| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 004/125] net: ethernet: octeon_mgmt: Account for second possible VLAN header | Date | Mon, 11 Nov 2019 19:27:23 +0100 |
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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 @@ -1495,7 +1495,7 @@ 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);
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