s\n",
+				print_mac(mac, ra));
+		rcu_read_unlock();
+		return;
+	}
+	state = &sta->ampdu_mlme.tid_state_tx[tid];
+
+	spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
+	if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
+		printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
+		spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+		rcu_read_unlock();
+		return;
+	}
+
+	if (*state & HT_AGG_STATE_INITIATOR_MSK)
+		ieee80211_send_delba(sta->sdata->dev, ra, tid,
+			WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
+
+	agg_queue = sta->tid_to_tx_q[tid];
+
+	/* avoid ordering issues: we are the only one that can modify
+	 * the content of the qdiscs */
+	spin_lock_bh(&local->mdev->queue_lock);
+	/* remove the queue for this aggregation */
+	ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
+	spin_unlock_bh(&local->mdev->queue_lock);
+
+	/* we just requeued the all the frames that were in the removed
+	 * queue, and since we might miss a softirq we do netif_schedule.
+	 * ieee80211_wake_queue is not used here as this queue is not
+	 * necessarily stopped */
+	netif_schedule(local->mdev);
+	*state = HT_AGG_STATE_IDLE;
+	sta->ampdu_mlme.addba_req_num[tid] = 0;
+	kfree(sta->ampdu_mlme.tid_tx[tid]);
+	sta->ampdu_mlme.tid_tx[tid] = NULL;
+	spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
+
+void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
+				      const u8 *ra, u16 tid)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_ra_tid *ra_tid;
+	struct sk_buff *skb = dev_alloc_skb(0);
+
+	if (unlikely(!skb)) {
+		if (net_ratelimit())
+			printk(KERN_WARNING "%s: Not enough memory, "
+			       "dropping start BA session", skb->dev->name);
+		return;
+	}
+	ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
+	memcpy(&ra_tid->ra, ra, ETH_ALEN);
+	ra_tid->tid = tid;
+
+	skb->pkt_type = IEEE80211_ADDBA_MSG;
+	skb_queue_tail(&local->skb_queue, skb);
+	tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
+
+void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
+				     const u8 *ra, u16 tid)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_ra_tid *ra_tid;
+	struct sk_buff *skb = dev_alloc_skb(0);
+
+	if (unlikely(!skb)) {
+		if (net_ratelimit())
+			printk(KERN_WARNING "%s: Not enough memory, "
+			       "dropping stop BA session", skb->dev->name);
+		return;
+	}
+	ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
+	memcpy(&ra_tid->ra, ra, ETH_ALEN);
+	ra_tid->tid = tid;
+
+	skb->pkt_type = IEEE80211_DELBA_MSG;
+	skb_queue_tail(&local->skb_queue, skb);
+	tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
+
+static void ieee80211_set_multicast_list(struct net_device *dev)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int allmulti, promisc, sdata_allmulti, sdata_promisc;
+
+	allmulti = !!(dev->flags & IFF_ALLMULTI);
+	promisc = !!(dev->flags & IFF_PROMISC);
+	sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
+	sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
+
+	if (allmulti != sdata_allmulti) {
+		if (dev->flags & IFF_ALLMULTI)
+			atomic_inc(&local->iff_allmultis);
+		else
+			atomic_dec(&local->iff_allmultis);
+		sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
+	}
+
+	if (promisc != sdata_promisc) {
+		if (dev->flags & IFF_PROMISC)
+			atomic_inc(&local->iff_promiscs);
+		else
+			atomic_dec(&local->iff_promiscs);
+		sdata->flags ^= IEEE80211_SDATA_PROMISC;
+	}
+
+	dev_mc_sync(local->mdev, dev);
+}
+
+static const struct header_ops ieee80211_header_ops = {
+	.create		= eth_header,
+	.parse		= header_parse_80211,
+	.rebuild	= eth_rebuild_header,
+	.cache		= eth_header_cache,
+	.cache_update	= eth_header_cache_update,
+};
+
+/* Must not be called for mdev */
+void ieee80211_if_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+	dev->hard_start_xmit = ieee80211_subif_start_xmit;
+	dev->wireless_handlers = &ieee80211_iw_handler_def;
+	dev->set_multicast_list = ieee80211_set_multicast_list;
+	dev->change_mtu = ieee80211_change_mtu;
+	dev->open = ieee80211_open;
+	dev->stop = ieee80211_stop;
+	dev->destructor = ieee80211_if_free;
+}
+
+/* everything else */
+
+static int __ieee80211_if_config(struct net_device *dev,
+				 struct sk_buff *beacon,
