2 files changed, 25 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 6e823cc6a4b1..0a0c59365db6 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -782,6 +782,19 @@ enum sta_notify_cmd {
 };
 
 /**
+ * enum sta_notify_ps_cmd - sta power save notify command
+ *
+ * Used with the sta_notify_ps() callback in &struct ieee80211_ops to
+ * notify the driver if a station made a power state transition.
+ *
+ * @STA_NOTIFY_SLEEP: a station is now sleeping
+ * @STA_NOTIFY_AWAKE: a sleeping station woke up
+ */
+enum sta_notify_ps_cmd {
+        STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE,
+};
+
+/**
  * enum ieee80211_tkip_key_type - get tkip key
  *
  * Used by drivers which need to get a tkip key for skb. Some drivers need a
@@ -1251,6 +1264,9 @@ enum ieee80211_ampdu_mlme_action {
  * @sta_notify: Notifies low level driver about addition or removal
  *      of associated station or AP.
  *
+ * @sta_ps_notify: Notifies low level driver about the power state transition
+ *      of a associated station. Must be atomic.
+ *
  * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
  *      bursting) for a hardware TX queue.
  *
@@ -1317,6 +1333,8 @@ struct ieee80211_ops {
         int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
         void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                         enum sta_notify_cmd, struct ieee80211_sta *sta);
+        void (*sta_notify_ps)(struct ieee80211_hw *hw,
+                        enum sta_notify_ps_cmd, struct ieee80211_sta *sta);
         int (*conf_tx)(struct ieee80211_hw *hw, u16 queue,
                        const struct ieee80211_tx_queue_params *params);
         int (*get_tx_stats)(struct ieee80211_hw *hw,
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 68a6e973c72c..14be095b8528 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -654,9 +654,13 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
 static void ap_sta_ps_start(struct sta_info *sta)
 {
         struct ieee80211_sub_if_data *sdata = sta->sdata;
+        struct ieee80211_local *local = sdata->local;
 
         atomic_inc(&sdata->bss->num_sta_ps);
         set_and_clear_sta_flags(sta, WLAN_STA_PS, WLAN_STA_PSPOLL);
+        if (local->ops->sta_notify_ps)
+                local->ops->sta_notify_ps(local_to_hw(local), STA_NOTIFY_SLEEP,
+                                          &sta->sta);
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
         printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
                sdata->dev->name, sta->sta.addr, sta->sta.aid);
@@ -673,6 +677,9 @@ static int ap_sta_ps_end(struct sta_info *sta)
         atomic_dec(&sdata->bss->num_sta_ps);
 
         clear_sta_flags(sta, WLAN_STA_PS | WLAN_STA_PSPOLL);
+        if (local->ops->sta_notify_ps)
+                local->ops->sta_notify_ps(local_to_hw(local), STA_NOTIFY_AWAKE,
+                                          &sta->sta);
 
         if (!skb_queue_empty(&sta->ps_tx_buf))
                 sta_info_clear_tim_bit(sta);