1 files changed, 27 insertions, 1 deletions

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index f2ba653b9d6..3370b262563 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -424,7 +424,7 @@ void sta_info_clear_tim_bit(struct sta_info *sta)
         spin_unlock_irqrestore(&sta->local->sta_lock, flags);
 }
 
-void __sta_info_unlink(struct sta_info **sta)
+static void __sta_info_unlink(struct sta_info **sta)
 {
         struct ieee80211_local *local = (*sta)->local;
         struct ieee80211_sub_if_data *sdata = (*sta)->sdata;
@@ -802,3 +802,29 @@ void sta_info_flush_delayed(struct ieee80211_sub_if_data *sdata)
                 schedule_work(&local->sta_flush_work);
         spin_unlock_irqrestore(&local->sta_lock, flags);
 }
+
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+                          unsigned long exp_time)
+{
+        struct ieee80211_local *local = sdata->local;
+        struct sta_info *sta, *tmp;
+        LIST_HEAD(tmp_list);
+        DECLARE_MAC_BUF(mac);
+        unsigned long flags;
+
+        spin_lock_irqsave(&local->sta_lock, flags);
+        list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
+                if (time_after(jiffies, sta->last_rx + exp_time)) {
+#ifdef CONFIG_MAC80211_IBSS_DEBUG
+                        printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
+                               sdata->dev->name, print_mac(mac, sta->addr));
+#endif
+                        __sta_info_unlink(&sta);
+                        if (sta)
+                                list_add(&sta->list, &tmp_list);
+                }
+        spin_unlock_irqrestore(&local->sta_lock, flags);
+
+        list_for_each_entry_safe(sta, tmp, &tmp_list, list)
+                sta_info_destroy(sta);
+}