4 files changed, 63 insertions, 21 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index a6f1d8a869bc..fbcbed6cad01 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 7ecda9d59d8a..1619e0cd26e2 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 64ebe664effc..5fa7aedd90ed 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 deb4ecec122a..959aa8379ccf 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;