Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6

15 files changed, 349 insertions, 80 deletions

diff --git a/net/ieee80211/ieee80211_wx.c b/net/ieee80211/ieee80211_wx.c
index 29eb41695a8..7cc4e5ee366 100644
--- a/net/ieee80211/ieee80211_wx.c
+++ b/net/ieee80211/ieee80211_wx.c
@@ -399,6 +399,10 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 
 	/* If a new key was provided, set it up */
 	if (erq->length > 0) {
+#ifdef CONFIG_IEEE80211_DEBUG
+		DECLARE_SSID_BUF(ssid);
+#endif
+
 		len = erq->length <= 5 ? 5 : 13;
 		memcpy(sec.keys[key], keybuf, erq->length);
 		if (len > erq->length)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 91f56a48e2b..16423f94801 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -26,6 +26,8 @@ static bool nl80211_type_check(enum nl80211_iftype type)
 #ifdef CONFIG_MAC80211_MESH
 	case NL80211_IFTYPE_MESH_POINT:
 #endif
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_AP_VLAN:
 	case NL80211_IFTYPE_WDS:
 		return true;
 	default:
@@ -1046,11 +1048,53 @@ static int ieee80211_change_bss(struct wiphy *wiphy,
 		changed |= BSS_CHANGED_ERP_SLOT;
 	}
 
+	if (params->basic_rates) {
+		int i, j;
+		u32 rates = 0;
+		struct ieee80211_local *local = wiphy_priv(wiphy);
+		struct ieee80211_supported_band *sband =
+			wiphy->bands[local->oper_channel->band];
+
+		for (i = 0; i < params->basic_rates_len; i++) {
+			int rate = (params->basic_rates[i] & 0x7f) * 5;
+			for (j = 0; j < sband->n_bitrates; j++) {
+				if (sband->bitrates[j].bitrate == rate)
+					rates |= BIT(j);
+			}
+		}
+		sdata->vif.bss_conf.basic_rates = rates;
+		changed |= BSS_CHANGED_BASIC_RATES;
+	}
+
 	ieee80211_bss_info_change_notify(sdata, changed);
 
 	return 0;
 }
 
+static int ieee80211_set_txq_params(struct wiphy *wiphy,
+				    struct ieee80211_txq_params *params)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_tx_queue_params p;
+
+	if (!local->ops->conf_tx)
+		return -EOPNOTSUPP;
+
+	memset(&p, 0, sizeof(p));
+	p.aifs = params->aifs;
+	p.cw_max = params->cwmax;
+	p.cw_min = params->cwmin;
+	p.txop = params->txop;
+	if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
+		printk(KERN_DEBUG "%s: failed to set TX queue "
+		       "parameters for queue %d\n", local->mdev->name,
+		       params->queue);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 struct cfg80211_ops mac80211_config_ops = {
 	.add_virtual_intf = ieee80211_add_iface,
 	.del_virtual_intf = ieee80211_del_iface,
@@ -1077,4 +1121,5 @@ struct cfg80211_ops mac80211_config_ops = {
 	.get_mesh_params = ieee80211_get_mesh_params,
 #endif
 	.change_bss = ieee80211_change_bss,
+	.set_txq_params = ieee80211_set_txq_params,
 };
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 08009d4b7d6..3e231d75677 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -987,7 +987,7 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
 {
 	struct ieee80211_hw *hw = &local->hw;
 	u16 capab;
-	u16 tid;
+	u16 tid, start_seq_num;
 	u8 *state;
 
 	capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
@@ -1024,6 +1024,14 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
 		    local->hw.ampdu_queues)
 			ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 
+		if (local->ops->ampdu_action) {
+			(void)local->ops->ampdu_action(hw,
+					       IEEE80211_AMPDU_TX_RESUME,
+					       &sta->sta, tid, &start_seq_num);
+		}
+#ifdef CONFIG_MAC80211_HT_DEBUG
+		printk(KERN_DEBUG "Resuming TX aggregation for tid %d\n", tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
 		spin_unlock_bh(&sta->lock);
 	} else {
 		sta->ampdu_mlme.addba_req_num[tid]++;
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 2c91108e390..155a2041001 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -212,9 +212,6 @@ struct ieee80211_if_ap {
 
 	struct list_head vlans;
 
