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

10 files changed, 343 insertions, 22 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 7e6781f8c57e..495831ee48f1 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -450,6 +450,180 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
 }
 
+static const char ieee80211_gstrings_sta_stats[][ETH_GSTRING_LEN] = {
+	"rx_packets", "rx_bytes", "wep_weak_iv_count",
+	"rx_duplicates", "rx_fragments", "rx_dropped",
+	"tx_packets", "tx_bytes", "tx_fragments",
+	"tx_filtered", "tx_retry_failed", "tx_retries",
+	"beacon_loss", "sta_state", "txrate", "rxrate", "signal",
+	"channel", "noise", "ch_time", "ch_time_busy",
+	"ch_time_ext_busy", "ch_time_rx", "ch_time_tx"
+};
+#define STA_STATS_LEN	ARRAY_SIZE(ieee80211_gstrings_sta_stats)
+
+static int ieee80211_get_et_sset_count(struct wiphy *wiphy,
+				       struct net_device *dev,
+				       int sset)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int rv = 0;
+
+	if (sset == ETH_SS_STATS)
+		rv += STA_STATS_LEN;
+
+	rv += drv_get_et_sset_count(sdata, sset);
+
+	if (rv == 0)
+		return -EOPNOTSUPP;
+	return rv;
+}
+
+static void ieee80211_get_et_stats(struct wiphy *wiphy,
+				   struct net_device *dev,
+				   struct ethtool_stats *stats,
+				   u64 *data)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct sta_info *sta;
+	struct ieee80211_local *local = sdata->local;
+	struct station_info sinfo;
+	struct survey_info survey;
+	int i, q;
+#define STA_STATS_SURVEY_LEN 7
+
+	memset(data, 0, sizeof(u64) * STA_STATS_LEN);
+
+#define ADD_STA_STATS(sta)				\
+	do {						\
+		data[i++] += sta->rx_packets;		\
+		data[i++] += sta->rx_bytes;		\
+		data[i++] += sta->wep_weak_iv_count;	\
+		data[i++] += sta->num_duplicates;	\
+		data[i++] += sta->rx_fragments;		\
+		data[i++] += sta->rx_dropped;		\
+							\
+		data[i++] += sta->tx_packets;		\
+		data[i++] += sta->tx_bytes;		\
+		data[i++] += sta->tx_fragments;		\
+		data[i++] += sta->tx_filtered_count;	\
+		data[i++] += sta->tx_retry_failed;	\
+		data[i++] += sta->tx_retry_count;	\
+		data[i++] += sta->beacon_loss_count;	\
+	} while (0)
+
+	/* For Managed stations, find the single station based on BSSID
+	 * and use that.  For interface types, iterate through all available
+	 * stations and add stats for any station that is assigned to this
+	 * network device.
+	 */
+
+	rcu_read_lock();
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+		sta = sta_info_get_bss(sdata, sdata->u.mgd.bssid);
+
+		if (!(sta && !WARN_ON(sta->sdata->dev != dev)))
+			goto do_survey;
+
+		i = 0;
+		ADD_STA_STATS(sta);
+
+		data[i++] = sta->sta_state;
+
+		sinfo.filled = 0;
+		sta_set_sinfo(sta, &sinfo);
+
+		if (sinfo.filled | STATION_INFO_TX_BITRATE)
+			data[i] = 100000 *
+				cfg80211_calculate_bitrate(&sinfo.txrate);
+		i++;
+		if (sinfo.filled | STATION_INFO_RX_BITRATE)
+			data[i] = 100000 *
+				cfg80211_calculate_bitrate(&sinfo.rxrate);
+		i++;
+
+		if (sinfo.filled | STATION_INFO_SIGNAL_AVG)
+			data[i] = (u8)sinfo.signal_avg;
+		i++;
+	} else {
+		list_for_each_entry_rcu(sta, &local->sta_list, list) {
+			/* Make sure this station belongs to the proper dev */
+			if (sta->sdata->dev != dev)
+				continue;
+
+			i = 0;
+			ADD_STA_STATS(sta);
+		}
+	}
+
+do_survey:
+	i = STA_STATS_LEN - STA_STATS_SURVEY_LEN;
+	/* Get survey stats for current channel */
+	q = 0;
+	while (true) {
+		survey.filled = 0;
+		if (drv_get_survey(local, q, &survey) != 0) {
+			survey.filled = 0;
+			break;
+		}
+
+		if (survey.channel &&
+		    (local->oper_channel->center_freq ==
+		     survey.channel->center_freq))
+			break;
+		q++;
+	}
+
+	if (survey.filled)
+		data[i++] = survey.channel->center_freq;
+	else
+		data[i++] = 0;
+	if (survey.filled & SURVEY_INFO_NOISE_DBM)
+		data[i++] = (u8)survey.noise;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME)
+		data[i++] = survey.channel_time;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
+		data[i++] = survey.channel_time_busy;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
+		data[i++] = survey.channel_time_ext_busy;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_RX)
+		data[i++] = survey.channel_time_rx;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_TX)
+		data[i++] = survey.channel_time_tx;
+	else
+		data[i++] = -1LL;
+
+	rcu_read_unlock();
+
+	if (WARN_ON(i != STA_STATS_LEN))
+		return;
+
+	drv_get_et_stats(sdata, stats, &(data[STA_STATS_LEN]));
+}
+
+static void ieee80211_get_et_strings(struct wiphy *wiphy,
+				     struct net_device *dev,
+				     u32 sset, u8 *data)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int sz_sta_stats = 0;
+
+	if (sset == ETH_SS_STATS) {
+		sz_sta_stats = sizeof(ieee80211_gstrings_sta_stats);
+		memcpy(data, *ieee80211_gstrings_sta_stats, sz_sta_stats);
+	}
+	drv_get_et_strings(sdata, sset, &(data[sz_sta_stats]));
+}
 