+				 struct ieee80211_tx_control *control)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_if_conf conf;
+
+	if (!local->ops->config_interface || !netif_running(dev))
+		return 0;
+
+	memset(&conf, 0, sizeof(conf));
+	conf.type = sdata->vif.type;
+	if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
+	    sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
+		conf.bssid = sdata->u.sta.bssid;
+		conf.ssid = sdata->u.sta.ssid;
+		conf.ssid_len = sdata->u.sta.ssid_len;
+	} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		conf.beacon = beacon;
+		ieee80211_start_mesh(dev);
+	} else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
+		conf.ssid = sdata->u.ap.ssid;
+		conf.ssid_len = sdata->u.ap.ssid_len;
+		conf.beacon = beacon;
+		conf.beacon_control = control;
+	}
+	return local->ops->config_interface(local_to_hw(local),
+					    &sdata->vif, &conf);
+}
+
+int ieee80211_if_config(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
+	    (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
+		return ieee80211_if_config_beacon(dev);
+	return __ieee80211_if_config(dev, NULL, NULL);
+}
+
+int ieee80211_if_config_beacon(struct net_device *dev)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_tx_control control;
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct sk_buff *skb;
+
+	if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
+		return 0;
+	skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
+				   &control);
+	if (!skb)
+		return -ENOMEM;
+	return __ieee80211_if_config(dev, skb, &control);
+}
+
+int ieee80211_hw_config(struct ieee80211_local *local)
+{
+	struct ieee80211_channel *chan;
+	int ret = 0;
+
+	if (local->sta_sw_scanning)
+		chan = local->scan_channel;
+	else
+		chan = local->oper_channel;
+
+	local->hw.conf.channel = chan;
+
+	if (!local->hw.conf.power_level)
+		local->hw.conf.power_level = chan->max_power;
+	else
+		local->hw.conf.power_level = min(chan->max_power,
+					       local->hw.conf.power_level);
+
+	local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
+
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+	printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
+	       wiphy_name(local->hw.wiphy), chan->center_freq);
+#endif
+
+	if (local->open_count)
+		ret = local->ops->config(local_to_hw(local), &local->hw.conf);
+
+	return ret;
+}
+
+/**
+ * ieee80211_handle_ht should be used only after legacy configuration
+ * has been determined namely band, as ht configuration depends upon
+ * the hardware's HT abilities for a _specific_ band.
+ */
+u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
+			   struct ieee80211_ht_info *req_ht_cap,
+			   struct ieee80211_ht_bss_info *req_bss_cap)
+{
+	struct ieee80211_conf *conf = &local->hw.conf;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_ht_info ht_conf;
+	struct ieee80211_ht_bss_info ht_bss_conf;
+	int i;
+	u32 changed = 0;
+
+	sband = local->hw.wiphy->bands[conf->channel->band];
+
+	/* HT is not supported */
+	if (!sband->ht_info.ht_supported) {
+		conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
+		return 0;
+	}
+
+	memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
+	memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
+
+	if (enable_ht) {
+		if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
+			changed |= BSS_CHANGED_HT;
+
+		conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
+		ht_conf.ht_supported = 1;
+
+		ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
+		ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
+		ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
+
+		for (i = 0; i < SUPP_MCS_SET_LEN; i++)
+			ht_conf.supp_mcs_set[i] =
+					sband->ht_info.supp_mcs_set[i] &
+					req_ht_cap->supp_mcs_set[i];
+
+		ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
+		ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
+		ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
+
+		ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
+		ht_conf.ampdu_density = req_ht_cap->ampdu_density;
+
+		/* if bss configuration changed store the new one */
+		if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