-	u8 ssid[IEEE80211_MAX_SSID_LEN];
-	size_t ssid_len;
-
 	/* yes, this looks ugly, but guarantees that we can later use
 	 * bitmap_empty :)
 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index fa0cc7a1e6b..d631dc96c32 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -171,19 +171,13 @@ int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
 	conf.changed = changed;
 
 	if (sdata->vif.type == NL80211_IFTYPE_STATION ||
-	    sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+	    sdata->vif.type == NL80211_IFTYPE_ADHOC)
 		conf.bssid = sdata->u.sta.bssid;
-		conf.ssid = sdata->u.sta.ssid;
-		conf.ssid_len = sdata->u.sta.ssid_len;
-	} else if (sdata->vif.type == NL80211_IFTYPE_AP) {
+	else if (sdata->vif.type == NL80211_IFTYPE_AP)
 		conf.bssid = sdata->dev->dev_addr;
-		conf.ssid = sdata->u.ap.ssid;
-		conf.ssid_len = sdata->u.ap.ssid_len;
-	} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
+	else if (ieee80211_vif_is_mesh(&sdata->vif)) {
 		u8 zero[ETH_ALEN] = { 0 };
 		conf.bssid = zero;
-		conf.ssid = zero;
-		conf.ssid_len = 0;
 	} else {
 		WARN_ON(1);
 		return -EINVAL;
@@ -192,9 +186,6 @@ int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
 	if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
 		return -EINVAL;
 
-	if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
-		return -EINVAL;
-
 	return local->ops->config_interface(local_to_hw(local),
 					    &sdata->vif, &conf);
 }
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index d3b6e1a648b..82f568e9436 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -238,7 +238,7 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
 
 	pos = skb_put(skb, 21);
 	*pos++ = WLAN_EID_MESH_CONFIG;
-	*pos++ = MESH_CFG_LEN;
+	*pos++ = IEEE80211_MESH_CONFIG_LEN;
 	/* Version */
 	*pos++ = 1;
 
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index e10471c6ba4..c197ab545e5 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -145,9 +145,6 @@ struct mesh_rmc {
 };
 
 
-/* Mesh IEs constants */
-#define MESH_CFG_LEN		19
-
 /*
  * MESH_CFG_COMP_LEN Includes:
  * 	- Active path selection protocol ID.
@@ -157,7 +154,7 @@ struct mesh_rmc {
  * Does not include mesh capabilities, which may vary across nodes in the same
  * mesh
  */
-#define MESH_CFG_CMP_LEN 	17
+#define MESH_CFG_CMP_LEN 	(IEEE80211_MESH_CONFIG_LEN - 2)
 
 /* Default values, timeouts in ms */
 #define MESH_TTL 		5
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 29fafbe440b..dee6448c4eb 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1123,7 +1123,8 @@ static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
 	reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
 
 	if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
-		printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
+		printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
+				sdata->dev->name, reason_code);
 
 	if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
 	    ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
@@ -1154,7 +1155,8 @@ static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
 	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
 
 	if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
-		printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
+		printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
+				sdata->dev->name, reason_code);
 
 	if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
 		ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
@@ -1289,29 +1291,35 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
 
 	for (i = 0; i < elems.supp_rates_len; i++) {
 		int rate = (elems.supp_rates[i] & 0x7f) * 5;
+		bool is_basic = !!(elems.supp_rates[i] & 0x80);
 
 		if (rate > 110)
 			have_higher_than_11mbit = true;
 
 		for (j = 0; j < sband->n_bitrates; j++) {
-			if (sband->bitrates[j].bitrate == rate)
+			if (sband->bitrates[j].bitrate == rate) {
 				rates |= BIT(j);
-			if (elems.supp_rates[i] & 0x80)
-				basic_rates |= BIT(j);
+				if (is_basic)
+					basic_rates |= BIT(j);
+				break;
+			}
 		}
 	}
 
 	for (i = 0; i < elems.ext_supp_rates_len; i++) {
 		int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
+		bool is_basic = !!(elems.supp_rates[i] & 0x80);
 
 		if (rate > 110)
 			have_higher_than_11mbit = true;
 
 		for (j = 0; j < sband->n_bitrates; j++) {
-			if (sband->bitrates[j].bitrate == rate)
+			if (sband->bitrates[j].bitrate == rate) {
 				rates |= BIT(j);
-			if (elems.ext_supp_rates[i] & 0x80)
-				basic_rates |= BIT(j);
+				if (is_basic)
+					basic_rates |= BIT(j);
+				break;
+			}
 		}
 	}
 
