Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking changes from David Miller:

1) Allow to dump, monitor, and change the bridge multicast database
   using netlink.  From Cong Wang.

2) RFC 5961 TCP blind data injection attack mitigation, from Eric
   Dumazet.

3) Networking user namespace support from Eric W. Biederman.

4) tuntap/virtio-net multiqueue support by Jason Wang.

5) Support for checksum offload of encapsulated packets (basically,
   tunneled traffic can still be checksummed by HW).  From Joseph
   Gasparakis.

6) Allow BPF filter access to VLAN tags, from Eric Dumazet and
   Daniel Borkmann.

7) Bridge port parameters over netlink and BPDU blocking support
   from Stephen Hemminger.

8) Improve data access patterns during inet socket demux by rearranging
   socket layout, from Eric Dumazet.

9) TIPC protocol updates and cleanups from Ying Xue, Paul Gortmaker, and
   Jon Maloy.

10) Update TCP socket hash sizing to be more in line with current day
    realities.  The existing heurstics were choosen a decade ago.
    From Eric Dumazet.

11) Fix races, queue bloat, and excessive wakeups in ATM and
    associated drivers, from Krzysztof Mazur and David Woodhouse.

12) Support DOVE (Distributed Overlay Virtual Ethernet) extensions
    in VXLAN driver, from David Stevens.

13) Add "oops_only" mode to netconsole, from Amerigo Wang.

14) Support set and query of VEB/VEPA bridge mode via PF_BRIDGE, also
    allow DCB netlink to work on namespaces other than the initial
    namespace.  From John Fastabend.

15) Support PTP in the Tigon3 driver, from Matt Carlson.

16) tun/vhost zero copy fixes and improvements, plus turn it on
    by default, from Michael S. Tsirkin.

17) Support per-association statistics in SCTP, from Michele
    Baldessari.

And many, many, driver updates, cleanups, and improvements.  Too
numerous to mention individually.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1722 commits)
  net/mlx4_en: Add support for destination MAC in steering rules
  net/mlx4_en: Use generic etherdevice.h functions.
  net: ethtool: Add destination MAC address to flow steering API
  bridge: add support of adding and deleting mdb entries
  bridge: notify mdb changes via netlink
  ndisc: Unexport ndisc_{build,send}_skb().
  uapi: add missing netconf.h to export list
  pkt_sched: avoid requeues if possible
  solos-pci: fix double-free of TX skb in DMA mode
  bnx2: Fix accidental reversions.
  bna: Driver Version Updated to 3.1.2.1
  bna: Firmware update
  bna: Add RX State
  bna: Rx Page Based Allocation
  bna: TX Intr Coalescing Fix
  bna: Tx and Rx Optimizations
  bna: Code Cleanup and Enhancements
  ath9k: check pdata variable before dereferencing it
  ath5k: RX timestamp is reported at end of frame
  ath9k_htc: RX timestamp is reported at end of frame
  ...

1 files changed, 174 insertions, 117 deletions

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index b858ebe41fda..e9eadc40c09c 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -324,22 +324,20 @@ static void purge_old_ps_buffers(struct ieee80211_local *local)
 	struct ieee80211_sub_if_data *sdata;
 	struct sta_info *sta;
 
-	/*
-	 * virtual interfaces are protected by RCU
-	 */
-	rcu_read_lock();
-
 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
-		struct ieee80211_if_ap *ap;
-		if (sdata->vif.type != NL80211_IFTYPE_AP)
+		struct ps_data *ps;
+
+		if (sdata->vif.type == NL80211_IFTYPE_AP)
+			ps = &sdata->u.ap.ps;
+		else
 			continue;
-		ap = &sdata->u.ap;
-		skb = skb_dequeue(&ap->ps_bc_buf);
+
+		skb = skb_dequeue(&ps->bc_buf);
 		if (skb) {
 			purged++;
 			dev_kfree_skb(skb);
 		}
-		total += skb_queue_len(&ap->ps_bc_buf);
+		total += skb_queue_len(&ps->bc_buf);
 	}
 
 	/*
@@ -360,8 +358,6 @@ static void purge_old_ps_buffers(struct ieee80211_local *local)
 		}
 	}
 
-	rcu_read_unlock();
-
 	local->total_ps_buffered = total;
 	ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
 }
@@ -371,6 +367,7 @@ ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
 {
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+	struct ps_data *ps;
 
