i40e: clamp jumbo frame size

The driver was allowing the user to set larger size MTU
than the hardware was being configured to support.

The driver was already using VLAN_HLEN when setting the
hardware max receivable frame size, so just add it to the
netdev MTU set entry point as well.

Change-ID: Ie20e2a35d04f8c411253e255bea79ca69aaeaea3
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jesse Brandeburg 2014-04-23 04:50:05 +00:00 committed by Jeff Kirsher
parent d0277054ac
commit 61a46a4c07
1 changed files with 1 additions and 1 deletions

View File

@ -1698,7 +1698,7 @@ static void i40e_sync_filters_subtask(struct i40e_pf *pf)
static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
{
struct i40e_netdev_priv *np = netdev_priv(netdev);
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
struct i40e_vsi *vsi = np->vsi;
/* MTU < 68 is an error and causes problems on some kernels */