Adding upstream version 4.19.282.upstream/4.19.282

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 31 insertions, 58 deletions

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 71ebdc857..8efb2bf08 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -50,32 +50,24 @@ static void mesh_path_rht_free(void *ptr, void *tblptr)
 	mesh_path_free_rcu(tbl, mpath);
 }
 
-static struct mesh_table *mesh_table_alloc(void)
+static void mesh_table_init(struct mesh_table *tbl)
 {
-	struct mesh_table *newtbl;
+	INIT_HLIST_HEAD(&tbl->known_gates);
+	INIT_HLIST_HEAD(&tbl->walk_head);
+	atomic_set(&tbl->entries,  0);
+	spin_lock_init(&tbl->gates_lock);
+	spin_lock_init(&tbl->walk_lock);
 
-	newtbl = kmalloc(sizeof(struct mesh_table), GFP_ATOMIC);
-	if (!newtbl)
-		return NULL;
-
-	INIT_HLIST_HEAD(&newtbl->known_gates);
-	INIT_HLIST_HEAD(&newtbl->walk_head);
-	atomic_set(&newtbl->entries,  0);
-	spin_lock_init(&newtbl->gates_lock);
-	spin_lock_init(&newtbl->walk_lock);
-	if (rhashtable_init(&newtbl->rhead, &mesh_rht_params)) {
-		kfree(newtbl);
-		return NULL;
-	}
-
-	return newtbl;
+	/* rhashtable_init() may fail only in case of wrong
+	 * mesh_rht_params
+	 */
+	WARN_ON(rhashtable_init(&tbl->rhead, &mesh_rht_params));
 }
 
 static void mesh_table_free(struct mesh_table *tbl)
 {
 	rhashtable_free_and_destroy(&tbl->rhead,
 				    mesh_path_rht_free, tbl);
-	kfree(tbl);
 }
 
 /**
@@ -243,13 +235,13 @@ static struct mesh_path *mpath_lookup(struct mesh_table *tbl, const u8 *dst,
 struct mesh_path *
 mesh_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
 {
-	return mpath_lookup(sdata->u.mesh.mesh_paths, dst, sdata);
+	return mpath_lookup(&sdata->u.mesh.mesh_paths, dst, sdata);
 }
 
 struct mesh_path *
 mpp_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
 {
-	return mpath_lookup(sdata->u.mesh.mpp_paths, dst, sdata);
+	return mpath_lookup(&sdata->u.mesh.mpp_paths, dst, sdata);
 }
 
 static struct mesh_path *
@@ -286,7 +278,7 @@ __mesh_path_lookup_by_idx(struct mesh_table *tbl, int idx)
 struct mesh_path *
 mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
 {
-	return __mesh_path_lookup_by_idx(sdata->u.mesh.mesh_paths, idx);
+	return __mesh_path_lookup_by_idx(&sdata->u.mesh.mesh_paths, idx);
 }
 
 /**
@@ -301,7 +293,7 @@ mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
 struct mesh_path *
 mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
 {
-	return __mesh_path_lookup_by_idx(sdata->u.mesh.mpp_paths, idx);
+	return __mesh_path_lookup_by_idx(&sdata->u.mesh.mpp_paths, idx);
 }
 
 /**
@@ -314,7 +306,7 @@ int mesh_path_add_gate(struct mesh_path *mpath)
 	int err;
 
 	rcu_read_lock();
-	tbl = mpath->sdata->u.mesh.mesh_paths;
+	tbl = &mpath->sdata->u.mesh.mesh_paths;
 
 	spin_lock_bh(&mpath->state_lock);
 	if (mpath->is_gate) {
@@ -424,7 +416,7 @@ struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata,
 	if (!new_mpath)
 		return ERR_PTR(-ENOMEM);
 
-	tbl = sdata->u.mesh.mesh_paths;
+	tbl = &sdata->u.mesh.mesh_paths;
 	spin_lock_bh(&tbl->walk_lock);
 	do {
 		ret = rhashtable_lookup_insert_fast(&tbl->rhead,
@@ -473,7 +465,7 @@ int mpp_path_add(struct ieee80211_sub_if_data *sdata,
 		return -ENOMEM;
 
 	memcpy(new_mpath->mpp, mpp, ETH_ALEN);
-	tbl = sdata->u.mesh.mpp_paths;
+	tbl = &sdata->u.mesh.mpp_paths;
 
 	spin_lock_bh(&tbl->walk_lock);
 	ret = rhashtable_lookup_insert_fast(&tbl->rhead,
@@ -502,7 +494,7 @@ int mpp_path_add(struct ieee80211_sub_if_data *sdata,
 void mesh_plink_broken(struct sta_info *sta)
 {
 	struct ieee80211_sub_if_data *sdata = sta->sdata;
-	struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
+	struct mesh_table *tbl = &sdata->u.mesh.mesh_paths;
 	static const u8 bcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 	struct mesh_path *mpath;
 
