From: Sven Eckelmann Date: Sat, 4 Sep 2010 23:58:38 +0000 (+0200) Subject: Staging: batman-adv: Update mtu of bat device by changing mtu of slave device X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=07fd7364b3799277b40228533530e2f301f7fd28;p=deliverable%2Flinux.git Staging: batman-adv: Update mtu of bat device by changing mtu of slave device We must reduce our own mtu when we reduce the mtu of any device we use to transfer our packets. Otherwise we may accept to large packets which gets dropped by the actual device. Reported-by: Vasiliy Kulikov Signed-off-by: Sven Eckelmann Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c index a58a89a7aa0e..a587da9c827e 100644 --- a/drivers/staging/batman-adv/hard-interface.c +++ b/drivers/staging/batman-adv/hard-interface.c @@ -469,6 +469,10 @@ static int hard_if_event(struct notifier_block *this, case NETDEV_UNREGISTER: hardif_remove_interface(batman_if); break; + case NETDEV_CHANGEMTU: + if (batman_if->soft_iface) + update_min_mtu(batman_if->soft_iface); + break; case NETDEV_CHANGEADDR: if (batman_if->if_status == IF_NOT_IN_USE) goto out;