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

Pull networking changes from David Miller:

 1) Get rid of the error prone NLA_PUT*() macros that used an embedded
    goto.

 2) Kill off the token-ring and MCA networking drivers, from Paul
    Gortmaker.

 3) Reduce high-order allocations made by datagram AF_UNIX sockets, from
    Eric Dumazet.

 4) Add PTP hardware clock support to IGB and IXGBE, from Richard
    Cochran and Jacob Keller.

 5) Allow users to query timestamping capabilities of a card via
    ethtool, from Richard Cochran.

 6) Add loadbalance mode to the teaming driver, from Jiri Pirko.  Part
    of this is that we can now have BPF filters not attached to sockets,
    and the loadbalancing function is calculated using one.

 7) Francois Romieu went through the network drivers removing gratuitous
    uses of netdev->base_addr, perhaps some day we can remove it
    completely but it's used for ISA probing still.

 8) Add a BPF JIT for sparc.  I know, who cares, right? :-)

 9) Move networking sysctl registry away from using the compatability
    mode interfaces in the sysctl code.  From Eric W Biederman.

10) Pavel Emelyanov added a way to save and restore TCP socket state via
    TCP_REPAIR, TCP_REPAIR_QUEUE, and TCP_QUEUE_SEQ socket options as
    well as a way to forcefully bind a socket to a port via the
    sk->sk_reuse value SK_FORCE_REUSE.  There is also a
    TCP_REPAIR_OPTIONS which allows to reinstante the TCP options
    enabled on the connection.

11) Several enhancements from Eric Dumazet that, in particular, can
    enhance splice performance on TCP sockets significantly.

     a) Reset the offset of the per-socket sendmsg page when we know
        we're the only use of the page in linear_to_page().

     b) Add facilities such that skb->data can be backed a page rather
        than SLAB kmalloc'd memory.  In particular devices which were
        receiving into linear RX buffers can now end up providing paged
        data.

    The big result is that code like splice and GRO do not have to copy
    any more.

12) Allow a pure sender to more gracefully handle ACK backlogs in TCP.
    What can happen at high rates is that the sender hasn't grown his
    receive buffer limits at all (he's not receiving data so really
    doesn't need to), but the non-data ACKs consume receive buffer
    space.

    sk_add_backlog() is too aggressive in dropping frames in this case,
    so relax it's requirements by using the receive buffer plus the send
    buffer limit as the backlog limit instead of just the former.

    Also from Eric Dumazet.

13) Add ipv6 support to L2TP, from Benjamin LaHaise, James Chapman, and
    Chris Elston.

14) Implement TCP early retransmit (RFC 5827), from Yuchung Cheng.
    Basically, we can start fast retransmit before hiting the dupack
    threshold under certain conditions.

15) New CODEL active queue management packet scheduler, from Eric
    Dumazet based upon initial work by Dave Taht.

    Basically, the big feature is that packets are dropped (or ECN bits
    are set) based upon how long packets live in the queue, rather than
    the queue length (which is what RED uses).

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1341 commits)
  drivers/net/stmmac: seq_file fix memory leak
  ipv6/exthdrs: strict Pad1 and PadN check
  USB: qmi_wwan: Add ZTE (Vodafone) K3520-Z
  USB: qmi_wwan: Add ZTE (Vodafone) K3765-Z
  USB: qmi_wwan: Make forced int 4 whitelist generic
  net/ipv4: replace simple_strtoul with kstrtoul
  net/ipv4/ipconfig: neaten __setup placement
  net: qmi_wwan: Add Vodafone/Huawei K5005 support
  net: cdc_ether: Add ZTE WWAN matches before generic Ethernet
  ipv6: use skb coalescing in reassembly
  ipv4: use skb coalescing in defragmentation
  net: introduce skb_try_coalesce()
  net:ipv6:fixed space issues relating to operators.
  net:ipv6:fixed a trailing white space issue.
  ipv6: disable GSO on sockets hitting dst_allfrag
  tg3: use netdev_alloc_frag() API
  net: napi_frags_skb() is static
  ppp: avoid false drop_monitor false positives
  ipv6: bool/const conversions phase2
  ipx: Remove spurious NULL checking in ipx_ioctl().
  ...