 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 				 int idx, u8 *mac, struct station_info *sinfo)
@@ -1364,6 +1538,11 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy,
 			return -ENOTSUPP;
 		conf->rssi_threshold = nconf->rssi_threshold;
 	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
+		conf->ht_opmode = nconf->ht_opmode;
+		sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
+	}
 	return 0;
 }
 
@@ -2794,4 +2973,7 @@ struct cfg80211_ops mac80211_config_ops = {
 #ifdef CONFIG_PM
 	.set_wakeup = ieee80211_set_wakeup,
 #endif
+	.get_et_sset_count = ieee80211_get_et_sset_count,
+	.get_et_stats = ieee80211_get_et_stats,
+	.get_et_strings = ieee80211_get_et_strings,
 };
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 4a0e559cb26b..6d33a0c743ab 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -35,6 +35,43 @@ static inline void drv_tx_frags(struct ieee80211_local *local,
 	local->ops->tx_frags(&local->hw, vif, sta, skbs);
 }
 
+static inline void drv_get_et_strings(struct ieee80211_sub_if_data *sdata,
+				      u32 sset, u8 *data)
+{
+	struct ieee80211_local *local = sdata->local;
+	if (local->ops->get_et_strings) {
+		trace_drv_get_et_strings(local, sset);
+		local->ops->get_et_strings(&local->hw, &sdata->vif, sset, data);
+		trace_drv_return_void(local);
+	}
+}
+
+static inline void drv_get_et_stats(struct ieee80211_sub_if_data *sdata,
+				    struct ethtool_stats *stats,
+				    u64 *data)
+{
+	struct ieee80211_local *local = sdata->local;
+	if (local->ops->get_et_stats) {
+		trace_drv_get_et_stats(local);
+		local->ops->get_et_stats(&local->hw, &sdata->vif, stats, data);
+		trace_drv_return_void(local);
+	}
+}
+
+static inline int drv_get_et_sset_count(struct ieee80211_sub_if_data *sdata,
+					int sset)
+{
+	struct ieee80211_local *local = sdata->local;
+	int rv = 0;
+	if (local->ops->get_et_sset_count) {
+		trace_drv_get_et_sset_count(local, sset);
+		rv = local->ops->get_et_sset_count(&local->hw, &sdata->vif,
+						   sset);
+		trace_drv_return_int(local, rv);
+	}
+	return rv;
+}
+
 static inline int drv_start(struct ieee80211_local *local)
 {
 	int ret;
diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h
index 7c0754bed61b..6de00b2c268c 100644
--- a/net/mac80211/driver-trace.h
+++ b/net/mac80211/driver-trace.h
@@ -161,6 +161,21 @@ DEFINE_EVENT(local_only_evt, drv_start,
 	TP_ARGS(local)
 );
 
+DEFINE_EVENT(local_u32_evt, drv_get_et_strings,
+	     TP_PROTO(struct ieee80211_local *local, u32 sset),
+	     TP_ARGS(local, sset)
+);
+
+DEFINE_EVENT(local_u32_evt, drv_get_et_sset_count,
+	     TP_PROTO(struct ieee80211_local *local, u32 sset),
+	     TP_ARGS(local, sset)
+);
+
+DEFINE_EVENT(local_only_evt, drv_get_et_stats,
+	     TP_PROTO(struct ieee80211_local *local),
+	     TP_ARGS(local)
+);
+
 DEFINE_EVENT(local_only_evt, drv_suspend,
 	TP_PROTO(struct ieee80211_local *local),
 	TP_ARGS(local)
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index d307d3b3e32a..ebafba61c2ff 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -164,7 +164,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
 						sband->ht_cap.cap);
 		pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap,
-						 chan, channel_type);
+						 chan, channel_type, 0);
 	}
 
 	if (local->hw.queues >= IEEE80211_NUM_ACS) {
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index fabee974bf6d..3f3cd50fff16 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1497,7 +1497,8 @@ u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 			      u16 cap);
 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 			       struct ieee80211_channel *channel,
-			       enum nl80211_channel_type channel_type);
+			       enum nl80211_channel_type channel_type,
+			       u16 prot_mode);
 
