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| author | Sven Eckelmann <sven@narfation.org> | 2016-07-15 18:39:27 +0300 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2016-08-09 08:54:49 +0300 |
| commit | f665fa7e85e9e32deadc8aee35c958334c812d8d (patch) | |
| tree | 215ce270a5ec0db25d8d22b59f0c60bcee5a91bf /net/batman-adv | |
| parent | 6a51e09d8b5828698217ac4a04b97de1e5415978 (diff) | |
| download | linux-f665fa7e85e9e32deadc8aee35c958334c812d8d.tar.xz | |
batman-adv: Place kref_get for gw_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 <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/gateway_client.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index b889e1fdba4d..4b51b1cf4f76 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -339,14 +339,15 @@ static void batadv_gw_node_add(struct batadv_priv *bat_priv, if (!gw_node) return; + kref_init(&gw_node->refcount); INIT_HLIST_NODE(&gw_node->list); kref_get(&orig_node->refcount); gw_node->orig_node = orig_node; gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); - kref_init(&gw_node->refcount); spin_lock_bh(&bat_priv->gw.list_lock); + kref_get(&gw_node->refcount); hlist_add_head_rcu(&gw_node->list, &bat_priv->gw.list); spin_unlock_bh(&bat_priv->gw.list_lock); @@ -357,6 +358,9 @@ static void batadv_gw_node_add(struct batadv_priv *bat_priv, ntohl(gateway->bandwidth_down) % 10, ntohl(gateway->bandwidth_up) / 10, ntohl(gateway->bandwidth_up) % 10); + + /* don't return reference to new gw_node */ + batadv_gw_node_put(gw_node); } /** |