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-rw-r--r--net/mac80211/cfg.c6
-rw-r--r--net/mac80211/ieee80211_sta.c1
-rw-r--r--net/mac80211/sta_info.c33
3 files changed, 20 insertions, 20 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index fbd462c..5f8db5c 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -700,11 +700,7 @@ static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
return -ENOENT;
sta_info_unlink(&sta);
-
- if (sta) {
- synchronize_rcu();
- sta_info_destroy(sta);
- }
+ sta_info_destroy(sta);
} else
sta_info_flush(local, sdata);
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 00fde11..c5a47f8 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -939,7 +939,6 @@ static void ieee80211_associated(struct net_device *dev,
rcu_read_unlock();
if (disassoc && sta) {
- synchronize_rcu();
rtnl_lock();
sta_info_destroy(sta);
rtnl_unlock();
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 5497ca1..dfca96e 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -180,13 +180,22 @@ void sta_info_destroy(struct sta_info *sta)
mesh_plink_deactivate(sta);
#endif
- /*
- * NOTE: This will call synchronize_rcu() internally to
- * make sure no key references can be in use. We rely on
- * that here for the mesh code!
- */
- ieee80211_key_free(sta->key);
- WARN_ON(sta->key);
+ if (sta->key) {
+ /*
+ * NOTE: This will call synchronize_rcu() internally to
+ * make sure no key references can be in use. We rely on
+ * that when we take this branch to make sure nobody can
+ * reference this STA struct any longer!
+ */
+ ieee80211_key_free(sta->key);
+ WARN_ON(sta->key);
+ } else {
+ /*
+ * Make sure that nobody can reference this STA struct
+ * any longer.
+ */
+ synchronize_rcu();
+ }
#ifdef CONFIG_MAC80211_MESH
if (ieee80211_vif_is_mesh(&sta->sdata->vif))
@@ -628,11 +637,9 @@ static void sta_info_debugfs_add_work(struct work_struct *work)
rate_control_add_sta_debugfs(sta);
sta = __sta_info_unpin(sta);
-
- if (sta) {
- synchronize_rcu();
- sta_info_destroy(sta);
- }
+ rtnl_lock();
+ sta_info_destroy(sta);
+ rtnl_unlock();
}
}
#endif
@@ -694,8 +701,6 @@ int sta_info_flush(struct ieee80211_local *local,
}
spin_unlock_irqrestore(&local->sta_lock, flags);
- synchronize_rcu();
-
list_for_each_entry_safe(sta, tmp, &tmp_list, list)
sta_info_destroy(sta);
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