From: Veaceslav Falico Date: Wed, 15 Jan 2014 23:02:19 +0000 (+0100) Subject: team: block mtu change before it happens via NETDEV_PRECHANGEMTU X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b01f236c66b214a73816a4083050f73481638a72;p=openwrt%2Fstaging%2Fblogic.git team: block mtu change before it happens via NETDEV_PRECHANGEMTU Now it catches the NETDEV_CHANGEMTU notification, which is signaled after the actual change happened on the device, and returns NOTIFY_BAD, so that the change on the device is reverted. This might be quite costly and messy, so use the new NETDEV_PRECHANGEMTU to catch the MTU change before the actual change happens and signal that it's forbidden to do it. CC: Jiri Pirko Signed-off-by: Veaceslav Falico Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index b75ae5bde673..dff24e3dde4a 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -2851,7 +2851,7 @@ static int team_device_event(struct notifier_block *unused, case NETDEV_FEAT_CHANGE: team_compute_features(port->team); break; - case NETDEV_CHANGEMTU: + case NETDEV_PRECHANGEMTU: /* Forbid to change mtu of underlaying device */ return NOTIFY_BAD; case NETDEV_PRE_TYPE_CHANGE: