From: Sven Eckelmann sven@narfation.org
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 --- net/batman-adv/tvlv.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/net/batman-adv/tvlv.c b/net/batman-adv/tvlv.c index 3533867..77654f0 100644 --- a/net/batman-adv/tvlv.c +++ b/net/batman-adv/tvlv.c @@ -547,8 +547,12 @@ void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, INIT_HLIST_NODE(&tvlv_handler->list);
spin_lock_bh(&bat_priv->tvlv.handler_list_lock); + kref_get(&tvlv_handler->refcount); hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list); spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); + + /* don't return reference to new tvlv_handler */ + batadv_tvlv_handler_put(tvlv_handler); }
/**