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

7 files changed, 100 insertions, 31 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index a6f1d8a..fbcbed6 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -258,7 +258,7 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 			(chan->max_power - local->power_constr_level) :
 			chan->max_power;
 
-	if (local->user_power_level)
+	if (local->user_power_level >= 0)
 		power = min(power, local->user_power_level);
 
 	if (local->hw.conf.power_level != power) {
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 7ecda9d..1619e0c 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -441,6 +441,9 @@ static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
 	u8 index, indexn1, indexn2;
 	struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
 
+	if (unlikely(!tim || elems->tim_len < 4))
+		return false;
+
 	aid &= 0x3fff;
 	index = aid / 8;
 	mask  = 1 << (aid & 7);
@@ -945,9 +948,13 @@ void ieee80211_beacon_loss_work(struct work_struct *work)
 			     u.mgd.beacon_loss_work);
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
-	printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
-	       "- sending probe request\n", sdata->dev->name,
-	       sdata->u.mgd.bssid);
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+	if (net_ratelimit()) {
+		printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
+		       "- sending probe request\n", sdata->dev->name,
+		       sdata->u.mgd.bssid);
+	}
+#endif
 
 	ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
 	ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
@@ -1007,9 +1014,13 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
 	      (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
 	    time_after(jiffies,
 		       ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
-		printk(KERN_DEBUG "%s: beacon loss from AP %pM "
-		       "- sending probe request\n",
-		       sdata->dev->name, ifmgd->bssid);
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+		if (net_ratelimit()) {
+			printk(KERN_DEBUG "%s: beacon loss from AP %pM "
+			       "- sending probe request\n",
+			       sdata->dev->name, ifmgd->bssid);
+		}
+#endif
 		ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
 		ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
 					 ifmgd->ssid_len, NULL, 0);
@@ -2105,12 +2116,13 @@ void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
 	struct ieee80211_local *local =
 		container_of(work, struct ieee80211_local,
 			     dynamic_ps_enable_work);
+	/* XXX: using scan_sdata is completely broken! */
 	struct ieee80211_sub_if_data *sdata = local->scan_sdata;
 
 	if (local->hw.conf.flags & IEEE80211_CONF_PS)
 		return;
 
-	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
+	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && sdata)
 		ieee80211_send_nullfunc(local, sdata, 1);
 
 	local->hw.conf.flags |= IEEE80211_CONF_PS;
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 64ebe66..5fa7aed 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -29,6 +29,7 @@
 static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
 					   struct tid_ampdu_rx *tid_agg_rx,
 					   struct sk_buff *skb,
+					   struct ieee80211_rx_status *status,
 					   u16 mpdu_seq_num,
 					   int bar_req);
 /*
@@ -1688,7 +1689,7 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
 		/* manage reordering buffer according to requested */
 		/* sequence number */
 		rcu_read_lock();
-		ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL,
+		ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL, NULL,
 						 start_seq_num, 1);
 		rcu_read_unlock();
 		return RX_DROP_UNUSABLE;
@@ -2293,6 +2294,7 @@ static inline u16 seq_sub(u16 sq1, u16 sq2)
 static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
 					   struct tid_ampdu_rx *tid_agg_rx,
 					   struct sk_buff *skb,
+					   struct ieee80211_rx_status *rxstatus,
 					   u16 mpdu_seq_num,
 					   int bar_req)
 {
@@ -2374,6 +2376,8 @@ static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
 
 	/* put the frame in the reordering buffer */
 	tid_agg_rx->reorder_buf[index] = skb;
+	memcpy(tid_agg_rx->reorder_buf[index]->cb, rxstatus,
+	       sizeof(*rxstatus));
 	tid_agg_rx->stored_mpdu_num++;
 	/* release the buffer until next missing frame */
 	index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn)
@@ -2399,7 +2403,8 @@ static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
 }
 
 static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local,
-				     struct sk_buff *skb)
+				     struct sk_buff *skb,
+				     struct ieee80211_rx_status *status)
 {
 	struct ieee80211_hw *hw = &local->hw;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
@@ -2448,7 +2453,7 @@ static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local,
 
 	/* according to mpdu sequence number deal with reordering buffer */
 	mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
-	ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb,
+	ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, status,
 						mpdu_seq_num, 0);
  end_reorder:
 	return ret;
@@ -2512,7 +2517,7 @@ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
 		return;
 	}
 
-	if (!ieee80211_rx_reorder_ampdu(local, skb))
+	if (!ieee80211_rx_reorder_ampdu(local, skb, status))
 		__ieee80211_rx_handle_packet(hw, skb, status, rate);
 
 	rcu_read_unlock();
diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index deb4ece..959aa83 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -417,6 +417,7 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_channel* chan = local->hw.conf.channel;
+	bool reconf = false;
 	u32 reconf_flags = 0;
 	int new_power_level;
 
@@ -427,14 +428,38 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
 	if (!chan)
 		return -EINVAL;
 
