Repository : ssh://git@open-mesh.org/batman-adv
On branch : master
commit 67694d57f74cec85c106f3e8dacc550189b4fb33 Author: Sven Eckelmann sven@narfation.org Date: Fri Jul 15 17:39:29 2016 +0200
batman-adv: Place kref_get for softif_vlan near use
It is hard to understand why the refcnt is increased when it isn't done near the actual place the new reference is used. So using kref_get right before the place which requires the reference and in the same function helps to avoid accidental problems causedy incorrect reference counting.
Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Marek Lindner mareklindner@neomailbox.ch
67694d57f74cec85c106f3e8dacc550189b4fb33 net/batman-adv/soft-interface.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index e508bf5..49e16b6 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -594,6 +594,7 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) }
spin_lock_bh(&bat_priv->softif_vlan_list_lock); + kref_get(&vlan->refcount); hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
@@ -604,6 +605,9 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) bat_priv->soft_iface->dev_addr, vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK);
+ /* don't return reference to new softif_vlan */ + batadv_softif_vlan_put(vlan); + return 0; }