From: Alexander Sverdlin alexander.sverdlin@nokia.com
[ Upstream commit e4dd5608033efe7b6030cde359bfdbaeb73bc22d ]
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: 109cc16526c6d ("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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/cavium/octeon/octeon_mgmt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c +++ b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c @@ -1499,7 +1499,7 @@ static int octeon_mgmt_probe(struct plat 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);