+		    memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
+			changed |= BSS_CHANGED_HT;
+			memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
+			memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
+		}
+	} else {
+		if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
+			changed |= BSS_CHANGED_HT;
+		conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
+	}
+
+	return changed;
+}
+
+void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+				      u32 changed)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	if (!changed)
+		return;
+
+	if (local->ops->bss_info_changed)
+		local->ops->bss_info_changed(local_to_hw(local),
+					     &sdata->vif,
+					     &sdata->bss_conf,
+					     changed);
+}
+
+void ieee80211_reset_erp_info(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	sdata->bss_conf.use_cts_prot = 0;
+	sdata->bss_conf.use_short_preamble = 0;
+	ieee80211_bss_info_change_notify(sdata,
+					 BSS_CHANGED_ERP_CTS_PROT |
+					 BSS_CHANGED_ERP_PREAMBLE);
+}
+
+void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
+				 struct sk_buff *skb,
+				 struct ieee80211_tx_status *status)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_tx_status *saved;
+	int tmp;
+
+	skb->dev = local->mdev;
+	saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
+	if (unlikely(!saved)) {
+		if (net_ratelimit())
+			printk(KERN_WARNING "%s: Not enough memory, "
+			       "dropping tx status", skb->dev->name);
+		/* should be dev_kfree_skb_irq, but due to this function being
+		 * named _irqsafe instead of just _irq we can't be sure that
+		 * people won't call it from non-irq contexts */
+		dev_kfree_skb_any(skb);
+		return;
+	}
+	memcpy(saved, status, sizeof(struct ieee80211_tx_status));
+	/* copy pointer to saved status into skb->cb for use by tasklet */
+	memcpy(skb->cb, &saved, sizeof(saved));
+
+	skb->pkt_type = IEEE80211_TX_STATUS_MSG;
+	skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
+		       &local->skb_queue : &local->skb_queue_unreliable, skb);
+	tmp = skb_queue_len(&local->skb_queue) +
+		skb_queue_len(&local->skb_queue_unreliable);
+	while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
+	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+		memcpy(&saved, skb->cb, sizeof(saved));
+		kfree(saved);
+		dev_kfree_skb_irq(skb);
+		tmp--;
+		I802_DEBUG_INC(local->tx_status_drop);
+	}
+	tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
+
+static void ieee80211_tasklet_handler(unsigned long data)
+{
+	struct ieee80211_local *local = (struct ieee80211_local *) data;
+	struct sk_buff *skb;
+	struct ieee80211_rx_status rx_status;
+	struct ieee80211_tx_status *tx_status;
+	struct ieee80211_ra_tid *ra_tid;
+
+	while ((skb = skb_dequeue(&local->skb_queue)) ||
+	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+		switch (skb->pkt_type) {
+		case IEEE80211_RX_MSG:
+			/* status is in skb->cb */
+			memcpy(&rx_status, skb->cb, sizeof(rx_status));
+			/* Clear skb->pkt_type in order to not confuse kernel
+			 * netstack. */
+			skb->pkt_type = 0;
+			__ieee80211_rx(local_to_hw(local), skb, &rx_status);
+			break;
+		case IEEE80211_TX_STATUS_MSG:
+			/* get pointer to saved status out of skb->cb */
+			memcpy(&tx_status, skb->cb, sizeof(tx_status));
+			skb->pkt_type = 0;
+			ieee80211_tx_status(local_to_hw(local),
+					    skb, tx_status);
+			kfree(tx_status);
+			break;
+		case IEEE80211_DELBA_MSG:
+			ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
+			ieee80211_stop_tx_ba_cb(local_to_hw(local),
+						ra_tid->ra, ra_tid->tid);
+			dev_kfree_skb(skb);
+			break;
+		case IEEE80211_ADDBA_MSG:
+			ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
+			ieee80211_start_tx_ba_cb(local_to_hw(local),
+						 ra_tid->ra, ra_tid->tid);
+			dev_kfree_skb(skb);
+			break ;
+		default: /* should never get here! */
+			printk(KERN_ERR "%s: Unknown message type (%d)\n",
+			       wiphy_name(local->hw.wiphy), skb->pkt_type);
+			dev_kfree_skb(skb);
+			break;
+		}
+	}
+}
+
+/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
+ * make a prepared TX frame (one that has been given to hw) to look like brand
+ * new IEEE 802.11 frame that is ready to go through TX processing again.