@@ -2414,7 +2422,6 @@ void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
 {
 	struct ieee80211_if_sta *ifsta;
-	int res;
 
 	if (len > IEEE80211_MAX_SSID_LEN)
 		return -EINVAL;
@@ -2426,19 +2433,6 @@ int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size
 		memcpy(ifsta->ssid, ssid, len);
 		ifsta->ssid_len = len;
 		ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
-
-		res = 0;
-		/*
-		 * Hack! MLME code needs to be cleaned up to have different
-		 * entry points for configuration and internal selection change
-		 */
-		if (netif_running(sdata->dev))
-			res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
-		if (res) {
-			printk(KERN_DEBUG "%s: Failed to config new SSID to "
-			       "the low-level driver\n", sdata->dev->name);
-			return res;
-		}
 	}
 
 	if (len)
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index c643e373fc5..2b3b490a607 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -225,7 +225,7 @@ minstrel_get_next_sample(struct minstrel_sta_info *mi)
 	return sample_ndx;
 }
 
-void
+static void
 minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
 		  void *priv_sta, struct ieee80211_tx_rate_control *txrc)
 {
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 7372d7abb8c..f5c7c337192 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -159,7 +159,7 @@ ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_i
 {
 	struct ieee80211_bss *bss;
 
-	if (mesh_config_len != MESH_CFG_LEN)
+	if (mesh_config_len != IEEE80211_MESH_CONFIG_LEN)
 		return NULL;
 
 	bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index d6392af9cd2..0d81b2cfd1a 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -698,7 +698,6 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
 	left = payload_len - per_fragm;
 	for (i = 0; i < num_fragm - 1; i++) {
 		struct ieee80211_hdr *fhdr;
-		struct ieee80211_tx_info *info;
 		size_t copylen;
 
 		if (left <= 0)
diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index 231cab57351..63f36e9d1af 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -407,13 +407,6 @@ static int ieee80211_ioctl_siwessid(struct net_device *dev,
 		return 0;
 	}
 
-	if (sdata->vif.type == NL80211_IFTYPE_AP) {
-		memcpy(sdata->u.ap.ssid, ssid, len);
-		memset(sdata->u.ap.ssid + len, 0,
-		       IEEE80211_MAX_SSID_LEN - len);
-		sdata->u.ap.ssid_len = len;
-		return ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
-	}
 	return -EOPNOTSUPP;
 }
 
@@ -437,15 +430,6 @@ static int ieee80211_ioctl_giwessid(struct net_device *dev,
 		return res;
 	}
 
-	if (sdata->vif.type == NL80211_IFTYPE_AP) {
-		len = sdata->u.ap.ssid_len;
-		if (len > IW_ESSID_MAX_SIZE)
-			len = IW_ESSID_MAX_SIZE;
-		memcpy(ssid, sdata->u.ap.ssid, len);
-		data->length = len;
-		data->flags = 1;
-		return 0;
-	}
 	return -EOPNOTSUPP;
 }
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 5e1d658a8b5..e3e1494e769 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -58,6 +58,7 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
 	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 				      .len = BUS_ID_SIZE-1 },
+	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 
 	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
@@ -95,6 +96,8 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
 	[NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 	[NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 	[NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
+	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
+					   .len = NL80211_MAX_SUPP_RATES },
 
 	[NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 
@@ -284,20 +287,76 @@ static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 	return -ENOBUFS;
 }
 
