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| author | Antonio Quartulli <ordex@autistici.org> | 2011-04-25 22:44:32 +0200 |
|---|---|---|
| committer | Sven Eckelmann <sven@narfation.org> | 2011-05-01 22:49:03 +0200 |
| commit | 71e4aa9c465fd66c110667ab5d620fb6a4ef2157 (patch) | |
| tree | 2abf828534472096dab635786c24a69c49b8965e /net | |
| parent | batman-adv: Move definition of atomic_dec_not_zero() into main.h (diff) | |
| download | linux-71e4aa9c465fd66c110667ab5d620fb6a4ef2157.tar.xz linux-71e4aa9c465fd66c110667ab5d620fb6a4ef2157.zip | |
batman-adv: fix gw_node_update() and gw_election()
This is a regression from c4aac1ab9b973798163b34939b522f01e4d28ac9
- gw_node_update() doesn't add a new gw_node in case of empty curr_gw.
This means that at the beginning no gw_node is added, leading to an
empty gateway list.
- gw_election() is terminating in case of curr_gw == NULL. It has to
terminate in case of curr_gw != NULL
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/batman-adv/gateway_client.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index 2acd7a666bda..af128eff2edf 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -127,7 +127,7 @@ void gw_election(struct bat_priv *bat_priv) return; curr_gw = gw_get_selected_gw_node(bat_priv); - if (!curr_gw) + if (curr_gw) goto out; rcu_read_lock(); @@ -310,9 +310,13 @@ void gw_node_update(struct bat_priv *bat_priv, struct hlist_node *node; struct gw_node *gw_node, *curr_gw; + /** + * Note: We don't need a NULL check here, since curr_gw never gets + * dereferenced. If curr_gw is NULL we also should not exit as we may + * have this gateway in our list (duplication check!) even though we + * have no currently selected gateway. + */ curr_gw = gw_get_selected_gw_node(bat_priv); - if (!curr_gw) - goto out; rcu_read_lock(); hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) { @@ -350,7 +354,7 @@ deselect: gw_deselect(bat_priv); unlock: rcu_read_unlock(); -out: + if (curr_gw) gw_node_free_ref(curr_gw); } |