+ * Also, tx_packet_data in cb is restored from tx_control. */
+static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
+				      struct ieee80211_key *key,
+				      struct sk_buff *skb,
+				      struct ieee80211_tx_control *control)
+{
+	int hdrlen, iv_len, mic_len;
+	struct ieee80211_tx_packet_data *pkt_data;
+
+	pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
+	pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
+	pkt_data->flags = 0;
+	if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
+		pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
+	if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
+		pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
+	if (control->flags & IEEE80211_TXCTL_REQUEUE)
+		pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
+	if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
+		pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
+	pkt_data->queue = control->queue;
+
+	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+
+	if (!key)
+		goto no_key;
+
+	switch (key->conf.alg) {
+	case ALG_WEP:
+		iv_len = WEP_IV_LEN;
+		mic_len = WEP_ICV_LEN;
+		break;
+	case ALG_TKIP:
+		iv_len = TKIP_IV_LEN;
+		mic_len = TKIP_ICV_LEN;
+		break;
+	case ALG_CCMP:
+		iv_len = CCMP_HDR_LEN;
+		mic_len = CCMP_MIC_LEN;
+		break;
+	default:
+		goto no_key;
+	}
+
+	if (skb->len >= mic_len &&
+	    !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
+		skb_trim(skb, skb->len - mic_len);
+	if (skb->len >= iv_len && skb->len > hdrlen) {
+		memmove(skb->data + iv_len, skb->data, hdrlen);
+		skb_pull(skb, iv_len);
+	}
+
+no_key:
+	{
+		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+		u16 fc = le16_to_cpu(hdr->frame_control);
+		if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
+			fc &= ~IEEE80211_STYPE_QOS_DATA;
+			hdr->frame_control = cpu_to_le16(fc);
+			memmove(skb->data + 2, skb->data, hdrlen - 2);
+			skb_pull(skb, 2);
+		}
+	}
+}
+
+static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
+					    struct sta_info *sta,
+					    struct sk_buff *skb,
+					    struct ieee80211_tx_status *status)
+{
+	sta->tx_filtered_count++;
+
+	/*
+	 * Clear the TX filter mask for this STA when sending the next
+	 * packet. If the STA went to power save mode, this will happen
+	 * happen when it wakes up for the next time.
+	 */
+	sta->flags |= WLAN_STA_CLEAR_PS_FILT;
+
+	/*
+	 * This code races in the following way:
+	 *
+	 *  (1) STA sends frame indicating it will go to sleep and does so
+	 *  (2) hardware/firmware adds STA to filter list, passes frame up
+	 *  (3) hardware/firmware processes TX fifo and suppresses a frame
+	 *  (4) we get TX status before having processed the frame and
+	 *	knowing that the STA has gone to sleep.
+	 *
+	 * This is actually quite unlikely even when both those events are
+	 * processed from interrupts coming in quickly after one another or
+	 * even at the same time because we queue both TX status events and
+	 * RX frames to be processed by a tasklet and process them in the
+	 * same order that they were received or TX status last. Hence, there
+	 * is no race as long as the frame RX is processed before the next TX
+	 * status, which drivers can ensure, see below.
+	 *
+	 * Note that this can only happen if the hardware or firmware can
+	 * actually add STAs to the filter list, if this is done by the
+	 * driver in response to set_tim() (which will only reduce the race
+	 * this whole filtering tries to solve, not completely solve it)
+	 * this situation cannot happen.
+	 *
+	 * To completely solve this race drivers need to make sure that they
+	 *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
+	 *	functions and
+	 *  (b) always process RX events before TX status events if ordering
+	 *      can be unknown, for example with different interrupt status
+	 *	bits.