 /* internal work items */
 void ieee80211_work_init(struct ieee80211_local *local);
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 775627166e48..0675a2fec6a6 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -76,6 +76,7 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee80211_local *local = sdata->local;
 	u32 basic_rates = 0;
+	enum nl80211_channel_type sta_channel_type = NL80211_CHAN_NO_HT;
 
 	/*
 	 * As support for each feature is added, check for matching
@@ -102,10 +103,15 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
 	if (sdata->vif.bss_conf.basic_rates != basic_rates)
 		goto mismatch;
 
-	/* disallow peering with mismatched channel types for now */
+	if (ie->ht_operation)
+		sta_channel_type =
+			ieee80211_ht_oper_to_channel_type(ie->ht_operation);
+
+	/* Disallow HT40+/- mismatch */
 	if (ie->ht_operation &&
-	    (local->_oper_channel_type !=
-	     ieee80211_ht_oper_to_channel_type(ie->ht_operation)))
+	    local->_oper_channel_type > NL80211_CHAN_HT20 &&
+	    sta_channel_type > NL80211_CHAN_HT20 &&
+	    local->_oper_channel_type != sta_channel_type)
 		goto mismatch;
 
 	return true;
@@ -396,7 +402,8 @@ int mesh_add_ht_oper_ie(struct sk_buff *skb,
 		return -ENOMEM;
 
 	pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
-	ieee80211_ie_build_ht_oper(pos, ht_cap, channel, channel_type);
+	ieee80211_ie_build_ht_oper(pos, ht_cap, channel, channel_type,
+				   sdata->vif.bss_conf.ht_operation_mode);
 
 	return 0;
 }
@@ -588,12 +595,15 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
 	ieee80211_mesh_root_setup(ifmsh);
 	ieee80211_queue_work(&local->hw, &sdata->work);
+	sdata->vif.bss_conf.ht_operation_mode =
+				ifmsh->mshcfg.ht_opmode;
 	sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
 	sdata->vif.bss_conf.basic_rates =
 		ieee80211_mandatory_rates(sdata->local,
 					  sdata->local->hw.conf.channel->band);
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
 						BSS_CHANGED_BEACON_ENABLED |
+						BSS_CHANGED_HT |
 						BSS_CHANGED_BASIC_RATES |
 						BSS_CHANGED_BEACON_INT);
 }
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 1ff2a5c63e43..8cc8461b48a0 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -102,12 +102,70 @@ static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
 
 	set_sta_flag(sta, WLAN_STA_WME);
 
-	if (sta_info_insert(sta))
-		return NULL;
-
 	return sta;
 }
 
+/** mesh_set_ht_prot_mode - set correct HT protection mode
+ *
+ * Section 9.23.3.5 of IEEE 80211s standard describes the protection rules for
+ * HT mesh STA in a MBSS. Three HT protection modes are supported for now,
+ * non-HT mixed mode, 20MHz-protection and no-protection mode. non-HT mixed
+ * mode is selected if any non-HT peers are present in our MBSS.
+ * 20MHz-protection mode is selected if all peers in our 20/40MHz MBSS support
+ * HT and atleast one HT20 peer is present. Otherwise no-protection mode is
+ * selected.
+ */
+static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	u32 changed = 0;
+	u16 ht_opmode;
+	bool non_ht_sta = false, ht20_sta = false;
+
+	if (local->_oper_channel_type == NL80211_CHAN_NO_HT)
+		return 0;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sdata == sta->sdata &&
+		    sta->plink_state == NL80211_PLINK_ESTAB) {
+			switch (sta->ch_type) {
+			case NL80211_CHAN_NO_HT:
+				mpl_dbg("mesh_plink %pM: nonHT sta (%pM) is present",
+					sdata->vif.addr, sta->sta.addr);
+				non_ht_sta = true;
+				goto out;
+			case NL80211_CHAN_HT20:
+				mpl_dbg("mesh_plink %pM: HT20 sta (%pM) is present",
+					sdata->vif.addr, sta->sta.addr);
+				ht20_sta = true;
+			default:
+				break;
+			}
+		}
+	}
+out:
+	rcu_read_unlock();
+
+	if (non_ht_sta)
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
+	else if (ht20_sta && local->_oper_channel_type > NL80211_CHAN_HT20)
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
+	else
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
+
+	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
+		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
+		sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
+		changed = BSS_CHANGED_HT;
+		mpl_dbg("mesh_plink %pM: protection mode changed to %d",
+			sdata->vif.addr, ht_opmode);
+	}
+
+	return changed;
+}
+
 /**
  * __mesh_plink_deactivate - deactivate mesh peer link
  *
@@ -281,6 +339,7 @@ static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_supported_band *sband;
 	u32 rates, basic_rates = 0;
 	struct sta_info *sta;
+	bool insert = false;
 
