ipv6: fix the noflags test in addrconf_get_prefix_route

The tests on the flags in addrconf_get_prefix_route() does no make
much sense: the 'noflags' parameter contains the set of flags that
must not match with the route flags, so the test must be done
against 'noflags', and not against 'flags'.

Signed-off-by: Romain Kuntz <r.kuntz@ipflavors.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 408cac4a..29ba4ff1 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1877,7 +1877,7 @@
 			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;