+	 */
+	if (sta->flags & WLAN_STA_PS &&
+	    skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
+		ieee80211_remove_tx_extra(local, sta->key, skb,
+					  &status->control);
+		skb_queue_tail(&sta->tx_filtered, skb);
+		return;
+	}
+
+	if (!(sta->flags & WLAN_STA_PS) &&
+	    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
+		/* Software retry the packet once */
+		status->control.flags |= IEEE80211_TXCTL_REQUEUE;
+		ieee80211_remove_tx_extra(local, sta->key, skb,
+					  &status->control);
+		dev_queue_xmit(skb);
+		return;
+	}
+
+	if (net_ratelimit())
+		printk(KERN_DEBUG "%s: dropped TX filtered frame, "
+		       "queue_len=%d PS=%d @%lu\n",
+		       wiphy_name(local->hw.wiphy),
+		       skb_queue_len(&sta->tx_filtered),
+		       !!(sta->flags & WLAN_STA_PS), jiffies);
+	dev_kfree_skb(skb);
+}
+
+void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
+			 struct ieee80211_tx_status *status)
+{
+	struct sk_buff *skb2;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_local *local = hw_to_local(hw);
+	u16 frag, type;
+	struct ieee80211_tx_status_rtap_hdr *rthdr;
+	struct ieee80211_sub_if_data *sdata;
+	struct net_device *prev_dev = NULL;
+
+	if (!status) {
+		printk(KERN_ERR
+		       "%s: ieee80211_tx_status called with NULL status\n",
+		       wiphy_name(local->hw.wiphy));
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	rcu_read_lock();
+
+	if (status->excessive_retries) {
+		struct sta_info *sta;
+		sta = sta_info_get(local, hdr->addr1);
+		if (sta) {
+			if (sta->flags & WLAN_STA_PS) {
+				/*
+				 * The STA is in power save mode, so assume
+				 * that this TX packet failed because of that.
+				 */
+				status->excessive_retries = 0;
+				status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
+				ieee80211_handle_filtered_frame(local, sta,
+								skb, status);
+				rcu_read_unlock();
+				return;
+			}
+		}
+	}
+
+	if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
+		struct sta_info *sta;
+		sta = sta_info_get(local, hdr->addr1);
+		if (sta) {
+			ieee80211_handle_filtered_frame(local, sta, skb,
+							status);
+			rcu_read_unlock();
+			return;
+		}
+	} else
+		rate_control_tx_status(local->mdev, skb, status);
+
+	rcu_read_unlock();
+
+	ieee80211_led_tx(local, 0);
+
+	/* SNMP counters
+	 * Fragments are passed to low-level drivers as separate skbs, so these
+	 * are actually fragments, not frames. Update frame counters only for
+	 * the first fragment of the frame. */
+
+	frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
+	type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
+
+	if (status->flags & IEEE80211_TX_STATUS_ACK) {
+		if (frag == 0) {
+			local->dot11TransmittedFrameCount++;
+			if (is_multicast_ether_addr(hdr->addr1))
+				local->dot11MulticastTransmittedFrameCount++;
+			if (status->retry_count > 0)
+				local->dot11RetryCount++;
+			if (status->retry_count > 1)
+				local->dot11MultipleRetryCount++;
+		}
+
+		/* This counter shall be incremented for an acknowledged MPDU
+		 * with an individual address in the address 1 field or an MPDU
+		 * with a multicast address in the address 1 field of type Data
+		 * or Management. */
+		if (!is_multicast_ether_addr(hdr->addr1) ||
+		    type == IEEE80211_FTYPE_DATA ||
+		    type == IEEE80211_FTYPE_MGMT)
+			local->dot11TransmittedFragmentCount++;
+	} else {
+		if (frag == 0)
+			local->dot11FailedCount++;
+	}
+
+	/* this was a transmitted frame, but now we want to reuse it */
+	skb_orphan(skb);
+
+	/*
+	 * This is a bit racy but we can avoid a lot of work
+	 * with this test...
