1 files changed, 12 insertions, 15 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 408cac4ae00a..420e56326384 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -154,6 +154,11 @@ static void addrconf_type_change(struct net_device *dev,
                                  unsigned long event);
 static int addrconf_ifdown(struct net_device *dev, int how);
 
+static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
+                                                  int plen,
+                                                  const struct net_device *dev,
+                                                  u32 flags, u32 noflags);
+
 static void addrconf_dad_start(struct inet6_ifaddr *ifp);
 static void addrconf_dad_timer(unsigned long data);
 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
@@ -250,12 +255,6 @@ static inline bool addrconf_qdisc_ok(const struct net_device *dev)
         return !qdisc_tx_is_noop(dev);
 }
 
-/* Check if a route is valid prefix route */
-static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
-{
-        return (rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0;
-}
-
 static void addrconf_del_timer(struct inet6_ifaddr *ifp)
 {
         if (del_timer(&ifp->timer))
@@ -941,17 +940,15 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
         if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
                 struct in6_addr prefix;
                 struct rt6_info *rt;
-                struct net *net = dev_net(ifp->idev->dev);
-                struct flowi6 fl6 = {};
 
                 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
-                fl6.flowi6_oif = ifp->idev->dev->ifindex;
-                fl6.daddr = prefix;
-                rt = (struct rt6_info *)ip6_route_lookup(net, &fl6,
-                                                         RT6_LOOKUP_F_IFACE);
 
-                if (rt != net->ipv6.ip6_null_entry &&
-                    addrconf_is_prefix_route(rt)) {
+                rt = addrconf_get_prefix_route(&prefix,
+                                               ifp->prefix_len,
+                                               ifp->idev->dev,
+                                               0, RTF_GATEWAY | RTF_DEFAULT);
+
+                if (rt) {
                         if (onlink == 0) {
                                 ip6_del_rt(rt);
                                 rt = NULL;
@@ -1877,7 +1874,7 @@ static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
                         continue;
                 if ((rt->rt6i_flags & flags) != flags)
                         continue;
-                if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0))
+                if ((rt->rt6i_flags & noflags) != 0)
                         continue;
                 dst_hold(&rt->dst);
                 break;