mlxsw: Strip FCS from incoming packets
FCS of incoming packets is already checked by HW. Just strip it out.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index 298ead5b..3ec52ea 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -667,6 +667,7 @@
char *wqe;
struct sk_buff *skb;
struct mlxsw_rx_info rx_info;
+ u16 byte_count;
int err;
elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
@@ -686,7 +687,10 @@
rx_info.sys_port = mlxsw_pci_cqe_system_port_get(cqe);
rx_info.trap_id = mlxsw_pci_cqe_trap_id_get(cqe);
- skb_put(skb, mlxsw_pci_cqe_byte_count_get(cqe));
+ byte_count = mlxsw_pci_cqe_byte_count_get(cqe);
+ if (mlxsw_pci_cqe_crc_get(cqe))
+ byte_count -= ETH_FCS_LEN;
+ skb_put(skb, byte_count);
mlxsw_core_skb_receive(mlxsw_pci->core, skb, &rx_info);
put_new_skb:
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.h b/drivers/net/ethernet/mellanox/mlxsw/pci.h
index 887af84..1ef9664 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.h
@@ -155,6 +155,12 @@
*/
MLXSW_ITEM32(pci, cqe, trap_id, 0x08, 0, 8);
+/* pci_cqe_crc
+ * Length include CRC. Indicates the length field includes
+ * the packet's CRC.
+ */
+MLXSW_ITEM32(pci, cqe, crc, 0x0C, 8, 1);
+
/* pci_cqe_e
* CQE with Error.
*/
