diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 1a14fab..63f4d31 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -73,6 +73,14 @@
 	WLAN_STA_4ADDR_EVENT,
 };
 
+enum ieee80211_sta_state {
+	/* NOTE: These need to be ordered correctly! */
+	IEEE80211_STA_NONE,
+	IEEE80211_STA_AUTH,
+	IEEE80211_STA_ASSOC,
+	IEEE80211_STA_AUTHORIZED,
+};
+
 #define STA_TID_NUM 16
 #define ADDBA_RESP_INTERVAL HZ
 #define HT_AGG_MAX_RETRIES		0x3
@@ -262,6 +270,7 @@
  * @dummy: indicate a dummy station created for receiving
  *	EAP frames before association
  * @sta: station information we share with the driver
+ * @sta_state: duplicates information about station state (for debug)
  */
 struct sta_info {
 	/* General information, mostly static */
@@ -283,6 +292,8 @@
 
 	bool uploaded;
 
+	enum ieee80211_sta_state sta_state;
+
 	/* use the accessors defined below */
 	unsigned long _flags;
 
@@ -371,12 +382,18 @@
 static inline void set_sta_flag(struct sta_info *sta,
 				enum ieee80211_sta_info_flags flag)
 {
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
 	set_bit(flag, &sta->_flags);
 }
 
 static inline void clear_sta_flag(struct sta_info *sta,
 				  enum ieee80211_sta_info_flags flag)
 {
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
 	clear_bit(flag, &sta->_flags);
 }
 
@@ -389,15 +406,32 @@
 static inline int test_and_clear_sta_flag(struct sta_info *sta,
 					  enum ieee80211_sta_info_flags flag)
 {
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
 	return test_and_clear_bit(flag, &sta->_flags);
 }
 
 static inline int test_and_set_sta_flag(struct sta_info *sta,
 					enum ieee80211_sta_info_flags flag)
 {
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
 	return test_and_set_bit(flag, &sta->_flags);
 }
 
+int sta_info_move_state_checked(struct sta_info *sta,
+				enum ieee80211_sta_state new_state);
+
+static inline void sta_info_move_state(struct sta_info *sta,
+				       enum ieee80211_sta_state new_state)
+{
+	int ret = sta_info_move_state_checked(sta, new_state);
+	WARN_ON_ONCE(ret);
+}
+
+
 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
 			     struct tid_ampdu_tx *tid_tx);
 
@@ -489,6 +523,9 @@
  */
 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 				u8 *addr, gfp_t gfp);
+
+void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
+
 /*
  * Insert STA info into hash table/list, returns zero or a
  * -EEXIST if (if the same MAC address is already present).