1 files changed, 200 insertions, 179 deletions

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 20c680bfc3a..b3b3c264ff6 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -171,122 +171,64 @@ static int ecw2cw(int ecw)
 	return (1 << ecw) - 1;
 }
 
-/*
- * ieee80211_enable_ht should be called only after the operating band
- * has been determined as ht configuration depends on the hw's
- * HT abilities for a specific band.
- */
-static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
-			       struct ieee80211_ht_info *hti,
-			       const u8 *bssid, u16 ap_ht_cap_flags,
-			       bool beacon_htcap_ie)
+static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_ht_operation *ht_oper,
+				  const u8 *bssid, bool reconfig)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	struct sta_info *sta;
 	u32 changed = 0;
-	int hti_cfreq;
 	u16 ht_opmode;
-	bool enable_ht = true;
-	enum nl80211_channel_type prev_chantype;
-	enum nl80211_channel_type rx_channel_type = NL80211_CHAN_NO_HT;
-	enum nl80211_channel_type tx_channel_type;
+	bool disable_40 = false;
 
 	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-	prev_chantype = sdata->vif.bss_conf.channel_type;
 
-
-	hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
-						   sband->band);
-	/* check that channel matches the right operating channel */
-	if (local->hw.conf.channel->center_freq != hti_cfreq) {
-		/* Some APs mess this up, evidently.
-		 * Netgear WNDR3700 sometimes reports 4 higher than
-		 * the actual channel, for instance.
-		 */
-		printk(KERN_DEBUG
-		       "%s: Wrong control channel in association"
-		       " response: configured center-freq: %d"
-		       " hti-cfreq: %d  hti->control_chan: %d"
-		       " band: %d.  Disabling HT.\n",
-		       sdata->name,
-		       local->hw.conf.channel->center_freq,
-		       hti_cfreq, hti->control_chan,
-		       sband->band);
-		enable_ht = false;
-	}
-
-	if (enable_ht) {
-		rx_channel_type = NL80211_CHAN_HT20;
-
-		if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
-		    !ieee80111_cfg_override_disables_ht40(sdata) &&
-		    (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
-		    (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
-			switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
-			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
-				rx_channel_type = NL80211_CHAN_HT40PLUS;
-				break;
-			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
-				rx_channel_type = NL80211_CHAN_HT40MINUS;
-				break;
-			}
-		}
+	switch (sdata->vif.bss_conf.channel_type) {
+	case NL80211_CHAN_HT40PLUS:
+		if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
+			disable_40 = true;
+		break;
+	case NL80211_CHAN_HT40MINUS:
+		if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
+			disable_40 = true;
+		break;
+	default:
+		break;
 	}
 
-	tx_channel_type = ieee80211_get_tx_channel_type(local, rx_channel_type);
+	/* This can change during the lifetime of the BSS */
+	if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
+		disable_40 = true;
 
-	if (local->tmp_channel)
-		local->tmp_channel_type = rx_channel_type;
-
-	if (!ieee80211_set_channel_type(local, sdata, rx_channel_type)) {
-		/* can only fail due to HT40+/- mismatch */
-		rx_channel_type = NL80211_CHAN_HT20;
-		WARN_ON(!ieee80211_set_channel_type(local, sdata,
-						    rx_channel_type));
-	}
-
-	if (beacon_htcap_ie && (prev_chantype != rx_channel_type)) {
-		/*
-		 * Whenever the AP announces the HT mode change that can be
-		 * 40MHz intolerant or etc., it would be safer to stop tx
-		 * queues before doing hw config to avoid buffer overflow.
-		 */
-		ieee80211_stop_queues_by_reason(&sdata->local->hw,
-				IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
+	mutex_lock(&local->sta_mtx);
+	sta = sta_info_get(sdata, bssid);
 
-		/* flush out all packets */
-		synchronize_net();
+	WARN_ON_ONCE(!sta);
 
-		drv_flush(local, false);
-	}
+	if (sta && !sta->supports_40mhz)
+		disable_40 = true;
 
-	/* channel_type change automatically detected */
-	ieee80211_hw_config(local, 0);
+	if (sta && (!reconfig ||
+		    (disable_40 != !(sta->sta.ht_cap.cap &
+					IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
 
