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| author | Antonio Quartulli <ordex@autistici.org> | 2012-03-16 11:52:31 +0100 |
|---|---|---|
| committer | Antonio Quartulli <ordex@autistici.org> | 2012-05-13 18:24:37 +0200 |
| commit | 8710e2613a4819aac44f4aed7e29027ac3eeb683 (patch) | |
| tree | 52a61a7ad228152e6c62111b6472b51bbecaf90c | |
| parent | f96a8a0b78548c0ec06b0b4b438db6ee895d67e9 (diff) | |
| download | kernel_goldelico_gta04-8710e2613a4819aac44f4aed7e29027ac3eeb683.zip kernel_goldelico_gta04-8710e2613a4819aac44f4aed7e29027ac3eeb683.tar.gz kernel_goldelico_gta04-8710e2613a4819aac44f4aed7e29027ac3eeb683.tar.bz2 | |
batman-adv: avoid skb_linearise() if not needed
Whenever we want to access headers only, we do not need to linearise the whole
packet. Instead we can use pskb_may_pull()
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
| -rw-r--r-- | net/batman-adv/routing.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 7ed9d8f..4c6467d 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -916,8 +916,9 @@ static int check_unicast_ttvn(struct bat_priv *bat_priv, /* Check whether I have to reroute the packet */ if (seq_before(unicast_packet->ttvn, curr_ttvn) || tt_poss_change) { - /* Linearize the skb before accessing it */ - if (skb_linearize(skb) < 0) + /* check if there is enough data before accessing it */ + if (pskb_may_pull(skb, sizeof(struct unicast_packet) + + ETH_HLEN) < 0) return 0; ethhdr = (struct ethhdr *)(skb->data + |