ipv6: introduce ip6_rt_put()

As suggested by Eric, we could introduce a helper function
for ipv6 too, to avoid checking if rt is NULL before
dst_release().

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 4 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index ced58e1d91b6..fab23db8ee73 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -699,7 +699,7 @@ void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
                 pr_warn("Freeing alive inet6 address %p\n", ifp);
                 return;
         }
-        dst_release(&ifp->rt->dst);
+        ip6_rt_put(ifp->rt);
 
         kfree_rcu(ifp, rcu);
 }
@@ -951,7 +951,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
                                 rt6_set_expires(rt, expires);
                         }
                 }
-                dst_release(&rt->dst);
+                ip6_rt_put(rt);
         }
 
         /* clean up prefsrc entries */
@@ -2027,8 +2027,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
                         addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
                                               dev, expires, flags);
                 }
-                if (rt)
-                        dst_release(&rt->dst);
+                ip6_rt_put(rt);
         }
 
         /* Try to figure out our local address for this prefix */