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net: ethernet: octeon_mgmt: Account for second possible VLAN header 

Octeon's input ring-buffer entry has 14 bits-wide size field, so to account
for second possible VLAN header max_mtu must be further reduced.

Fixes: 109cc16526 ("ethernet/cavium: use core min/max MTU checking")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Sverdlin 2019-11-08 10:00:44 +00:00 committed by David S. Miller
parent e0a312629f
commit e4dd560803
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
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@ -1499,7 +1499,7 @@ static int octeon_mgmt_probe(struct platform_device *pdev)
netdev->ethtool_ops = &octeon_mgmt_ethtool_ops;
netdev->min_mtu = 64 - OCTEON_MGMT_RX_HEADROOM;
netdev->max_mtu = 16383 - OCTEON_MGMT_RX_HEADROOM;
netdev->max_mtu = 16383 - OCTEON_MGMT_RX_HEADROOM - VLAN_HLEN;
mac = of_get_mac_address(pdev->dev.of_node);