+static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
+	[NL80211_TXQ_ATTR_QUEUE]		= { .type = NLA_U8 },
+	[NL80211_TXQ_ATTR_TXOP]			= { .type = NLA_U16 },
+	[NL80211_TXQ_ATTR_CWMIN]		= { .type = NLA_U16 },
+	[NL80211_TXQ_ATTR_CWMAX]		= { .type = NLA_U16 },
+	[NL80211_TXQ_ATTR_AIFS]			= { .type = NLA_U8 },
+};
+
+static int parse_txq_params(struct nlattr *tb[],
+			    struct ieee80211_txq_params *txq_params)
+{
+	if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
+	    !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
+	    !tb[NL80211_TXQ_ATTR_AIFS])
+		return -EINVAL;
+
+	txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
+	txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
+	txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
+	txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
+	txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
+
+	return 0;
+}
+
 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 {
 	struct cfg80211_registered_device *rdev;
-	int result;
-
-	if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
-		return -EINVAL;
+	int result = 0, rem_txq_params = 0;
+	struct nlattr *nl_txq_params;
 
 	rdev = cfg80211_get_dev_from_info(info);
 	if (IS_ERR(rdev))
 		return PTR_ERR(rdev);
 
-	result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
+	if (info->attrs[NL80211_ATTR_WIPHY_NAME]) {
+		result = cfg80211_dev_rename(
+			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
+		if (result)
+			goto bad_res;
+	}
+
+	if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
+		struct ieee80211_txq_params txq_params;
+		struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
+
+		if (!rdev->ops->set_txq_params) {
+			result = -EOPNOTSUPP;
+			goto bad_res;
+		}
 
+		nla_for_each_nested(nl_txq_params,
+				    info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
+				    rem_txq_params) {
+			nla_parse(tb, NL80211_TXQ_ATTR_MAX,
+				  nla_data(nl_txq_params),
+				  nla_len(nl_txq_params),
+				  txq_params_policy);
+			result = parse_txq_params(tb, &txq_params);
+			if (result)
+				goto bad_res;
+
+			result = rdev->ops->set_txq_params(&rdev->wiphy,
+							   &txq_params);
+			if (result)
+				goto bad_res;
+		}
+	}
+
+bad_res:
 	cfg80211_put_dev(rdev);
 	return result;
 }
@@ -1613,6 +1672,12 @@ static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
 	if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
 		params.use_short_slot_time =
 		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
+	if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
+		params.basic_rates =
+			nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
+		params.basic_rates_len =
+			nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
+	}
 
 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 	if (err)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 9dff716d1b0..4c7e39d466c 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -42,16 +42,33 @@
 #include "core.h"
 #include "reg.h"
 
-/*
- * wiphy is set if this request's initiator is
- * REGDOM_SET_BY_COUNTRY_IE or _DRIVER
+/**
+ * struct regulatory_request - receipt of last regulatory request
+ *
+ * @wiphy: this is set if this request's initiator is
+ * 	%REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
+ * 	can be used by the wireless core to deal with conflicts
+ * 	and potentially inform users of which devices specifically
+ * 	cased the conflicts.
+ * @initiator: indicates who sent this request, could be any of
+ * 	of those set in reg_set_by, %REGDOM_SET_BY_*
+ * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
+ * 	regulatory domain. We have a few special codes:
+ * 	00 - World regulatory domain
+ * 	99 - built by driver but a specific alpha2 cannot be determined
+ * 	98 - result of an intersection between two regulatory domains
+ * @intersect: indicates whether the wireless core should intersect
+ * 	the requested regulatory domain with the presently set regulatory
+ * 	domain.
  */
 struct regulatory_request {
 	struct wiphy *wiphy;
 	enum reg_set_by initiator;
 	char alpha2[2];
+	bool intersect;
 };
 
+/* Receipt of information from last regulatory request */
 static struct regulatory_request *last_request;
 
 /* To trigger userspace events */
@@ -321,7 +338,7 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
 
 	freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
 
-	if (freq_range->max_bandwidth_khz > freq_diff)
+	if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff)
 		return false;
 
 	return true;
@@ -359,6 +376,143 @@ static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
 	return 0;
 }
 
