• Sven Eckelmann's avatar
    batman-adv: Revert "use core MTU range checking in misc drivers" · 701470ba
    Sven Eckelmann authored
    The maximum MTU is defined via the slave devices of an batman-adv
    interface. Thus it is not possible to calculate the max_mtu during the
    creation of the batman-adv device when no slave devices are attached. Doing
    so would for example break non-fragmentation setups which then
    (incorrectly) allow an MTU of 1500 even when underlying device cannot
    transport 1500 bytes + batman-adv headers.
    
    Checking the dynamically calculated max_mtu via the minimum of the slave
    devices MTU during .ndo_change_mtu is also used by the bridge interface.
    
    Cc: Jarod Wilson <jarod@redhat.com>
    Fixes: b3e3893e
    
     ("net: use core MTU range checking in misc drivers")
    Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    701470ba