net: remove MTU limits for dummy and ifb device
These two drivers (dummy and ifb) call ether_setup(), after commit
61e84623ace3 ("net: centralize net_device min/max MTU checking"), the
range of mtu is [min_mtu, max_mtu], which is [68, 1500] by default.
These two devices should not have limits on MTU. This patch set their
min_mtu/max_mtu to 0. So that dev_set_mtu() will not check the mtu range,
and can be set with any value.
CC: Eric Dumazet <edumazet@google.com>
CC: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index 8870bd2..0008da7 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -231,6 +231,9 @@
eth_hw_addr_random(dev);
dev->needs_free_netdev = true;
dev->priv_destructor = ifb_dev_free;
+
+ dev->min_mtu = 0;
+ dev->max_mtu = 0;
}
static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)