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author | David S. Miller <davem@davemloft.net> | 2016-09-23 06:46:57 -0400 |
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committer | David S. Miller <davem@davemloft.net> | 2016-09-23 06:46:57 -0400 |
commit | d6989d4bbe6c4d1c2a76696833a07f044e85694d (patch) | |
tree | 2d9a70d0feee4d4a20568be1b39a961fa0d27d81 /net/batman-adv/routing.c | |
parent | 0364a8824c020f12e2d5e9fad963685b58f7574e (diff) | |
parent | b1f2beb87bb034bb209773807994279f90cace78 (diff) | |
download | linux-d6989d4bbe6c4d1c2a76696833a07f044e85694d.tar.bz2 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'net/batman-adv/routing.c')
-rw-r--r-- | net/batman-adv/routing.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 610f2c45edcd..7e8dc648b95a 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -461,6 +461,29 @@ static int batadv_check_unicast_packet(struct batadv_priv *bat_priv, } /** + * batadv_last_bonding_get - Get last_bonding_candidate of orig_node + * @orig_node: originator node whose last bonding candidate should be retrieved + * + * Return: last bonding candidate of router or NULL if not found + * + * The object is returned with refcounter increased by 1. + */ +static struct batadv_orig_ifinfo * +batadv_last_bonding_get(struct batadv_orig_node *orig_node) +{ + struct batadv_orig_ifinfo *last_bonding_candidate; + + spin_lock_bh(&orig_node->neigh_list_lock); + last_bonding_candidate = orig_node->last_bonding_candidate; + + if (last_bonding_candidate) + kref_get(&last_bonding_candidate->refcount); + spin_unlock_bh(&orig_node->neigh_list_lock); + + return last_bonding_candidate; +} + +/** * batadv_last_bonding_replace - Replace last_bonding_candidate of orig_node * @orig_node: originator node whose bonding candidates should be replaced * @new_candidate: new bonding candidate or NULL @@ -530,7 +553,7 @@ batadv_find_router(struct batadv_priv *bat_priv, * router - obviously there are no other candidates. */ rcu_read_lock(); - last_candidate = orig_node->last_bonding_candidate; + last_candidate = batadv_last_bonding_get(orig_node); if (last_candidate) last_cand_router = rcu_dereference(last_candidate->router); @@ -622,6 +645,9 @@ next: batadv_orig_ifinfo_put(next_candidate); } + if (last_candidate) + batadv_orig_ifinfo_put(last_candidate); + return router; } |