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authorSven Eckelmann <sven@narfation.org>2016-07-15 18:39:29 +0300
committerSimon Wunderlich <sw@simonwunderlich.de>2016-08-09 08:54:50 +0300
commitdf28ca6bb3282a4c8dc5b65f60b0136fc190ee52 (patch)
tree4d9b1b0173ac642fab228511635881e51f4263e6 /net/batman-adv
parentb2367e46fa0d50fd784be3ec0a5c370bf2f2b61a (diff)
downloadlinux-df28ca6bb3282a4c8dc5b65f60b0136fc190ee52.tar.xz
batman-adv: Place kref_get for softif_vlan 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/soft-interface.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index e508bf5957b3..49e16b6e0ba3 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -594,6 +594,7 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
}
spin_lock_bh(&bat_priv->softif_vlan_list_lock);
+ kref_get(&vlan->refcount);
hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
@@ -604,6 +605,9 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
bat_priv->soft_iface->dev_addr, vid,
BATADV_NULL_IFINDEX, BATADV_NO_MARK);
+ /* don't return reference to new softif_vlan */
+ batadv_softif_vlan_put(vlan);
+
return 0;
}