 	sband = local->hw.wiphy->bands[band];
 	rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates);
@@ -290,6 +349,7 @@ static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata,
 		sta = mesh_plink_alloc(sdata, addr);
 		if (!sta)
 			return NULL;
+		insert = true;
 	}
 
 	spin_lock_bh(&sta->lock);
@@ -303,9 +363,21 @@ static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata,
 	else
 		memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap));
 
+	if (elems->ht_operation) {
+		if (!(elems->ht_operation->ht_param &
+		      IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
+			sta->sta.ht_cap.cap &=
+					    ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		sta->ch_type =
+			ieee80211_ht_oper_to_channel_type(elems->ht_operation);
+	}
+
 	rate_control_rate_init(sta);
 	spin_unlock_bh(&sta->lock);
 
+	if (insert && sta_info_insert(sta))
+		return NULL;
+
 	return sta;
 }
 
@@ -487,9 +559,10 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 	enum plink_event event;
 	enum ieee80211_self_protected_actioncode ftype;
 	size_t baselen;
-	bool deactivated, matches_local = true;
+	bool matches_local = true;
 	u8 ie_len;
 	u8 *baseaddr;
+	u32 changed = 0;
 	__le16 plid, llid, reason;
 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
 	static const char *mplstates[] = {
@@ -775,7 +848,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			sta->plink_state = NL80211_PLINK_ESTAB;
 			spin_unlock_bh(&sta->lock);
 			mesh_plink_inc_estab_count(sdata);
-			ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= BSS_CHANGED_BEACON;
 			mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
 				sta->sta.addr);
 			break;
@@ -810,7 +884,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			sta->plink_state = NL80211_PLINK_ESTAB;
 			spin_unlock_bh(&sta->lock);
 			mesh_plink_inc_estab_count(sdata);
-			ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= BSS_CHANGED_BEACON;
 			mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
 				sta->sta.addr);
 			mesh_plink_frame_tx(sdata,
@@ -828,13 +903,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		case CLS_ACPT:
 			reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
 			sta->reason = reason;
-			deactivated = __mesh_plink_deactivate(sta);
+			__mesh_plink_deactivate(sta);
 			sta->plink_state = NL80211_PLINK_HOLDING;
 			llid = sta->llid;
 			mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
 			spin_unlock_bh(&sta->lock);
-			if (deactivated)
-				ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= BSS_CHANGED_BEACON;
 			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
 					    sta->sta.addr, llid, plid, reason);
 			break;
@@ -881,4 +956,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 	}
 
 	rcu_read_unlock();
+
+	if (changed)
+		ieee80211_bss_info_change_notify(sdata, changed);
 }
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index b1c617fdabd6..52cd301245ae 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -210,7 +210,7 @@ static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
 		disable_40 = true;
 
 	if (sta && (!reconfig ||
-		    (disable_40 != !!(sta->sta.ht_cap.cap &
+		    (disable_40 != !(sta->sta.ht_cap.cap &
 					IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
 
 		if (disable_40)
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index e920b229fb8c..3bb24a121c95 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -362,6 +362,7 @@ struct sta_info {
 	struct timer_list plink_timer;
 	s64 t_offset;
 	s64 t_offset_setpoint;
+	enum nl80211_channel_type ch_type;
 #endif
 
 #ifdef CONFIG_MAC80211_DEBUGFS
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index d9a747d387f0..22f2216b397e 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1663,7 +1663,8 @@ u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 
 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 			       struct ieee80211_channel *channel,
-			       enum nl80211_channel_type channel_type)
+			       enum nl80211_channel_type channel_type,
+			       u16 prot_mode)
 {
 	struct ieee80211_ht_operation *ht_oper;
 	/* Build HT Information */
@@ -1689,11 +1690,7 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 	    channel_type != NL80211_CHAN_HT20)
 		ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
 
-	/*
-	 * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
-	 * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
-	 */
-	ht_oper->operation_mode = 0x0000;
+	ht_oper->operation_mode = cpu_to_le16(prot_mode);
 	ht_oper->stbc_param = 0x0000;
 
 	/* It seems that Basic MCS set and Supported MCS set