From: Jesse Brandeburg <jesse.brandeburg@intel.com>
Date: Fri, 12 Sep 2008 02:56:28 +0000 (-0700)
Subject: ixgbe: limit small mtu to minimum for ipv4 support
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=42c783c5b1b755ae2ab2dec720ad58ffc2257a60;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

ixgbe: limit small mtu to minimum for ipv4 support

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index cfaa3ca28f51..2c8895e9daed 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2839,8 +2839,8 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
 	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
 
-	if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) ||
-	    (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
+	/* MTU < 68 is an error and causes problems on some kernels */
+	if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
 		return -EINVAL;
 
 	DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",