+	 */
+	if (!local->monitors && !local->cooked_mntrs) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	/* send frame to monitor interfaces now */
+
+	if (skb_headroom(skb) < sizeof(*rthdr)) {
+		printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	rthdr = (struct ieee80211_tx_status_rtap_hdr*)
+				skb_push(skb, sizeof(*rthdr));
+
+	memset(rthdr, 0, sizeof(*rthdr));
+	rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
+	rthdr->hdr.it_present =
+		cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
+			    (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
+
+	if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
+	    !is_multicast_ether_addr(hdr->addr1))
+		rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
+
+	if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
+	    (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
+		rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
+	else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
+		rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
+
+	rthdr->data_retries = status->retry_count;
+
+	/* XXX: is this sufficient for BPF? */
+	skb_set_mac_header(skb, 0);
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = htons(ETH_P_802_2);
+	memset(skb->cb, 0, sizeof(skb->cb));
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
+			if (!netif_running(sdata->dev))
+				continue;
+
+			if (prev_dev) {
+				skb2 = skb_clone(skb, GFP_ATOMIC);
+				if (skb2) {
+					skb2->dev = prev_dev;
+					netif_rx(skb2);
+				}
+			}
+
+			prev_dev = sdata->dev;
+		}
+	}
+	if (prev_dev) {
+		skb->dev = prev_dev;
+		netif_rx(skb);
+		skb = NULL;
+	}
+	rcu_read_unlock();
+	dev_kfree_skb(skb);
+}
+EXPORT_SYMBOL(ieee80211_tx_status);
+
+struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
+					const struct ieee80211_ops *ops)
+{
+	struct ieee80211_local *local;
+	int priv_size;
+	struct wiphy *wiphy;
+
+	/* Ensure 32-byte alignment of our private data and hw private data.
+	 * We use the wiphy priv data for both our ieee80211_local and for
+	 * the driver's private data
+	 *
+	 * In memory it'll be like this:
+	 *
+	 * +-------------------------+
+	 * | struct wiphy	    |
+	 * +-------------------------+
+	 * | struct ieee80211_local  |
+	 * +-------------------------+
+	 * | driver's private data   |
+	 * +-------------------------+
+	 *
+	 */
+	priv_size = ((sizeof(struct ieee80211_local) +
+		      NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
+		    priv_data_len;
+
+	wiphy = wiphy_new(&mac80211_config_ops, priv_size);
+
+	if (!wiphy)
+		return NULL;
+
+	wiphy->privid = mac80211_wiphy_privid;
+
+	local = wiphy_priv(wiphy);
+	local->hw.wiphy = wiphy;
+
+	local->hw.priv = (char *)local +
+			 ((sizeof(struct ieee80211_local) +
+			   NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
+
+	BUG_ON(!ops->tx);
+	BUG_ON(!ops->start);
+	BUG_ON(!ops->stop);
+	BUG_ON(!ops->config);
+	BUG_ON(!ops->add_interface);
+	BUG_ON(!ops->remove_interface);
+	BUG_ON(!ops->configure_filter);
+	local->ops = ops;
+
+	local->hw.queues = 1; /* default */
+
+	local->bridge_packets = 1;
+
+	local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
+	local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
+	local->short_retry_limit = 7;
+	local->long_retry_limit = 4;
+	local->hw.conf.radio_enabled = 1;
+
+	INIT_LIST_HEAD(&local->interfaces);
+
+	INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
+
+	sta_info_init(local);
+
+	tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
+		     (unsigned long)local);
+	tasklet_disable(&local->tx_pending_tasklet);
+
+	tasklet_init(&local->tasklet,
+		     ieee80211_tasklet_handler,
+		     (unsigned long) local);
+	tasklet_disable(&local->tasklet);
+
+	skb_queue_head_init(&local->skb_queue);
+	skb_queue_head_init(&local->skb_queue_unreliable);
+
+	return local_to_hw(local);
+}
+EXPORT_SYMBOL(ieee80211_alloc_hw);
+
+int ieee80211_register_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	const char *name;
+	int result;
+	enum ieee80211_band band;
+	struct net_device *mdev;
+	struct ieee80211_sub_if_data *sdata;
+
+	/*
+	 * generic code guarantees at least one band,
+	 * set this very early because much code assumes
+	 * that hw.conf.channel is assigned
+	 */
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		struct ieee80211_supported_band *sband;
+
+		sband = local->hw.wiphy->bands[band];
+		if (sband) {
+			/* init channel we're on */
