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xfrm: remove extranous rcu_read_lock

Browse source 
The handlers for xfrm_tunnel are always invoked with rcu read lock
already.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
stephen hemminger 2012-09-24 18:12:25 +00:00 • committed by David S. Miller
commit b0558ef24a
3 changed files with 1 additions and 19 deletions
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6
net/ipv6/sit.c
View file

@ -545,7 +545,6 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
err = -ENOENT;
rcu_read_lock();
t = ipip6_tunnel_lookup(dev_net(skb->dev),
skb->dev,
iph->daddr,
@ -579,7 +578,6 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
t->err_count = 1;
t->err_time = jiffies;
out:
rcu_read_unlock();
return err;
}
@ -599,7 +597,6 @@ static int ipip6_rcv(struct sk_buff *skb)
iph = ip_hdr(skb);
rcu_read_lock();
tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev,
iph->saddr, iph->daddr);
if (tunnel != NULL) {
@ -615,7 +612,6 @@ static int ipip6_rcv(struct sk_buff *skb)
if ((tunnel->dev->priv_flags & IFF_ISATAP) &&
!isatap_chksrc(skb, iph, tunnel)) {
tunnel->dev->stats.rx_errors++;
rcu_read_unlock();
kfree_skb(skb);
return 0;
}
@ -630,12 +626,10 @@ static int ipip6_rcv(struct sk_buff *skb)
netif_rx(skb);
rcu_read_unlock();
return 0;
}
/* no tunnel matched, let upstream know, ipsec may handle it */
rcu_read_unlock();
return 1;
out:
kfree_skb(skb);