mac80211: fix mpath timer NULL function

If we have an mpath whose timer has not been initialized, don't try to
delete it.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index bd6b8b3e873a..bfd7638e235f 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -619,7 +619,8 @@ static void mesh_path_node_reclaim(struct rcu_head *rp)
         struct mpath_node *node = container_of(rp, struct mpath_node, rcu);
         struct ieee80211_sub_if_data *sdata = node->mpath->sdata;
 
-        del_timer_sync(&node->mpath->timer);
+        if (node->mpath->timer.function)
+                del_timer_sync(&node->mpath->timer);
         atomic_dec(&sdata->u.mesh.mpaths);
         kfree(node->mpath);
         kfree(node);
@@ -768,7 +769,8 @@ static void mesh_path_node_free(struct hlist_node *p, bool free_leafs)
         mpath = node->mpath;
         hlist_del_rcu(p);
         if (free_leafs) {
-                del_timer_sync(&mpath->timer);
+                if (mpath->timer.function)
+                        del_timer_sync(&mpath->timer);
                 kfree(mpath);
         }
         kfree(node);