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 --- v2: - split patch based on type
net/batman-adv/hard-interface.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 714af8e..adb0377 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -658,6 +658,7 @@ 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)) @@ -665,11 +666,8 @@ 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;