batman-adv: Use kref_get for batadv_gw_node_add
authorSven Eckelmann <sven@narfation.org>
Sat, 5 Mar 2016 15:09:23 +0000 (16:09 +0100)
committerAntonio Quartulli <a@unstable.cc>
Tue, 10 May 2016 10:28:29 +0000 (18:28 +0800)
commitc3ba37a778ecab4f8ddb117a2ceff3e13184a7db
tree6fdca2a748684e550135bbe736ab3fbbb1d0e099
parenta08d497d6718d579e496a801115aecc1c4fbb770
batman-adv: Use kref_get for batadv_gw_node_add

batadv_gw_node_add requires that the caller already has a valid reference
for orig_node. It is therefore not possible that it has an reference
counter of 0 and was still given to this function

The kref_get function instead WARNs (with debug information) when the
reference counter would still be 0. This makes a bug in batman-adv better
visible because kref_get_unless_zero would have ignored this problem.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
net/batman-adv/gateway_client.c