xfrm: remove extranous rcu_read_lock

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

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 6 deletions

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 3bd1bfc01f8..3ed54ffd8d5 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -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);