+			local->hw.conf.channel =
+			local->oper_channel =
+			local->scan_channel = &sband->channels[0];
+			break;
+		}
+	}
+
+	result = wiphy_register(local->hw.wiphy);
+	if (result < 0)
+		return result;
+
+	/* for now, mdev needs sub_if_data :/ */
+	mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
+			    "wmaster%d", ether_setup);
+	if (!mdev)
+		goto fail_mdev_alloc;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
+	mdev->ieee80211_ptr = &sdata->wdev;
+	sdata->wdev.wiphy = local->hw.wiphy;
+
+	local->mdev = mdev;
+
+	ieee80211_rx_bss_list_init(mdev);
+
+	mdev->hard_start_xmit = ieee80211_master_start_xmit;
+	mdev->open = ieee80211_master_open;
+	mdev->stop = ieee80211_master_stop;
+	mdev->type = ARPHRD_IEEE80211;
+	mdev->header_ops = &ieee80211_header_ops;
+	mdev->set_multicast_list = ieee80211_master_set_multicast_list;
+
+	sdata->vif.type = IEEE80211_IF_TYPE_AP;
+	sdata->dev = mdev;
+	sdata->local = local;
+	sdata->u.ap.force_unicast_rateidx = -1;
+	sdata->u.ap.max_ratectrl_rateidx = -1;
+	ieee80211_if_sdata_init(sdata);
+
+	/* no RCU needed since we're still during init phase */
+	list_add_tail(&sdata->list, &local->interfaces);
+
+	name = wiphy_dev(local->hw.wiphy)->driver->name;
+	local->hw.workqueue = create_singlethread_workqueue(name);
+	if (!local->hw.workqueue) {
+		result = -ENOMEM;
+		goto fail_workqueue;
+	}
+
+	/*
+	 * The hardware needs headroom for sending the frame,
+	 * and we need some headroom for passing the frame to monitor
+	 * interfaces, but never both at the same time.
+	 */
+	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
+				   sizeof(struct ieee80211_tx_status_rtap_hdr));
+
+	debugfs_hw_add(local);
+
+	local->hw.conf.beacon_int = 1000;
+
+	local->wstats_flags |= local->hw.max_rssi ?
+			       IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
+	local->wstats_flags |= local->hw.max_signal ?
+			       IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
+	local->wstats_flags |= local->hw.max_noise ?
+			       IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
+	if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
+		local->wstats_flags |= IW_QUAL_DBM;
+
+	result = sta_info_start(local);
+	if (result < 0)
+		goto fail_sta_info;
+
+	rtnl_lock();
+	result = dev_alloc_name(local->mdev, local->mdev->name);
+	if (result < 0)
+		goto fail_dev;
+
+	memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
+	SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
+
+	result = register_netdevice(local->mdev);
+	if (result < 0)
+		goto fail_dev;
+
+	ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
+	ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
+
+	result = ieee80211_init_rate_ctrl_alg(local,
+					      hw->rate_control_algorithm);
+	if (result < 0) {
+		printk(KERN_DEBUG "%s: Failed to initialize rate control "
+		       "algorithm\n", wiphy_name(local->hw.wiphy));
+		goto fail_rate;
+	}
+
+	result = ieee80211_wep_init(local);
+
+	if (result < 0) {
+		printk(KERN_DEBUG "%s: Failed to initialize wep\n",
+		       wiphy_name(local->hw.wiphy));
+		goto fail_wep;
+	}
+
+	ieee80211_install_qdisc(local->mdev);
+
+	/* add one default STA interface */
+	result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
+				  IEEE80211_IF_TYPE_STA, NULL);
+	if (result)
+		printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
+		       wiphy_name(local->hw.wiphy));
+
+	local->reg_state = IEEE80211_DEV_REGISTERED;
+	rtnl_unlock();
+
+	ieee80211_led_init(local);
+
+	return 0;
+
+fail_wep:
+	rate_control_deinitialize(local);
+fail_rate:
+	ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
+	unregister_netdevice(local->mdev);
+fail_dev:
+	rtnl_unlock();
+	sta_info_stop(local);
+fail_sta_info:
+	debugfs_hw_del(local);
+	destroy_workqueue(local->hw.workqueue);
+fail_workqueue:
+	ieee80211_if_free(local->mdev);
+	local->mdev = NULL;
+fail_mdev_alloc:
+	wiphy_unregister(local->hw.wiphy);
+	return result;
+}
+EXPORT_SYMBOL(ieee80211_register_hw);
+
+void ieee80211_unregister_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata, *tmp;
+
+	tasklet_kill(&local->tx_pending_tasklet);
+	tasklet_kill(&local->tasklet);
+
+	rtnl_lock();
+
+	BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
+
+	local->reg_state = IEEE80211_DEV_UNREGISTERED;
+
+	/*
+	 * At this point, interface list manipulations are fine
+	 * because the driver cannot be handing us frames any
+	 * more and the tasklet is killed.
