unimore/kernel-hacking-2024-linux-steffo
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i40e: add double of VLAN header when computing the max MTU

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Include the second VLAN HLEN into account when computing the maximum
MTU size as other drivers do.

Fixes: 0c8493d90b ("i40e: add XDP support for pass and drop actions")
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Jason Xing 2023-02-08 10:43:33 +08:00 committed by Tony Nguyen
parent f9cd6a4418
commit ce45ffb815
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -2921,7 +2921,7 @@ static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
struct i40e_pf *pf = vsi->back;
if (i40e_enabled_xdp_vsi(vsi)) {
int frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
int frame_size = new_mtu + I40E_PACKET_HDR_PAD;
if (frame_size > i40e_max_xdp_frame_size(vsi))
return -EINVAL;