From: Sven Eckelmann Date: Fri, 15 Jul 2016 15:39:30 +0000 (+0200) Subject: batman-adv: Place kref_get for nc_node near use X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=da7a26af4ae7192e63103aaaf0941a1fd42723df;p=linux-beck.git batman-adv: Place kref_get for nc_node 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 Signed-off-by: Marek Lindner Signed-off-by: Simon Wunderlich --- diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c index 3814cfb94846..4f4cfe53f973 100644 --- a/net/batman-adv/network-coding.c +++ b/net/batman-adv/network-coding.c @@ -859,7 +859,6 @@ batadv_nc_get_nc_node(struct batadv_priv *bat_priv, /* Initialize nc_node */ INIT_LIST_HEAD(&nc_node->list); kref_init(&nc_node->refcount); - kref_get(&nc_node->refcount); ether_addr_copy(nc_node->addr, orig_node->orig); kref_get(&orig_neigh_node->refcount); nc_node->orig_node = orig_neigh_node; @@ -878,6 +877,7 @@ batadv_nc_get_nc_node(struct batadv_priv *bat_priv, /* Add nc_node to orig_node */ spin_lock_bh(lock); + kref_get(&nc_node->refcount); list_add_tail_rcu(&nc_node->list, list); spin_unlock_bh(lock);