From d53f706da808e6d93dc60b1910233a309009939f Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Fri, 8 Aug 2008 18:36:06 -0700 Subject: [PATCH] e1000e: increase minimum frame size allowed Setting an MTU value below 68 was disabling the network connection and would not reconnect until the driver was reloaded. Prevent changing the MTU to anything below 68. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: Jeff Garzik --- drivers/net/e1000e/netdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index 4573c7b9cbd..b8b26cf78de 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -3724,7 +3724,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) struct e1000_adapter *adapter = netdev_priv(netdev); int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; - if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) || + if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { e_err("Invalid MTU setting\n"); return -EINVAL; -- 2.41.0