@@ -561,7 +553,7 @@ static void __mesh_path_del(struct mesh_table *tbl, struct mesh_path *mpath)
 void mesh_path_flush_by_nexthop(struct sta_info *sta)
 {
 	struct ieee80211_sub_if_data *sdata = sta->sdata;
-	struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
+	struct mesh_table *tbl = &sdata->u.mesh.mesh_paths;
 	struct mesh_path *mpath;
 	struct hlist_node *n;
 
@@ -576,7 +568,7 @@ void mesh_path_flush_by_nexthop(struct sta_info *sta)
 static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
 			       const u8 *proxy)
 {
-	struct mesh_table *tbl = sdata->u.mesh.mpp_paths;
+	struct mesh_table *tbl = &sdata->u.mesh.mpp_paths;
 	struct mesh_path *mpath;
 	struct hlist_node *n;
 
@@ -610,8 +602,8 @@ static void table_flush_by_iface(struct mesh_table *tbl)
  */
 void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
 {
-	table_flush_by_iface(sdata->u.mesh.mesh_paths);
-	table_flush_by_iface(sdata->u.mesh.mpp_paths);
+	table_flush_by_iface(&sdata->u.mesh.mesh_paths);
+	table_flush_by_iface(&sdata->u.mesh.mpp_paths);
 }
 
 /**
@@ -657,7 +649,7 @@ int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
 	/* flush relevant mpp entries first */
 	mpp_flush_by_proxy(sdata, addr);
 
-	err = table_path_del(sdata->u.mesh.mesh_paths, sdata, addr);
+	err = table_path_del(&sdata->u.mesh.mesh_paths, sdata, addr);
 	sdata->u.mesh.mesh_paths_generation++;
 	return err;
 }
@@ -695,7 +687,7 @@ int mesh_path_send_to_gates(struct mesh_path *mpath)
 	struct mesh_path *gate;
 	bool copy = false;
 
-	tbl = sdata->u.mesh.mesh_paths;
+	tbl = &sdata->u.mesh.mesh_paths;
 
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) {
@@ -775,29 +767,10 @@ void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop)
 	mesh_path_tx_pending(mpath);
 }
 
-int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata)
+void mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata)
 {
-	struct mesh_table *tbl_path, *tbl_mpp;
-	int ret;
-
-	tbl_path = mesh_table_alloc();
-	if (!tbl_path)
-		return -ENOMEM;
-
-	tbl_mpp = mesh_table_alloc();
-	if (!tbl_mpp) {
-		ret = -ENOMEM;
-		goto free_path;
-	}
-
-	sdata->u.mesh.mesh_paths = tbl_path;
-	sdata->u.mesh.mpp_paths = tbl_mpp;
-
-	return 0;
-
-free_path:
-	mesh_table_free(tbl_path);
-	return ret;
+	mesh_table_init(&sdata->u.mesh.mesh_paths);
+	mesh_table_init(&sdata->u.mesh.mpp_paths);
 }
 
 static
@@ -819,12 +792,12 @@ void mesh_path_tbl_expire(struct ieee80211_sub_if_data *sdata,
 
 void mesh_path_expire(struct ieee80211_sub_if_data *sdata)
 {
-	mesh_path_tbl_expire(sdata, sdata->u.mesh.mesh_paths);
-	mesh_path_tbl_expire(sdata, sdata->u.mesh.mpp_paths);
+	mesh_path_tbl_expire(sdata, &sdata->u.mesh.mesh_paths);
+	mesh_path_tbl_expire(sdata, &sdata->u.mesh.mpp_paths);
 }
 
 void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata)
 {
-	mesh_table_free(sdata->u.mesh.mesh_paths);
-	mesh_table_free(sdata->u.mesh.mpp_paths);
+	mesh_table_free(&sdata->u.mesh.mesh_paths);
+	mesh_table_free(&sdata->u.mesh.mpp_paths);
 }