+/* Helper for regdom_intersect(), this does the real
+ * mathematical intersection fun */
+static int reg_rules_intersect(
+	const struct ieee80211_reg_rule *rule1,
+	const struct ieee80211_reg_rule *rule2,
+	struct ieee80211_reg_rule *intersected_rule)
+{
+	const struct ieee80211_freq_range *freq_range1, *freq_range2;
+	struct ieee80211_freq_range *freq_range;
+	const struct ieee80211_power_rule *power_rule1, *power_rule2;
+	struct ieee80211_power_rule *power_rule;
+	u32 freq_diff;
+
+	freq_range1 = &rule1->freq_range;
+	freq_range2 = &rule2->freq_range;
+	freq_range = &intersected_rule->freq_range;
+
+	power_rule1 = &rule1->power_rule;
+	power_rule2 = &rule2->power_rule;
+	power_rule = &intersected_rule->power_rule;
+
+	freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
+		freq_range2->start_freq_khz);
+	freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
+		freq_range2->end_freq_khz);
+	freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
+		freq_range2->max_bandwidth_khz);
+
+	freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
+	if (freq_range->max_bandwidth_khz > freq_diff)
+		freq_range->max_bandwidth_khz = freq_diff;
+
+	power_rule->max_eirp = min(power_rule1->max_eirp,
+		power_rule2->max_eirp);
+	power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
+		power_rule2->max_antenna_gain);
+
+	intersected_rule->flags = (rule1->flags | rule2->flags);
+
+	if (!is_valid_reg_rule(intersected_rule))
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
+ * regdom_intersect - do the intersection between two regulatory domains
+ * @rd1: first regulatory domain
+ * @rd2: second regulatory domain
+ *
+ * Use this function to get the intersection between two regulatory domains.
+ * Once completed we will mark the alpha2 for the rd as intersected, "98",
+ * as no one single alpha2 can represent this regulatory domain.
+ *
+ * Returns a pointer to the regulatory domain structure which will hold the
+ * resulting intersection of rules between rd1 and rd2. We will
+ * kzalloc() this structure for you.
+ */
+static struct ieee80211_regdomain *regdom_intersect(
+	const struct ieee80211_regdomain *rd1,
+	const struct ieee80211_regdomain *rd2)
+{
+	int r, size_of_regd;
+	unsigned int x, y;
+	unsigned int num_rules = 0, rule_idx = 0;
+	const struct ieee80211_reg_rule *rule1, *rule2;
+	struct ieee80211_reg_rule *intersected_rule;
+	struct ieee80211_regdomain *rd;
+	/* This is just a dummy holder to help us count */
+	struct ieee80211_reg_rule irule;
+
+	/* Uses the stack temporarily for counter arithmetic */
+	intersected_rule = &irule;
+
+	memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
+
+	if (!rd1 || !rd2)
+		return NULL;
+
+	/* First we get a count of the rules we'll need, then we actually
+	 * build them. This is to so we can malloc() and free() a
+	 * regdomain once. The reason we use reg_rules_intersect() here
+	 * is it will return -EINVAL if the rule computed makes no sense.
+	 * All rules that do check out OK are valid. */
+
+	for (x = 0; x < rd1->n_reg_rules; x++) {
+		rule1 = &rd1->reg_rules[x];
+		for (y = 0; y < rd2->n_reg_rules; y++) {
+			rule2 = &rd2->reg_rules[y];
+			if (!reg_rules_intersect(rule1, rule2,
+					intersected_rule))
+				num_rules++;
+			memset(intersected_rule, 0,
+					sizeof(struct ieee80211_reg_rule));
+		}
+	}
+
+	if (!num_rules)
+		return NULL;
+
+	size_of_regd = sizeof(struct ieee80211_regdomain) +
+		((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
+
+	rd = kzalloc(size_of_regd, GFP_KERNEL);
+	if (!rd)
+		return NULL;
+
+	for (x = 0; x < rd1->n_reg_rules; x++) {
+		rule1 = &rd1->reg_rules[x];
+		for (y = 0; y < rd2->n_reg_rules; y++) {
+			rule2 = &rd2->reg_rules[y];
+			/* This time around instead of using the stack lets
+			 * write to the target rule directly saving ourselves
+			 * a memcpy() */
+			intersected_rule = &rd->reg_rules[rule_idx];
+			r = reg_rules_intersect(rule1, rule2,
+				intersected_rule);
+			/* No need to memset here the intersected rule here as
+			 * we're not using the stack anymore */
+			if (r)
+				continue;
+			rule_idx++;
+		}
+	}
+
+	if (rule_idx != num_rules) {
+		kfree(rd);
+		return NULL;
+	}
+
+	rd->n_reg_rules = num_rules;
+	rd->alpha2[0] = '9';
+	rd->alpha2[1] = '8';
+
+	return rd;
+}
+
 /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
  * want to just have the channel structure use these */
 static u32 map_regdom_flags(u32 rd_flags)
@@ -468,6 +622,10 @@ void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
 	}
 }
 
