[PATCH net-next] ipv6: have a single rcu unlock point in __ip6_rt_update_pmtu

[David Ahern]

From: David Ahern <dsah...@gmail.com>

Simplify the unlock path in __ip6_rt_update_pmtu by using a
single point where rcu_read_unlock is called.

Signed-off-by: David Ahern <dsah...@gmail.com>
---
 net/ipv6/route.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e49fec767a10..3c5c331b50f1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2725,10 +2725,9 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, 
const struct sock *sk,
 
                rcu_read_lock();
                res.f6i = rcu_dereference(rt6->from);
-               if (!res.f6i) {
-                       rcu_read_unlock();
-                       return;
-               }
+               if (!res.f6i)
+                       goto out_unlock;
+
                res.fib6_flags = res.f6i->fib6_flags;
                res.fib6_type = res.f6i->fib6_type;
 
@@ -2744,10 +2743,8 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, 
const struct sock *sk,
                        /* fib6_info uses a nexthop that does not have fib6_nh
                         * using the dst->dev + gw. Should be impossible.
                         */
-                       if (!arg.match) {
-                               rcu_read_unlock();
-                               return;
-                       }
+                       if (!arg.match)
+                               goto out_unlock;
 
                        res.nh = arg.match;
                } else {
@@ -2760,6 +2757,7 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, 
const struct sock *sk,
                        if (rt6_insert_exception(nrt6, &res))
                                dst_release_immediate(&nrt6->dst);
                }
+out_unlock:
                rcu_read_unlock();
        }
 }
-- 
2.11.0