-	if (prev_chantype != tx_channel_type) {
-		rcu_read_lock();
-		sta = sta_info_get(sdata, bssid);
-		if (sta)
-			rate_control_rate_update(local, sband, sta,
-						 IEEE80211_RC_HT_CHANGED,
-						 tx_channel_type);
-		rcu_read_unlock();
+		if (disable_40)
+			sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		else
+			sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 
-		if (beacon_htcap_ie)
-			ieee80211_wake_queues_by_reason(&sdata->local->hw,
-				IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
+		rate_control_rate_update(local, sband, sta,
+					 IEEE80211_RC_BW_CHANGED);
 	}
+	mutex_unlock(&local->sta_mtx);
 
-	ht_opmode = le16_to_cpu(hti->operation_mode);
+	ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 
 	/* if bss configuration changed store the new one */
-	if (sdata->ht_opmode_valid != enable_ht ||
-	    sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
-	    prev_chantype != rx_channel_type) {
+	if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
 		changed |= BSS_CHANGED_HT;
 		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
-		sdata->ht_opmode_valid = enable_ht;
 	}
 
 	return changed;
@@ -316,12 +258,12 @@ static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
 }
 
 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
-				struct sk_buff *skb, const u8 *ht_info_ie,
+				struct sk_buff *skb, const u8 *ht_oper_ie,
 				struct ieee80211_supported_band *sband,
 				struct ieee80211_channel *channel,
 				enum ieee80211_smps_mode smps)
 {
-	struct ieee80211_ht_info *ht_info;
+	struct ieee80211_ht_operation *ht_oper;
 	u8 *pos;
 	u32 flags = channel->flags;
 	u16 cap;
@@ -329,21 +271,21 @@ static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 
 	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 
-	if (!ht_info_ie)
+	if (!ht_oper_ie)
 		return;
 
-	if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
+	if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
 		return;
 
 	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 	ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 
-	ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
+	ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
 
 	/* determine capability flags */
 	cap = ht_cap.cap;
 
-	switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+	switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 		if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
@@ -358,6 +300,16 @@ static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 		break;
 	}
 
+	/*
+	 * If 40 MHz was disabled associate as though we weren't
+	 * capable of 40 MHz -- some broken APs will never fall
+	 * back to trying to transmit in 20 MHz.
+	 */
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
+		cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		cap &= ~IEEE80211_HT_CAP_SGI_40;
+	}
+
 	/* set SM PS mode properly */
 	cap &= ~IEEE80211_HT_CAP_SM_PS;
 	switch (smps) {
@@ -557,7 +509,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 	}
 
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
-		ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
+		ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
 				    sband, local->oper_channel, ifmgd->ap_smps);
 
 	/* if present, add any custom non-vendor IEs that go after HT */
@@ -1182,7 +1134,7 @@ static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 	if (!local->ops->conf_tx)
 		return;
 
-	if (local->hw.queues < 4)
+	if (local->hw.queues < IEEE80211_NUM_ACS)
 		return;
 
 	if (!wmm_param)
@@ -1435,7 +1387,6 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	sdata->vif.bss_conf.assoc = false;
 
 	/* on the next assoc, re-program HT parameters */
-	sdata->ht_opmode_valid = false;
 	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
 	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
 
@@ -1496,19 +1447,24 @@ void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
 
+	mutex_lock(&local->mtx);
 	if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
-			      IEEE80211_STA_CONNECTION_POLL)))
-	    return;
+			      IEEE80211_STA_CONNECTION_POLL))) {
+		mutex_unlock(&local->mtx);
+		return;
+	}
 
 	ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
 			  IEEE80211_STA_BEACON_POLL);
-	mutex_lock(&sdata->local->iflist_mtx);
-	ieee80211_recalc_ps(sdata->local, -1);
-	mutex_unlock(&sdata->local->iflist_mtx);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, -1);
+	mutex_unlock(&local->iflist_mtx);
 
 	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
-		return;
+		goto out;
 
 	/*
 	 * We've received a probe response, but are not sure whether
@@ -1520,6 +1476,9 @@ static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
 	mod_timer(&ifmgd->conn_mon_timer,
 		  round_jiffies_up(jiffies +
 				   IEEE80211_CONNECTION_IDLE_TIME));
+out:
+	ieee80211_run_deferred_scan(local);
+	mutex_unlock(&local->mtx);
 }
 
