openwrt/package/madwifi/patches/451-ibss_race_fix.patch

--- a/net80211/ieee80211_input.c
+++ b/net80211/ieee80211_input.c
@@ -322,7 +322,6 @@ ieee80211_input(struct ieee80211vap * va
 			}
 			/* Do not try to find a node reference if the packet really did come from the BSS */
 			if (type == IEEE80211_FC0_TYPE_DATA && ni == vap->iv_bss &&
-					!IEEE80211_ADDR_EQ(vap->iv_bss->ni_macaddr, wh->i_addr2) &&
 					IEEE80211_ADDR_EQ(vap->iv_bssid, wh->i_addr3)) {
 				/* Try to find sender in local node table. */
 				ni = ieee80211_find_node(&ic->ic_sta, wh->i_addr2);
@@ -3572,10 +3571,12 @@ ieee80211_recv_mgmt(struct ieee80211vap 
 			} else if (vap->iv_opmode == IEEE80211_M_WDS) {
 				found = 1;
 				ni = ni_or_null = vap->iv_wdsnode;
-			} else if (vap->iv_opmode == IEEE80211_M_IBSS) {
+			} else if ((vap->iv_opmode == IEEE80211_M_IBSS) && (vap->iv_state == IEEE80211_S_RUN)) {
 				ni_or_null = ieee80211_find_node(&ic->ic_sta, wh->i_addr2);
-				if (ni_or_null)
+				if (ni_or_null) {
 					ni = ni_or_null;
+					do_unref = 1;
+				}
 				found = 1;
 			}
 			IEEE80211_UNLOCK_IRQ(vap->iv_ic);
--- a/net80211/ieee80211_node.c
+++ b/net80211/ieee80211_node.c
@@ -317,16 +317,16 @@ ieee80211_create_ibss(struct ieee80211va
 	/* Check to see if we already have a node for this mac
 	 * NB: we gain a node reference here
 	 */
-	ni = ieee80211_find_txnode(vap, vap->iv_myaddr);
+	ni = ieee80211_find_node(&ic->ic_sta, vap->iv_myaddr);
+	if (ni) {
+		ieee80211_node_leave(ni);
+		ieee80211_unref_node(&ni);
+	}
+
+	ni = ieee80211_alloc_node_table(vap, vap->iv_myaddr);
 	if (ni == NULL) {
-		ni = ieee80211_alloc_node_table(vap, vap->iv_myaddr);
-		IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
-				  "%s: ni:%p allocated for " MAC_FMT "\n",
-				  __func__, ni, MAC_ADDR(vap->iv_myaddr));
-		if (ni == NULL) {
-			/* XXX recovery? */
-			return;
-		}
+		/* XXX recovery? */
+		return;
 	}
 
 	IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
@@ -759,6 +759,9 @@ ieee80211_sta_join(struct ieee80211vap *
 	ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
 		IEEE80211_F_DOSORT | IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
 
+	if (vap->iv_opmode == IEEE80211_M_IBSS)
+		ieee80211_node_table_reset(&vap->iv_ic->ic_sta, vap);
+
 	return ieee80211_sta_join1(PASS_NODE(ni));
 }
 EXPORT_SYMBOL(ieee80211_sta_join);
--- a/ath/if_ath.c
+++ b/ath/if_ath.c
@@ -6655,10 +6655,8 @@ ath_recv_mgmt(struct ieee80211vap * vap,
 			 * if the difference it too small. Otherwise we are playing
 			 * tsf-pingpong with other vendors drivers */
 			beacon_tsf = le64_to_cpu(ni->ni_tstamp.tsf);
-			if (beacon_tsf > rtsf + 0xffff) {
+			if (beacon_tsf > rtsf + 0xffff)
 				ath_hal_settsf64(sc->sc_ah, beacon_tsf - rtsf);
-				ieee80211_ibss_merge(ni);
-			}
 			break;
 		}
 		/* NB: Fall Through */