net/mlx4_en: Add RX-FCS support
Enabled when device supports KEEP FCS. When the flag is set, Ethernet FCS
is appended to the end of the frame, controlled by ethtool.
Signed-off-by: Muhammad Mahajna <muhammadm@mellanox.com>
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 698d60d..79b1501 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -1116,7 +1116,10 @@
/* Cancel FCS removal if FW allows */
if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP) {
context->param3 |= cpu_to_be32(1 << 29);
- ring->fcs_del = ETH_FCS_LEN;
+ if (priv->dev->features & NETIF_F_RXFCS)
+ ring->fcs_del = 0;
+ else
+ ring->fcs_del = ETH_FCS_LEN;
} else
ring->fcs_del = 0;