 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
@@ -1567,14 +1526,23 @@ static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
 		ifmgd->nullfunc_failed = false;
 		ieee80211_send_nullfunc(sdata->local, sdata, 0);
 	} else {
+		int ssid_len;
+
 		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
-		ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
-					 (u32) -1, true, false);
+		if (WARN_ON_ONCE(ssid == NULL))
+			ssid_len = 0;
+		else
+			ssid_len = ssid[1];
+
+		ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
+					 0, (u32) -1, true, false);
 	}
 
 	ifmgd->probe_send_count++;
 	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
 	run_again(ifmgd, ifmgd->probe_timeout);
+	if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		drv_flush(sdata->local, false);
 }
 
 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
@@ -1586,21 +1554,22 @@ static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
 	if (!ieee80211_sdata_running(sdata))
 		return;
 
-	if (sdata->local->scanning)
-		return;
-
-	if (sdata->local->tmp_channel)
-		return;
-
 	mutex_lock(&ifmgd->mtx);
 
 	if (!ifmgd->associated)
 		goto out;
 
+	mutex_lock(&sdata->local->mtx);
+
+	if (sdata->local->tmp_channel || sdata->local->scanning) {
+		mutex_unlock(&sdata->local->mtx);
+		goto out;
+	}
+
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
-	if (beacon && net_ratelimit())
-		printk(KERN_DEBUG "%s: detected beacon loss from AP "
-		       "- sending probe request\n", sdata->name);
+	if (beacon)
+		net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
+				    sdata->name);
 #endif
 
 	/*
@@ -1623,6 +1592,8 @@ static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
 	else
 		ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
 
+	mutex_unlock(&sdata->local->mtx);
+
 	if (already)
 		goto out;
 
@@ -1643,6 +1614,7 @@ struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	struct sk_buff *skb;
 	const u8 *ssid;
+	int ssid_len;
 
 	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 		return NULL;
@@ -1653,8 +1625,13 @@ struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
 		return NULL;
 
 	ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
+	if (WARN_ON_ONCE(ssid == NULL))
+		ssid_len = 0;
+	else
+		ssid_len = ssid[1];
+
 	skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
-					(u32) -1, ssid + 2, ssid[1],
+					(u32) -1, ssid + 2, ssid_len,
 					NULL, 0, true);
 
 	return skb;
@@ -1799,7 +1776,7 @@ ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
 
 	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
 
-	if (compare_ether_addr(bssid, mgmt->bssid))
+	if (!ether_addr_equal(bssid, mgmt->bssid))
 		return RX_MGMT_NONE;
 
 	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
@@ -1876,7 +1853,7 @@ ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
 		return RX_MGMT_NONE;
 
 	if (!ifmgd->associated ||
-	    compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
 		return RX_MGMT_NONE;
 
 	bssid = ifmgd->associated->bssid;
@@ -1909,7 +1886,7 @@ ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
 		return RX_MGMT_NONE;
 
 	if (!ifmgd->associated ||
-	    compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
 		return RX_MGMT_NONE;
 
 	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
@@ -2000,7 +1977,6 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 	u32 changed = 0;
 	int err;
-	u16 ap_ht_cap_flags;
 
 	/* AssocResp and ReassocResp have identical structure */
 
@@ -2051,7 +2027,8 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
 		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
 				elems.ht_cap_elem, &sta->sta.ht_cap);
 
-	ap_ht_cap_flags = sta->sta.ht_cap.cap;
+	sta->supports_40mhz =
+		sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 
 	rate_control_rate_init(sta);
 
@@ -2092,11 +2069,10 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
 		ieee80211_set_wmm_default(sdata, false);
 	changed |= BSS_CHANGED_QOS;
 
-	if (elems.ht_info_elem && elems.wmm_param &&
+	if (elems.ht_operation && elems.wmm_param &&
 	    !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
-		changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
-					       cbss->bssid, ap_ht_cap_flags,
-					       false);
+		changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
+						  cbss->bssid, false);
 
