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authorAlexander Duyck <alexander.h.duyck@intel.com>2009-10-27 23:52:13 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-28 03:26:06 -0700
commitc809d2276cb035228cd9e83e2ca7d2b902c61cef (patch)
treec0fc93c5179142f6950a87ed3adea90911146eb4
parent090b17952826eb3c5d712b6d4f90a292fe4acc93 (diff)
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>
-rw-r--r--drivers/net/igb/igb_main.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 264ff005710..846e64f0ad8 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -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;
}