---

yaml
---
r: 134121
b: refs/heads/master
c: a8302de
h: refs/heads/master
i:
  134119: d40e0c6
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 01f8162a854df7f9c259c839ad3c1168ac13b7b8
+refs/heads/master: a8302de934b5d1897ff146cd0c7ab87d1417c092

trunk/net/mac80211/ieee80211_i.h

@@ -715,6 +715,7 @@ struct ieee80211_local {
 	struct timer_list dynamic_ps_timer;
 
 	int user_power_level; /* in dBm */
+	int power_constr_level; /* in dBm */
 
 #ifdef CONFIG_MAC80211_DEBUGFS
 	struct local_debugfsdentries {
@@ -985,6 +986,9 @@ void ieee80211_chswitch_work(struct work_struct *work);
 void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 				  struct ieee80211_channel_sw_ie *sw_elem,
 				  struct ieee80211_bss *bss);
+void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
+				 u16 capab_info, u8 *pwr_constr_elem,
+				 u8 pwr_constr_elem_len);
 
 /* utility functions/constants */
 extern void *mac80211_wiphy_privid; /* for wiphy privid */

trunk/net/mac80211/main.c

@@ -214,10 +214,16 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 	}
 
-	if (!local->user_power_level)
+	if (local->sw_scanning)
 		power = chan->max_power;
 	else
-		power = min(chan->max_power, local->user_power_level);
+		power = local->power_constr_level ?
+			(chan->max_power - local->power_constr_level) :
+			chan->max_power;
+
+	if (local->user_power_level)
+		power = min(power, local->user_power_level);
+
 	if (local->hw.conf.power_level != power) {
 		changed |= IEEE80211_CONF_CHANGE_POWER;
 		local->hw.conf.power_level = power;

trunk/net/mac80211/mlme.c

@@ -905,6 +905,8 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	/* channel(_type) changes are handled by ieee80211_hw_config */
 	local->oper_channel_type = NL80211_CHAN_NO_HT;
 
+	local->power_constr_level = 0;
+
 	del_timer_sync(&local->dynamic_ps_timer);
 	cancel_work_sync(&local->dynamic_ps_enable_work);
 
@@ -1849,6 +1851,13 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 		 * for the BSSID we are associated to */
 		regulatory_hint_11d(local->hw.wiphy,
 			elems.country_elem, elems.country_elem_len);
+
+		/* TODO: IBSS also needs this */
+		if (elems.pwr_constr_elem)
+			ieee80211_handle_pwr_constr(sdata,
+				le16_to_cpu(mgmt->u.probe_resp.capab_info),
+				elems.pwr_constr_elem,
+				elems.pwr_constr_elem_len);
 	}
 
 	ieee80211_bss_info_change_notify(sdata, changed);

trunk/net/mac80211/spectmgmt.c

@@ -161,3 +161,24 @@ void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 			  jiffies + msecs_to_jiffies(sw_elem->count * bss->beacon_int));
 	}
 }
+
+void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
+				 u16 capab_info, u8 *pwr_constr_elem,
+				 u8 pwr_constr_elem_len)
+{
+	struct ieee80211_conf *conf = &sdata->local->hw.conf;
+
+	if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
+		return;
+
+	/* Power constraint IE length should be 1 octet */
+	if (pwr_constr_elem_len != 1)
+		return;
+
+	if ((*pwr_constr_elem <= conf->channel->max_power) &&
+	    (*pwr_constr_elem != sdata->local->power_constr_level)) {
+		sdata->local->power_constr_level = *pwr_constr_elem;
+		ieee80211_hw_config(sdata->local, 0);
+	}
+}
+