 	/* set AID and assoc capability,
 	 * ieee80211_set_associated() will tell the driver */
@@ -2137,7 +2113,7 @@ ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
 
 	if (!assoc_data)
 		return RX_MGMT_NONE;
-	if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
+	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
 		return RX_MGMT_NONE;
 
 	/*
@@ -2217,8 +2193,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 	bool need_ps = false;
 
 	if (sdata->u.mgd.associated &&
-	    compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
-	    == 0) {
+	    ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
 		bss = (void *)sdata->u.mgd.associated->priv;
 		/* not previously set so we may need to recalc */
 		need_ps = !bss->dtim_period;
@@ -2273,7 +2248,7 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
 
 	ASSERT_MGD_MTX(ifmgd);
 
-	if (compare_ether_addr(mgmt->da, sdata->vif.addr))
+	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
 		return; /* ignore ProbeResp to foreign address */
 
 	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
@@ -2286,12 +2261,11 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
 	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
 
 	if (ifmgd->associated &&
-	    compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
+	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
 		ieee80211_reset_ap_probe(sdata);
 
 	if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
-	    compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
-	    == 0) {
+	    ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
 		/* got probe response, continue with auth */
 		printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
 		ifmgd->auth_data->tries = 0;
@@ -2319,7 +2293,7 @@ static const u64 care_about_ies =
 	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
 	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
 	(1ULL << WLAN_EID_HT_CAPABILITY) |
-	(1ULL << WLAN_EID_HT_INFORMATION);
+	(1ULL << WLAN_EID_HT_OPERATION);
 
 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 				     struct ieee80211_mgmt *mgmt,
@@ -2348,8 +2322,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 		return;
 
 	if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
-	    compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
-	    == 0) {
+	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
 		ieee802_11_parse_elems(mgmt->u.beacon.variable,
 				       len - baselen, &elems);
 
@@ -2364,7 +2337,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (!ifmgd->associated ||
-	    compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
 		return;
 	bssid = ifmgd->associated->bssid;
 
@@ -2431,10 +2404,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 
 	if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
-		if (net_ratelimit()) {
-			printk(KERN_DEBUG "%s: cancelling probereq poll due "
-			       "to a received beacon\n", sdata->name);
-		}
+		net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
+				    sdata->name);
 #endif
 		ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
 		mutex_lock(&local->iflist_mtx);
@@ -2468,11 +2439,13 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
 		if (directed_tim) {
 			if (local->hw.conf.dynamic_ps_timeout > 0) {
-				local->hw.conf.flags &= ~IEEE80211_CONF_PS;
-				ieee80211_hw_config(local,
-						    IEEE80211_CONF_CHANGE_PS);
+				if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+					local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+					ieee80211_hw_config(local,
+							    IEEE80211_CONF_CHANGE_PS);
+				}
 				ieee80211_send_nullfunc(local, sdata, 0);
-			} else {
+			} else if (!local->pspolling && sdata->u.mgd.powersave) {
 				local->pspolling = true;
 
 				/*
@@ -2504,31 +2477,14 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 			erp_valid, erp_value);
 
 
-	if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
+	if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
 	    !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
-		struct sta_info *sta;
 		struct ieee80211_supported_band *sband;
-		u16 ap_ht_cap_flags;
-
-		rcu_read_lock();
-
-		sta = sta_info_get(sdata, bssid);
-		if (WARN_ON(!sta)) {
-			rcu_read_unlock();
-			return;
-		}
 
 		sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 
-		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
-				elems.ht_cap_elem, &sta->sta.ht_cap);
-
-		ap_ht_cap_flags = sta->sta.ht_cap.cap;
-
-		rcu_read_unlock();
-
-		changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
-					       bssid, ap_ht_cap_flags, true);
+		changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
+						  bssid, true);
 	}
 
 	/* Note: country IE parsing is done for us by cfg80211 */
@@ -3060,6 +3016,11 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
 	struct sta_info *sta;
 	bool have_sta = false;
 	int err;
+	int ht_cfreq;
+	enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
+	const u8 *ht_oper_ie;
+	const struct ieee80211_ht_operation *ht_oper = NULL;
+	struct ieee80211_supported_band *sband;
 
 	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
 		return -EINVAL;
@@ -3081,17 +3042,76 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
 	mutex_unlock(&local->mtx);
 
