batman-adv: Use kref_get for batadv_tvlv_container_get
batadv_tvlv_container_get requires that tvlv.container_list_lock is held by
the caller. It is therefore not possible that an item in
tvlv.container_list has an reference counter of 0 and is still in the list
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>
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index c8d8bc7..5f2974b 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -748,9 +748,7 @@
if (tvlv_tmp->tvlv_hdr.version != version)
continue;
- if (!kref_get_unless_zero(&tvlv_tmp->refcount))
- continue;
-
+ kref_get(&tvlv_tmp->refcount);
tvlv = tvlv_tmp;
break;
}