+/* Return value which can be used by ignore_request() to indicate
+ * it has been determined we should intersect two regulatory domains */
+#define REG_INTERSECT	1
+
 /* This has the logic which determines when a new request
  * should be ignored. */
 static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
@@ -517,14 +675,8 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
 			return -EALREADY;
 		return 0;
 	case REGDOM_SET_BY_USER:
-		/*
-		 * If the user wants to override the AP's hint, we may
-		 * need to follow both and use the intersection. For now,
-		 * reject any such attempt (but we don't support country
-		 * IEs right now anyway.)
-		 */
 		if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
-			return -EOPNOTSUPP;
+			return REG_INTERSECT;
 		return 0;
 	}
 
@@ -536,10 +688,14 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
 		      const char *alpha2)
 {
 	struct regulatory_request *request;
+	bool intersect = false;
 	int r = 0;
 
 	r = ignore_request(wiphy, set_by, alpha2);
-	if (r)
+
+	if (r == REG_INTERSECT)
+		intersect = true;
+	else if (r)
 		return r;
 
 	switch (set_by) {
@@ -556,6 +712,7 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
 		request->alpha2[1] = alpha2[1];
 		request->initiator = set_by;
 		request->wiphy = wiphy;
+		request->intersect = intersect;
 
 		kfree(last_request);
 		last_request = request;
@@ -638,7 +795,7 @@ static void print_regdomain(const struct ieee80211_regdomain *rd)
 	print_rd_rules(rd);
 }
 
-void print_regdomain_info(const struct ieee80211_regdomain *rd)
+static void print_regdomain_info(const struct ieee80211_regdomain *rd)
 {
 	printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
 		rd->alpha2[0], rd->alpha2[1]);
@@ -648,6 +805,7 @@ void print_regdomain_info(const struct ieee80211_regdomain *rd)
 /* Takes ownership of rd only if it doesn't fail */
 static int __set_regdom(const struct ieee80211_regdomain *rd)
 {
+	const struct ieee80211_regdomain *intersected_rd = NULL;
 	/* Some basic sanity checks first */
 
 	if (is_world_regdom(rd->alpha2)) {
@@ -697,6 +855,14 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
 		return -EOPNOTSUPP;
 	}
 
+	if (unlikely(last_request->intersect)) {
+		intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
+		if (!intersected_rd)
+			return -EINVAL;
+		kfree(rd);
+		rd = intersected_rd;
+	}
+
 	/* Tada! */
 	cfg80211_regdomain = rd;
 
diff --git a/net/wireless/util.c b/net/wireless/util.c
index f54424693a3..e76cc28b034 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -7,6 +7,25 @@
 #include <asm/bitops.h>
 #include "core.h"
 
+struct ieee80211_rate *
+ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
+			    u64 basic_rates, int bitrate)
+{
+	struct ieee80211_rate *result = &sband->bitrates[0];
+	int i;
+
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if (!(basic_rates & BIT(i)))
+			continue;
+		if (sband->bitrates[i].bitrate > bitrate)
+			continue;
+		result = &sband->bitrates[i];
+	}
+
+	return result;
+}
+EXPORT_SYMBOL(ieee80211_get_response_rate);
+
 int ieee80211_channel_to_frequency(int chan)
 {
 	if (chan < 14)