 	/*
 	 * broadcast/multicast frame
@@ -380,16 +377,24 @@ ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
 	 * This is done either by the hardware or us.
 	 */
 
-	/* powersaving STAs only in AP/VLAN mode */
-	if (!tx->sdata->bss)
+	/* powersaving STAs currently only in AP/VLAN mode */
+	if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
+	    tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		if (!tx->sdata->bss)
+			return TX_CONTINUE;
+
+		ps = &tx->sdata->bss->ps;
+	} else {
 		return TX_CONTINUE;
+	}
+
 
 	/* no buffering for ordered frames */
 	if (ieee80211_has_order(hdr->frame_control))
 		return TX_CONTINUE;
 
 	/* no stations in PS mode */
-	if (!atomic_read(&tx->sdata->bss->num_sta_ps))
+	if (!atomic_read(&ps->num_sta_ps))
 		return TX_CONTINUE;
 
 	info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
@@ -404,14 +409,14 @@ ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
 	if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
 		purge_old_ps_buffers(tx->local);
 
-	if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) {
+	if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
 		ps_dbg(tx->sdata,
 		       "BC TX buffer full - dropping the oldest frame\n");
-		dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf));
+		dev_kfree_skb(skb_dequeue(&ps->bc_buf));
 	} else
 		tx->local->total_ps_buffered++;
 
-	skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb);
+	skb_queue_tail(&ps->bc_buf, tx->skb);
 
 	return TX_QUEUED;
 }
@@ -951,7 +956,6 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
 	fragnum = 0;
 
 	skb_queue_walk(&tx->skbs, skb) {
-		int next_len;
 		const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
 
 		hdr = (void *)skb->data;
@@ -970,7 +974,6 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
 			info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
 		} else {
 			hdr->frame_control &= ~morefrags;
-			next_len = 0;
 		}
 		hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
 		fragnum++;
@@ -1372,7 +1375,8 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
  * Returns false if the frame couldn't be transmitted but was queued instead.
  */
 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
-			 struct sk_buff *skb, bool txpending)
+			 struct sk_buff *skb, bool txpending,
+			 enum ieee80211_band band)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_tx_data tx;
@@ -1386,20 +1390,18 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
 		return true;
 	}
 
-	rcu_read_lock();
-
 	/* initialises tx */
 	led_len = skb->len;
 	res_prepare = ieee80211_tx_prepare(sdata, &tx, skb);
 
 	if (unlikely(res_prepare == TX_DROP)) {
 		ieee80211_free_txskb(&local->hw, skb);
-		goto out;
+		return true;
 	} else if (unlikely(res_prepare == TX_QUEUED)) {
-		goto out;
+		return true;
 	}
 
-	info->band = local->hw.conf.channel->band;
+	info->band = band;
 
 	/* set up hw_queue value early */
 	if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
@@ -1410,8 +1412,7 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
 	if (!invoke_tx_handlers(&tx))
 		result = __ieee80211_tx(local, &tx.skbs, led_len,
 					tx.sta, txpending);
- out:
-	rcu_read_unlock();
+
 	return result;
 }
 
@@ -1446,7 +1447,8 @@ static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
 	return 0;
 }
 
-void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
+void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
+		    enum ieee80211_band band)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -1454,8 +1456,6 @@ void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 	int headroom;
 	bool may_encrypt;
 
-	rcu_read_lock();
-
 	may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
 
 	headroom = local->tx_headroom;
@@ -1466,7 +1466,6 @@ void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 
 	if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
 		ieee80211_free_txskb(&local->hw, skb);
-		rcu_read_unlock();
 		return;
 	}
 
@@ -1478,13 +1477,11 @@ void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 	    !is_multicast_ether_addr(hdr->addr1) &&
 	    mesh_nexthop_resolve(skb, sdata)) {
 		/* skb queued: don't free */
-		rcu_read_unlock();
 		return;
 	}
 
 	ieee80211_set_qos_hdr(sdata, skb);
-	ieee80211_tx(sdata, skb, false);
-	rcu_read_unlock();
+	ieee80211_tx(sdata, skb, false, band);
 }
 
 static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb)
@@ -1574,7 +1571,8 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 					 struct net_device *dev)
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-	struct ieee80211_channel *chan = local->hw.conf.channel;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
 	struct ieee80211_radiotap_header *prthdr =
 		(struct ieee80211_radiotap_header *)skb->data;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -1583,26 +1581,6 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 	u16 len_rthdr;
 	int hdrlen;
 
