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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 <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Bruce Allan 2008-08-08 18:36:06 -07:00 committed by Jeff Garzik
parent 10f1b49213
commit d53f706da8
1 changed files with 1 additions and 1 deletions
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2
drivers/net/e1000e/netdev.c
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@ -3724,7 +3724,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
struct e1000_adapter *adapter = netdev_priv(netdev); struct e1000_adapter *adapter = netdev_priv(netdev);
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 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)) { (max_frame > MAX_JUMBO_FRAME_SIZE)) {
e_err("Invalid MTU setting\n"); e_err("Invalid MTU setting\n");
return -EINVAL; return -EINVAL;