The following commit has been merged in the master branch: commit b2367e46fa0d50fd784be3ec0a5c370bf2f2b61a Author: Sven Eckelmann sven@narfation.org Date: Fri Jul 15 17:39:28 2016 +0200

batman-adv: Place kref_get for hard_iface 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 caused by incorrect reference counting.

Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Marek Lindner mareklindner@neomailbox.ch Signed-off-by: Simon Wunderlich sw@simonwunderlich.de

diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 43c9a3e..9284c73 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -694,6 +694,7 @@ batadv_hardif_add_interface(struct net_device *net_dev) INIT_HLIST_HEAD(&hard_iface->neigh_list);

spin_lock_init(&hard_iface->neigh_list_lock); + kref_init(&hard_iface->refcount);

hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; if (batadv_is_wifi_netdev(net_dev)) @@ -701,11 +702,8 @@ batadv_hardif_add_interface(struct net_device *net_dev)

batadv_v_hardif_init(hard_iface);

- /* extra reference for return */ - kref_init(&hard_iface->refcount); - kref_get(&hard_iface->refcount); - batadv_check_known_mac_addr(hard_iface->net_dev); + kref_get(&hard_iface->refcount); list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list);

return hard_iface;