From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 06/14] i40e: clamp jumbo frame size Date: Thu, 5 Jun 2014 00:49:19 -0700 Message-ID: <1401954567-13557-7-git-send-email-jeffrey.t.kirsher@intel.com> References: <1401954567-13557-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Jesse Brandeburg , netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga02.intel.com ([134.134.136.20]:52015 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751833AbaFEHtl (ORCPT ); Thu, 5 Jun 2014 03:49:41 -0400 In-Reply-To: <1401954567-13557-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Jesse Brandeburg 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 Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 2412c71..b5a8a61 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -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 */ -- 1.9.3