net/i40e: fix Rx bytes statistics

[ upstream commit e8326d3 ]

Update the Rx-bytes statistics by subtract CRC bytes count from original
bytes count.

Fixes: bd7883c ("net/i40e: refactor some stats related functions")

Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
Tested-by: Jun W Zhou <junx.w.zhou@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/i40e/i40e_ethdev_vf.c

@@ -2388,6 +2388,7 @@ i40evf_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 		stats->imissed = pstats->rx_discards;
 		stats->oerrors = pstats->tx_errors + pstats->tx_discards;
 		stats->ibytes = pstats->rx_bytes;
+		stats->ibytes -= stats->ipackets * RTE_ETHER_CRC_LEN;
 		stats->obytes = pstats->tx_bytes;
 	} else {
 		PMD_DRV_LOG(ERR, "Get statistics failed");