-	/*
-	 * Frame injection is not allowed if beaconing is not allowed
-	 * or if we need radar detection. Beaconing is usually not allowed when
-	 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
-	 * Passive scan is also used in world regulatory domains where
-	 * your country is not known and as such it should be treated as
-	 * NO TX unless the channel is explicitly allowed in which case
-	 * your current regulatory domain would not have the passive scan
-	 * flag.
-	 *
-	 * Since AP mode uses monitor interfaces to inject/TX management
-	 * frames we can make AP mode the exception to this rule once it
-	 * supports radar detection as its implementation can deal with
-	 * radar detection by itself. We can do that later by adding a
-	 * monitor flag interfaces used for AP support.
-	 */
-	if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
-	     IEEE80211_CHAN_PASSIVE_SCAN)))
-		goto fail;
-
 	/* check for not even having the fixed radiotap header part */
 	if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
 		goto fail; /* too short to be possibly valid */
@@ -1688,11 +1666,45 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 		}
 	}
 
-	ieee80211_xmit(sdata, skb);
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!chanctx_conf) {
+		tmp_sdata = rcu_dereference(local->monitor_sdata);
+		if (tmp_sdata)
+			chanctx_conf =
+				rcu_dereference(tmp_sdata->vif.chanctx_conf);
+	}
+	if (!chanctx_conf)
+		goto fail_rcu;
+
+	chan = chanctx_conf->def.chan;
+
+	/*
+	 * Frame injection is not allowed if beaconing is not allowed
+	 * or if we need radar detection. Beaconing is usually not allowed when
+	 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
+	 * Passive scan is also used in world regulatory domains where
+	 * your country is not known and as such it should be treated as
+	 * NO TX unless the channel is explicitly allowed in which case
+	 * your current regulatory domain would not have the passive scan
+	 * flag.
+	 *
+	 * Since AP mode uses monitor interfaces to inject/TX management
+	 * frames we can make AP mode the exception to this rule once it
+	 * supports radar detection as its implementation can deal with
+	 * radar detection by itself. We can do that later by adding a
+	 * monitor flag interfaces used for AP support.
+	 */
+	if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
+			    IEEE80211_CHAN_PASSIVE_SCAN)))
+		goto fail_rcu;
+
+	ieee80211_xmit(sdata, skb, chan->band);
 	rcu_read_unlock();
 
 	return NETDEV_TX_OK;
 
+fail_rcu:
+	rcu_read_unlock();
 fail:
 	dev_kfree_skb(skb);
 	return NETDEV_TX_OK; /* meaning, we dealt with the skb */
@@ -1734,6 +1746,9 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 	bool multicast;
 	u32 info_flags = 0;
 	u16 info_id = 0;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_sub_if_data *ap_sdata;
+	enum ieee80211_band band;
 
 	if (unlikely(skb->len < ETH_HLEN))
 		goto fail;
@@ -1743,9 +1758,10 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 	ethertype = (skb->data[12] << 8) | skb->data[13];
 	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
 
+	rcu_read_lock();
+
 	switch (sdata->vif.type) {
 	case NL80211_IFTYPE_AP_VLAN:
-		rcu_read_lock();
 		sta = rcu_dereference(sdata->u.vlan.sta);
 		if (sta) {
 			fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
@@ -1758,7 +1774,12 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 			authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
 			wme_sta = test_sta_flag(sta, WLAN_STA_WME);
 		}
-		rcu_read_unlock();
+		ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
+					u.ap);
+		chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
 		if (sta)
 			break;
 		/* fall through */
@@ -1769,6 +1790,11 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
 		memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
 		hdrlen = 24;
+		if (sdata->vif.type == NL80211_IFTYPE_AP)
+			chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
 		break;
 	case NL80211_IFTYPE_WDS:
 		fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
@@ -1778,15 +1804,20 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		memcpy(hdr.addr3, skb->data, ETH_ALEN);
 		memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
 		hdrlen = 30;
+		/*
+		 * This is the exception! WDS style interfaces are prohibited
+		 * when channel contexts are in used so this must be valid
+		 */
+		band = local->hw.conf.channel->band;
 		break;
 #ifdef CONFIG_MAC80211_MESH
 	case NL80211_IFTYPE_MESH_POINT:
 		if (!sdata->u.mesh.mshcfg.dot11MeshTTL) {
 			/* Do not send frames with mesh_ttl == 0 */
 			sdata->u.mesh.mshstats.dropped_frames_ttl++;
-			goto fail;
+			goto fail_rcu;
 		}
-		rcu_read_lock();
+
 		if (!is_multicast_ether_addr(skb->data)) {
 			mpath = mesh_path_lookup(skb->data, sdata);
 			if (!mpath)
@@ -1803,7 +1834,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		    !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
 			hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
 					skb->data, skb->data + ETH_ALEN);
-			rcu_read_unlock();
 			meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr,
 					sdata, NULL, NULL);
 		} else {
@@ -1819,7 +1849,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 				mesh_da = mppath->mpp;
 			else if (mpath)
 				mesh_da = mpath->dst;
-			rcu_read_unlock();
 
