[PATCH cumulus-4.1.y 2/5] vxlan: don't replace fdb entry if nothing changed

[Roopa Prabhu]

From: Balakrishnan Raman <ram...@cumulusnetworks.com>

This will avoid unnecessary notifications to userspace.

Signed-off-by: Balakrishnan Raman <ram...@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <ro...@cumulusnetworks.com>
---
 drivers/net/vxlan.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 15b1c23..72b99ff 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -467,12 +467,19 @@ static int vxlan_fdb_replace(struct vxlan_fdb *f,
        if (!rd)
                return 0;
 
-       dst_cache_reset(&rd->dst_cache);
-       rd->remote_ip = *ip;
-       rd->remote_port = port;
-       rd->remote_vni = vni;
-       rd->remote_ifindex = ifindex;
-       return 1;
+       if (!vxlan_addr_equal(&rd->remote_ip, ip) ||
+           rd->remote_port != port ||
+           rd->remote_vni != vni ||
+           rd->remote_ifindex != ifindex) {
+               dst_cache_reset(&rd->dst_cache);
+               rd->remote_ip = *ip;
+               rd->remote_port = port;
+               rd->remote_vni = vni;
+               rd->remote_ifindex = ifindex;
+               return 1;
+       }
+
+       return 0;
 }
 
 /* Add/update destinations for multicast */
-- 
1.9.1