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batman-adv: linearise the tt_response skb only if needed

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The TT_RESPONSE skb has to be linearised only if the node plans to access the
packet payload (so only if the message is directed to that node). In all the
other cases the node can avoid this memory operation

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
This commit is contained in:
Antonio Quartulli 2011-10-16 20:32:02 +02:00 committed by Sven Eckelmann
parent d099c2c541
commit dc58fe32e6
1 changed files with 6 additions and 5 deletions
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11
net/batman-adv/routing.c
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@ -616,13 +616,14 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
}
break;
case TT_RESPONSE:
/* packet needs to be linearized to access the TT changes */
if (skb_linearize(skb) < 0)
goto out;
if (is_my_mac(tt_query->dst)) {
/* packet needs to be linearized to access the TT
* changes */
if (skb_linearize(skb) < 0)
goto out;
if (is_my_mac(tt_query->dst))
handle_tt_response(bat_priv, tt_query);
else {
} else {
bat_dbg(DBG_TT, bat_priv,
"Routing TT_RESPONSE to %pM [%c]\n",
tt_query->dst,