 			hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
 					mesh_da, sdata->vif.addr);
@@ -1839,13 +1868,16 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 							skb->data + ETH_ALEN);
 
 		}
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
 		break;
 #endif
 	case NL80211_IFTYPE_STATION:
 		if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 			bool tdls_peer = false;
 
-			rcu_read_lock();
 			sta = sta_info_get(sdata, skb->data);
 			if (sta) {
 				authorized = test_sta_flag(sta,
@@ -1856,7 +1888,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 				tdls_auth = test_sta_flag(sta,
 						WLAN_STA_TDLS_PEER_AUTH);
 			}
-			rcu_read_unlock();
 
 			/*
 			 * If the TDLS link is enabled, send everything
@@ -1871,7 +1902,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		if (tdls_direct) {
 			/* link during setup - throw out frames to peer */
 			if (!tdls_auth)
-				goto fail;
+				goto fail_rcu;
 
 			/* DA SA BSSID */
 			memcpy(hdr.addr1, skb->data, ETH_ALEN);
@@ -1896,6 +1927,10 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 			memcpy(hdr.addr3, skb->data, ETH_ALEN);
 			hdrlen = 24;
 		}
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
 		break;
 	case NL80211_IFTYPE_ADHOC:
 		/* DA SA BSSID */
@@ -1903,9 +1938,13 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
 		memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
 		hdrlen = 24;
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
 		break;
 	default:
-		goto fail;
+		goto fail_rcu;
 	}
 
 	/*
@@ -1915,13 +1954,11 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 	 */
 	multicast = is_multicast_ether_addr(hdr.addr1);
 	if (!multicast) {
-		rcu_read_lock();
 		sta = sta_info_get(sdata, hdr.addr1);
 		if (sta) {
 			authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
 			wme_sta = test_sta_flag(sta, WLAN_STA_WME);
 		}
-		rcu_read_unlock();
 	}
 
 	/* For mesh, the use of the QoS header is mandatory */
@@ -1949,7 +1986,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 
 		I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
 
-		goto fail;
+		goto fail_rcu;
 	}
 
 	if (unlikely(!multicast && skb->sk &&
@@ -2004,7 +2041,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		kfree_skb(tmp_skb);
 
 		if (!skb)
-			goto fail;
+			goto fail_rcu;
 	}
 
 	hdr.frame_control = fc;
@@ -2052,7 +2089,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		head_need = max_t(int, 0, head_need);
 		if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
 			ieee80211_free_txskb(&local->hw, skb);
-			return NETDEV_TX_OK;
+			skb = NULL;
+			goto fail_rcu;
 		}
 	}
 
@@ -2104,10 +2142,13 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 	info->flags = info_flags;
 	info->ack_frame_id = info_id;
 
-	ieee80211_xmit(sdata, skb);
+	ieee80211_xmit(sdata, skb, band);
+	rcu_read_unlock();
 
 	return NETDEV_TX_OK;
 
+ fail_rcu:
+	rcu_read_unlock();
  fail:
 	dev_kfree_skb(skb);
 	return NETDEV_TX_OK;
@@ -2142,11 +2183,18 @@ static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
 	struct sta_info *sta;
 	struct ieee80211_hdr *hdr;
 	bool result;
+	struct ieee80211_chanctx_conf *chanctx_conf;
 
 	sdata = vif_to_sdata(info->control.vif);
 
 	if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
-		result = ieee80211_tx(sdata, skb, true);
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (unlikely(!chanctx_conf)) {
+			dev_kfree_skb(skb);
+			return true;
+		}
+		result = ieee80211_tx(sdata, skb, true,
+				      chanctx_conf->def.chan->band);
 	} else {
 		struct sk_buff_head skbs;
 
