Commit c809d227 authored Oct 27, 2009 by Alexander Duyck Committed by David S. Miller Oct 28, 2009

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



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>

parent 090b1795

drivers/net/igb/igb_main.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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;
		}