inet: Minimize use of cached route inetpeer.

Only use it in the absolutely required cases:

1) COW'ing metrics

2) ipv4 PMTU

3) ipv4 redirects

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 4bce5a2830aa..4a049449305f 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -254,9 +254,10 @@ static inline bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
 
         /* Limit if icmp type is enabled in ratemask. */
         if ((1 << type) & net->ipv4.sysctl_icmp_ratemask) {
-                struct inet_peer *peer = rt_get_peer_create(rt, fl4->daddr);
+                struct inet_peer *peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, 1);
                 rc = inet_peer_xrlim_allow(peer,
                                            net->ipv4.sysctl_icmp_ratelimit);
+                inet_putpeer(peer);
         }
 out:
         return rc;