@@ -2214,9 +2262,8 @@ void ieee80211_tx_pending(unsigned long data)
 /* functions for drivers to get certain frames */
 
 static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
-				     struct ieee80211_if_ap *bss,
-				     struct sk_buff *skb,
-				     struct beacon_data *beacon)
+				     struct ps_data *ps,
+				     struct sk_buff *skb)
 {
 	u8 *pos, *tim;
 	int aid0 = 0;
@@ -2224,27 +2271,27 @@ static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
 
 	/* Generate bitmap for TIM only if there are any STAs in power save
 	 * mode. */
-	if (atomic_read(&bss->num_sta_ps) > 0)
+	if (atomic_read(&ps->num_sta_ps) > 0)
 		/* in the hope that this is faster than
 		 * checking byte-for-byte */
-		have_bits = !bitmap_empty((unsigned long*)bss->tim,
+		have_bits = !bitmap_empty((unsigned long*)ps->tim,
 					  IEEE80211_MAX_AID+1);
 
-	if (bss->dtim_count == 0)
-		bss->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
+	if (ps->dtim_count == 0)
+		ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
 	else
-		bss->dtim_count--;
+		ps->dtim_count--;
 
 	tim = pos = (u8 *) skb_put(skb, 6);
 	*pos++ = WLAN_EID_TIM;
 	*pos++ = 4;
-	*pos++ = bss->dtim_count;
+	*pos++ = ps->dtim_count;
 	*pos++ = sdata->vif.bss_conf.dtim_period;
 
-	if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf))
+	if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
 		aid0 = 1;
 
-	bss->dtim_bc_mc = aid0 == 1;
+	ps->dtim_bc_mc = aid0 == 1;
 
 	if (have_bits) {
 		/* Find largest even number N1 so that bits numbered 1 through
@@ -2252,14 +2299,14 @@ static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
 		 * (N2 + 1) x 8 through 2007 are 0. */
 		n1 = 0;
 		for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
-			if (bss->tim[i]) {
+			if (ps->tim[i]) {
 				n1 = i & 0xfe;
 				break;
 			}
 		}
 		n2 = n1;
 		for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
-			if (bss->tim[i]) {
+			if (ps->tim[i]) {
 				n2 = i;
 				break;
 			}
@@ -2269,7 +2316,7 @@ static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
 		*pos++ = n1 | aid0;
 		/* Part Virt Bitmap */
 		skb_put(skb, n2 - n1);
-		memcpy(pos, bss->tim + n1, n2 - n1 + 1);
+		memcpy(pos, ps->tim + n1, n2 - n1 + 1);
 
 		tim[1] = n2 - n1 + 4;
 	} else {
@@ -2286,16 +2333,16 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 	struct sk_buff *skb = NULL;
 	struct ieee80211_tx_info *info;
 	struct ieee80211_sub_if_data *sdata = NULL;
-	struct ieee80211_if_ap *ap = NULL;
-	struct beacon_data *beacon;
-	enum ieee80211_band band = local->oper_channel->band;
+	enum ieee80211_band band;
 	struct ieee80211_tx_rate_control txrc;
+	struct ieee80211_chanctx_conf *chanctx_conf;
 
 	rcu_read_lock();
 
 	sdata = vif_to_sdata(vif);
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 
-	if (!ieee80211_sdata_running(sdata))
+	if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
 		goto out;
 
 	if (tim_offset)
@@ -2304,8 +2351,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 		*tim_length = 0;
 
 	if (sdata->vif.type == NL80211_IFTYPE_AP) {
-		ap = &sdata->u.ap;
-		beacon = rcu_dereference(ap->beacon);
+		struct ieee80211_if_ap *ap = &sdata->u.ap;
+		struct beacon_data *beacon = rcu_dereference(ap->beacon);
+
 		if (beacon) {
 			/*
 			 * headroom, head length,
@@ -2329,14 +2377,12 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 			 * of the tim bitmap in mac80211 and the driver.
 			 */
 			if (local->tim_in_locked_section) {
-				ieee80211_beacon_add_tim(sdata, ap, skb,
-							 beacon);
+				ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
 			} else {
 				unsigned long flags;
 
 				spin_lock_irqsave(&local->tim_lock, flags);
-				ieee80211_beacon_add_tim(sdata, ap, skb,
-							 beacon);
+				ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
 				spin_unlock_irqrestore(&local->tim_lock, flags);
 			}
 