-	if (data->txpower.fixed)
-		new_power_level = min(data->txpower.value, chan->max_power);
-	else /* Automatic power level setting */
-		new_power_level = chan->max_power;
+	/* only change when not disabling */
+	if (!data->txpower.disabled) {
+		if (data->txpower.fixed) {
+			if (data->txpower.value < 0)
+				return -EINVAL;
+			new_power_level = data->txpower.value;
+			/*
+			 * Debatable, but we cannot do a fixed power
+			 * level above the regulatory constraint.
+			 * Use "iwconfig wlan0 txpower 15dBm" instead.
+			 */
+			if (new_power_level > chan->max_power)
+				return -EINVAL;
+		} else {
+			/*
+			 * Automatic power level setting, max being the value
+			 * passed in from userland.
+			 */
+			if (data->txpower.value < 0)
+				new_power_level = -1;
+			else
+				new_power_level = data->txpower.value;
+		}
+
+		reconf = true;
 
-	local->user_power_level = new_power_level;
-	if (local->hw.conf.power_level != new_power_level)
-		reconf_flags |= IEEE80211_CONF_CHANGE_POWER;
+		/*
+		 * ieee80211_hw_config() will limit to the channel's
+		 * max power and possibly power constraint from AP.
+		 */
+		local->user_power_level = new_power_level;
+	}
 
 	if (local->hw.conf.radio_enabled != !(data->txpower.disabled)) {
 		local->hw.conf.radio_enabled = !(data->txpower.disabled);
@@ -442,7 +467,7 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
 		ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 	}
 
-	if (reconf_flags)
+	if (reconf || reconf_flags)
 		ieee80211_hw_config(local, reconf_flags);
 
 	return 0;
@@ -530,7 +555,7 @@ static int ieee80211_ioctl_giwfrag(struct net_device *dev,
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 
 	frag->value = local->fragmentation_threshold;
-	frag->disabled = (frag->value >= IEEE80211_MAX_RTS_THRESHOLD);
+	frag->disabled = (frag->value >= IEEE80211_MAX_FRAG_THRESHOLD);
 	frag->fixed = 1;
 
 	return 0;
diff --git a/net/wireless/core.h b/net/wireless/core.h
index d43daa2..0a592e4 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -90,7 +90,7 @@ struct cfg80211_internal_bss {
 	struct rb_node rbn;
 	unsigned long ts;
 	struct kref ref;
-	bool hold;
+	bool hold, ies_allocated;
 
 	/* must be last because of priv member */
 	struct cfg80211_bss pub;
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 6327e16..6c1993d 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2095,11 +2095,12 @@ int set_regdom(const struct ieee80211_regdomain *rd)
 /* Caller must hold cfg80211_mutex */
 void reg_device_remove(struct wiphy *wiphy)
 {
-	struct wiphy *request_wiphy;
+	struct wiphy *request_wiphy = NULL;
 
 	assert_cfg80211_lock();
 
-	request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
+	if (last_request)
+		request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
 
 	kfree(wiphy->regd);
 	if (!last_request || !request_wiphy)
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 2a00e36..2ae65b3 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -58,6 +58,10 @@ static void bss_release(struct kref *ref)
 	bss = container_of(ref, struct cfg80211_internal_bss, ref);
 	if (bss->pub.free_priv)
 		bss->pub.free_priv(&bss->pub);
+
+	if (bss->ies_allocated)
+		kfree(bss->pub.information_elements);
+
 	kfree(bss);
 }
 
@@ -360,19 +364,41 @@ cfg80211_bss_update(struct cfg80211_registered_device *dev,
 
 	found = rb_find_bss(dev, res);
 
-	if (found && overwrite) {
-		list_replace(&found->list, &res->list);
-		rb_replace_node(&found->rbn, &res->rbn,
-				&dev->bss_tree);
-		kref_put(&found->ref, bss_release);
-		found = res;
-	} else if (found) {
+	if (found) {
 		kref_get(&found->ref);
 		found->pub.beacon_interval = res->pub.beacon_interval;
 		found->pub.tsf = res->pub.tsf;
 		found->pub.signal = res->pub.signal;
 		found->pub.capability = res->pub.capability;
 		found->ts = res->ts;
+
+		/* overwrite IEs */
+		if (overwrite) {
+			size_t used = dev->wiphy.bss_priv_size + sizeof(*res);
+			size_t ielen = res->pub.len_information_elements;
+
+			if (ksize(found) >= used + ielen) {
+				memcpy(found->pub.information_elements,
+				       res->pub.information_elements, ielen);
+				found->pub.len_information_elements = ielen;
+			} else {
+				u8 *ies = found->pub.information_elements;
+
+				if (found->ies_allocated) {
+					if (ksize(ies) < ielen)
+						ies = krealloc(ies, ielen,
+							       GFP_ATOMIC);
+				} else
+					ies = kmalloc(ielen, GFP_ATOMIC);
+
+				if (ies) {
+					memcpy(ies, res->pub.information_elements, ielen);
+					found->ies_allocated = true;
+					found->pub.information_elements = ies;
+				}
+			}
+		}
+
 		kref_put(&res->ref, bss_release);
 	} else {
 		/* this "consumes" the reference */