From: David S. Miller Date: Fri, 23 Mar 2018 16:54:35 +0000 (-0400) Subject: Merge branch 'mlxsw-GRE-mtu-changes' X-Git-Tag: microblaze-v4.18-rc1~230^2~42 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=69ebaed0c6b5f52d2dc15fb164bc2b2619ae04b9;p=linux-2.6-microblaze.git Merge branch 'mlxsw-GRE-mtu-changes' Ido Schimmel says: ==================== mlxsw: Handle changes to MTU in GRE tunnels Petr says: When offloading GRE tunnels, the MTU setting is kept fixed after the initial offload even as the slow-path configuration changed. Worse: the offloaded MTU setting is actually just a transient value set at the time of NETDEV_REGISTER of the tunnel. As of commit ffc2b6ee4174 ("ip_gre: fix IFLA_MTU ignored on NEWLINK"), that transient value is zero, and unless there's e.g. a VRF migration that prompts re-offload, it stays at zero, and all GRE packets end up trapping. Thus, in patch #1, change the way the MTU is changed post-registration, so that the full event protocol is observed. That way the drivers get to see the change and have a chance to react. In the remaining two patches, implement support for MTU change in mlxsw driver. ==================== Signed-off-by: David S. Miller --- 69ebaed0c6b5f52d2dc15fb164bc2b2619ae04b9