@@ -2412,6 +2458,8 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 		*pos++ = WLAN_EID_SSID;
 		*pos++ = 0x0;
 
+		band = chanctx_conf->def.chan->band;
+
 		if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
 		    mesh_add_ds_params_ie(skb, sdata) ||
 		    ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
@@ -2429,6 +2477,8 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 		goto out;
 	}
 
+	band = chanctx_conf->def.chan->band;
+
 	info = IEEE80211_SKB_CB(skb);
 
 	info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
@@ -2573,7 +2623,7 @@ EXPORT_SYMBOL(ieee80211_nullfunc_get);
 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
 				       struct ieee80211_vif *vif,
 				       const u8 *ssid, size_t ssid_len,
-				       const u8 *ie, size_t ie_len)
+				       size_t tailroom)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct ieee80211_local *local;
@@ -2587,7 +2637,7 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
 	ie_ssid_len = 2 + ssid_len;
 
 	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
-			    ie_ssid_len + ie_len);
+			    ie_ssid_len + tailroom);
 	if (!skb)
 		return NULL;
 
@@ -2608,11 +2658,6 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
 		memcpy(pos, ssid, ssid_len);
 	pos += ssid_len;
 
-	if (ie) {
-		pos = skb_put(skb, ie_len);
-		memcpy(pos, ie, ie_len);
-	}
-
 	return skb;
 }
 EXPORT_SYMBOL(ieee80211_probereq_get);
@@ -2656,29 +2701,40 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
 	struct sk_buff *skb = NULL;
 	struct ieee80211_tx_data tx;
 	struct ieee80211_sub_if_data *sdata;
-	struct ieee80211_if_ap *bss = NULL;
-	struct beacon_data *beacon;
+	struct ps_data *ps;
 	struct ieee80211_tx_info *info;
+	struct ieee80211_chanctx_conf *chanctx_conf;
 
 	sdata = vif_to_sdata(vif);
-	bss = &sdata->u.ap;
 
 	rcu_read_lock();
-	beacon = rcu_dereference(bss->beacon);
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+
+	if (!chanctx_conf)
+		goto out;
 
-	if (sdata->vif.type != NL80211_IFTYPE_AP || !beacon || !beacon->head)
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		struct beacon_data *beacon =
+				rcu_dereference(sdata->u.ap.beacon);
+
+		if (!beacon || !beacon->head)
+			goto out;
+
+		ps = &sdata->u.ap.ps;
+	} else {
 		goto out;
+	}
 
-	if (bss->dtim_count != 0 || !bss->dtim_bc_mc)
+	if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
 		goto out; /* send buffered bc/mc only after DTIM beacon */
 
 	while (1) {
-		skb = skb_dequeue(&bss->ps_bc_buf);
+		skb = skb_dequeue(&ps->bc_buf);
 		if (!skb)
 			goto out;
 		local->total_ps_buffered--;
 
-		if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) {
+		if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
 			struct ieee80211_hdr *hdr =
 				(struct ieee80211_hdr *) skb->data;
 			/* more buffered multicast/broadcast frames ==> set
@@ -2696,7 +2752,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
 	info = IEEE80211_SKB_CB(skb);
 
 	tx.flags |= IEEE80211_TX_PS_BUFFERED;
-	info->band = local->oper_channel->band;
+	info->band = chanctx_conf->def.chan->band;
 
 	if (invoke_tx_handlers(&tx))
 		skb = NULL;
@@ -2707,8 +2763,9 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
 }
 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
 
-void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
-			  struct sk_buff *skb, int tid)
+void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb, int tid,
+				 enum ieee80211_band band)
 {
 	int ac = ieee802_1d_to_ac[tid & 7];
 
@@ -2725,6 +2782,6 @@ void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
 	 * requirements are that we do not come into tx with bhs on.
 	 */
 	local_bh_disable();
-	ieee80211_xmit(sdata, skb);
+	ieee80211_xmit(sdata, skb, band);
 	local_bh_enable();
 }