 	/* switch to the right channel */
+	sband = local->hw.wiphy->bands[cbss->channel->band];
+
+	ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
+
+	if (sband->ht_cap.ht_supported) {
+		ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
+					      cbss->information_elements,
+					      cbss->len_information_elements);
+		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
+			ht_oper = (void *)(ht_oper_ie + 2);
+	}
+
+	if (ht_oper) {
+		ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
+							  cbss->channel->band);
+		/* check that channel matches the right operating channel */
+		if (cbss->channel->center_freq != ht_cfreq) {
+			/*
+			 * It's possible that some APs are confused here;
+			 * Netgear WNDR3700 sometimes reports 4 higher than
+			 * the actual channel in association responses, but
+			 * since we look at probe response/beacon data here
+			 * it should be OK.
+			 */
+			printk(KERN_DEBUG
+			       "%s: Wrong control channel: center-freq: %d"
+			       " ht-cfreq: %d ht->primary_chan: %d"
+			       " band: %d. Disabling HT.\n",
+			       sdata->name, cbss->channel->center_freq,
+			       ht_cfreq, ht_oper->primary_chan,
+			       cbss->channel->band);
+			ht_oper = NULL;
+		}
+	}
+
+	if (ht_oper) {
+		channel_type = NL80211_CHAN_HT20;
+
+		if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
+			switch (ht_oper->ht_param &
+					IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+				channel_type = NL80211_CHAN_HT40PLUS;
+				break;
+			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+				channel_type = NL80211_CHAN_HT40MINUS;
+				break;
+			}
+		}
+	}
+
+	if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
+		/* can only fail due to HT40+/- mismatch */
+		channel_type = NL80211_CHAN_HT20;
+		printk(KERN_DEBUG
+		       "%s: disabling 40 MHz due to multi-vif mismatch\n",
+		       sdata->name);
+		ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
+		WARN_ON(!ieee80211_set_channel_type(local, sdata,
+						    channel_type));
+	}
+
 	local->oper_channel = cbss->channel;
-	ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+	ieee80211_hw_config(local, 0);
 
 	if (!have_sta) {
-		struct ieee80211_supported_band *sband;
 		u32 rates = 0, basic_rates = 0;
 		bool have_higher_than_11mbit;
 		int min_rate = INT_MAX, min_rate_index = -1;
 
-		sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
-
 		ieee80211_get_rates(sband, bss->supp_rates,
 				    bss->supp_rates_len,
 				    &rates, &basic_rates,
@@ -3141,7 +3161,7 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
 			return err;
 		}
 	} else
-		WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
+		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
 
 	return 0;
 }
@@ -3281,7 +3301,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 		bool match;
 
 		/* keep sta info, bssid if matching */
-		match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
+		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
 		ieee80211_destroy_auth_data(sdata, match);
 	}
 
@@ -3311,7 +3331,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 	/* Also disable HT if we don't support it or the AP doesn't use WMM */
 	sband = local->hw.wiphy->bands[req->bss->channel->band];
 	if (!sband->ht_cap.ht_supported ||
-	    local->hw.queues < 4 || !bss->wmm_used)
+	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
 		ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
 
 	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
@@ -3334,11 +3354,12 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 		ifmgd->ap_smps = ifmgd->req_smps;
 
 	assoc_data->capability = req->bss->capability;
-	assoc_data->wmm = bss->wmm_used && (local->hw.queues >= 4);
+	assoc_data->wmm = bss->wmm_used &&
+			  (local->hw.queues >= IEEE80211_NUM_ACS);
 	assoc_data->supp_rates = bss->supp_rates;
 	assoc_data->supp_rates_len = bss->supp_rates_len;
-	assoc_data->ht_information_ie =
-		ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
+	assoc_data->ht_operation_ie =
+		ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
 
 	if (bss->wmm_used && bss->uapsd_supported &&
 	    (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
@@ -3440,7 +3461,7 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 	       sdata->name, req->bssid, req->reason_code);
 
 	if (ifmgd->associated &&
-	    compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
+	    ether_addr_equal(ifmgd->associated->bssid, req->bssid))
 		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
 				       req->reason_code, true, frame_buf);
 	else