Repository : ssh://git@open-mesh.org/batman-adv
On branch : master
commit 58d8ef2dd0c9f7274f0473a1b1d1ffdacdd914f6 Author: Markus Elfring elfring@users.sourceforge.net Date: Fri Mar 11 13:10:20 2016 +0100
batman-adv: Less function calls in batadv_is_ap_isolated() after error detection
The variables "tt_local_entry" and "tt_global_entry" were eventually checked again despite of a corresponding null pointer test before.
* Avoid this double check by reordering a function call sequence and the better selection of jump targets.
* Omit the initialisation for these variables at the beginning then.
Signed-off-by: Markus Elfring elfring@users.sourceforge.net Signed-off-by: Sven Eckelmann sven@narfation.org
58d8ef2dd0c9f7274f0473a1b1d1ffdacdd914f6 net/batman-adv/translation-table.c | 25 +++++++++++-------------- 1 file changed, 11 insertions(+), 14 deletions(-)
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 7f66309..ad1e3bc 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -3835,8 +3835,8 @@ void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, unsigned short vid) { - struct batadv_tt_local_entry *tt_local_entry = NULL; - struct batadv_tt_global_entry *tt_global_entry = NULL; + struct batadv_tt_local_entry *tt_local_entry; + struct batadv_tt_global_entry *tt_global_entry; struct batadv_softif_vlan *vlan; bool ret = false;
@@ -3845,27 +3845,24 @@ bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, return false;
if (!atomic_read(&vlan->ap_isolation)) - goto out; + goto vlan_put;
tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); if (!tt_local_entry) - goto out; + goto vlan_put;
tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); if (!tt_global_entry) - goto out; - - if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) - goto out; + goto local_entry_put;
- ret = true; + if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) + ret = true;
-out: + batadv_tt_global_entry_put(tt_global_entry); +local_entry_put: + batadv_tt_local_entry_put(tt_local_entry); +vlan_put: batadv_softif_vlan_put(vlan); - if (tt_global_entry) - batadv_tt_global_entry_put(tt_global_entry); - if (tt_local_entry) - batadv_tt_local_entry_put(tt_local_entry); return ret; }