mac80211: Adds clean sdata helper

Adds hepler to clean sdata ieee80211_clean_sdata similar way as
ieee80211_setup_sdata is implemented. The function will be used by other
interfaces later.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/iface.c

@@ -1031,6 +1031,18 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 	ieee80211_debugfs_add_netdev(sdata);
 }
 
+static void ieee80211_clean_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_MESH_POINT:
+		mesh_path_flush_by_iface(sdata);
+		break;
+
+	default:
+		break;
+	}
+}
+
 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 					   enum nl80211_iftype type)
 {
@@ -1364,8 +1376,8 @@ void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
 	list_del_rcu(&sdata->list);
 	mutex_unlock(&sdata->local->iflist_mtx);
 
-	if (ieee80211_vif_is_mesh(&sdata->vif))
-		mesh_path_flush_by_iface(sdata);
+	/* clean up type-dependent data */
+	ieee80211_clean_sdata(sdata);
 
 	synchronize_rcu();
 	unregister_netdevice(sdata->dev);
@@ -1386,8 +1398,7 @@ void ieee80211_remove_interfaces(struct ieee80211_local *local)
 	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 		list_del(&sdata->list);
 
-		if (ieee80211_vif_is_mesh(&sdata->vif))
-			mesh_path_flush_by_iface(sdata);
+		ieee80211_clean_sdata(sdata);
 
 		unregister_netdevice_queue(sdata->dev, &unreg_list);
 	}

net/mac80211/mesh.h

@@ -304,7 +304,6 @@ void mesh_pathtbl_unregister(void);
 int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata);
 void mesh_path_timer(unsigned long data);
 void mesh_path_flush_by_nexthop(struct sta_info *sta);
-void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
 void mesh_path_discard_frame(struct sk_buff *skb,
 		struct ieee80211_sub_if_data *sdata);
 void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
@@ -345,6 +344,7 @@ void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
 void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
 void mesh_plink_quiesce(struct sta_info *sta);
 void mesh_plink_restart(struct sta_info *sta);
+void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
 void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
 #else
 #define mesh_allocated	0
@@ -358,6 +358,8 @@ static inline void mesh_plink_quiesce(struct sta_info *sta) {}
 static inline void mesh_plink_restart(struct sta_info *sta) {}
 static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
 { return false; }
+static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
+{}
 #endif
 
 #endif /* IEEE80211S_H */