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mlx4_en: Remove FCS bytes from packet length. 

When HW doesn't remove FCS bytes they are reported in the completion
byte count, we don't need to take them to skb.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Yevgeny Petrilin 2011-11-14 14:25:36 -05:00 committed by David S. Miller
parent 06236ac372
commit 4a5f4dd859
2 changed files with 6 additions and 1 deletions
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6
drivers/net/ethernet/mellanox/mlx4/en_rx.c
View File

@ -581,6 +581,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
* Packet is OK - process it.
*/
length = be32_to_cpu(cqe->byte_cnt);
length -= ring->fcs_del;
ring->bytes += length;
ring->packets++;
@ -813,8 +814,11 @@ static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn,
context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma);
/* Cancel FCS removal if FW allows */
if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)
if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP) {
context->param3 |= cpu_to_be32(1 << 29);
ring->fcs_del = ETH_FCS_LEN;
} else
ring->fcs_del = 0;
err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, context, qp, state);
if (err) {

1
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View File

@ -272,6 +272,7 @@ struct mlx4_en_rx_ring {
u32 prod;
u32 cons;
u32 buf_size;
u8 fcs_del;
void *buf;
void *rx_info;
unsigned long bytes;