Merge remote-tracking branch 'lsk/v3.10/topic/gator' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / net / ipv6 / addrconf.c

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index b78a3ee93d52b655426a07a4278c46c09f8e31be..7bcdd0df68dbad627c6578b7efd83705e3abfc1c 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1111,8 +1111,11 @@ retry:
         * Lifetime is greater than REGEN_ADVANCE time units.  In particular,
         * an implementation must not create a temporary address with a zero
         * Preferred Lifetime.
+        * Use age calculation as in addrconf_verify to avoid unnecessary
+        * temporary addresses being generated.
         */
-       if (tmp_prefered_lft <= regen_advance) {
+       age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
+       if (tmp_prefered_lft <= regen_advance + age) {
                in6_ifa_put(ifp);
                in6_dev_put(idev);
                ret = -1;