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igb: limit minimum mtu to 68 to keep ip bound to interface

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Limit the minimum mtu to 68 in order to prevent ip from being unbound from
the interface.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2009-10-27 23:52:13 +00:00 committed by David S. Miller
parent 090b179528
commit c809d2276c
1 changed files with 1 additions and 2 deletions
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3
drivers/net/igb/igb_main.c
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@ -3709,8 +3709,7 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
u32 rx_buffer_len, i;
if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
(max_frame > MAX_JUMBO_FRAME_SIZE)) {
if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
dev_err(&pdev->dev, "Invalid MTU setting\n");
return -EINVAL;
}