+	 */
+
+	/*
+	 * First, we remove all non-master interfaces. Do this because they
+	 * may have bss pointer dependency on the master, and when we free
+	 * the master these would be freed as well, breaking our list
+	 * iteration completely.
+	 */
+	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
+		if (sdata->dev == local->mdev)
+			continue;
+		list_del(&sdata->list);
+		__ieee80211_if_del(local, sdata);
+	}
+
+	/* then, finally, remove the master interface */
+	__ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
+
+	rtnl_unlock();
+
+	ieee80211_rx_bss_list_deinit(local->mdev);
+	ieee80211_clear_tx_pending(local);
+	sta_info_stop(local);
+	rate_control_deinitialize(local);
+	debugfs_hw_del(local);
+
+	if (skb_queue_len(&local->skb_queue)
+			|| skb_queue_len(&local->skb_queue_unreliable))
+		printk(KERN_WARNING "%s: skb_queue not empty\n",
+		       wiphy_name(local->hw.wiphy));
+	skb_queue_purge(&local->skb_queue);
+	skb_queue_purge(&local->skb_queue_unreliable);
+
+	destroy_workqueue(local->hw.workqueue);
+	wiphy_unregister(local->hw.wiphy);
+	ieee80211_wep_free(local);
+	ieee80211_led_exit(local);
+	ieee80211_if_free(local->mdev);
+	local->mdev = NULL;
+}
+EXPORT_SYMBOL(ieee80211_unregister_hw);
+
+void ieee80211_free_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	wiphy_free(local->hw.wiphy);
+}
+EXPORT_SYMBOL(ieee80211_free_hw);
+
+static int __init ieee80211_init(void)
+{
+	struct sk_buff *skb;
+	int ret;
+
+	BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
+
+	ret = rc80211_pid_init();
+	if (ret)
+		goto out;
+
+	ret = ieee80211_wme_register();
+	if (ret) {
+		printk(KERN_DEBUG "ieee80211_init: failed to "
+		       "initialize WME (err=%d)\n", ret);
+		goto out_cleanup_pid;
+	}
+
+	ieee80211_debugfs_netdev_init();
+
+	return 0;
+
+ out_cleanup_pid:
+	rc80211_pid_exit();
+ out:
+	return ret;
+}
+
+static void __exit ieee80211_exit(void)
+{
+	rc80211_pid_exit();
+
+	/*
+	 * For key todo, it'll be empty by now but the work
+	 * might still be scheduled.
+	 */
+	flush_scheduled_work();
+
+	if (mesh_allocated)
+		ieee80211s_stop();
+
+	ieee80211_wme_unregister();
+	ieee80211_debugfs_netdev_exit();
+}
+
+
+subsys_initcall(ieee80211_init);
+module_exit(ieee80211_exit);
+
+MODULE_DESCRIPTION("IEEE 802.11 subsystem");
+MODULE_LICENSE("GPL");