i4oe driver in version 2.19.3 overflow when bitrate get up of peta bytes

[mohammadkhanjani]

In i40e, overflows when stat->rx_discards. I check new version of i40e and patch of netmap but this problem exists:

static void i40e_stats_update_rx_discards(struct i40e_vsi *vsi,
			struct i40e_hw *hw, int stat_idx, bool offset_loaded,
			struct i40e_eth_stats *stat_offset,
			struct i40e_eth_stats *stat)
{
	u64 rx_rdpc, rx_rxerr;

	i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx), offset_loaded,
			   &stat_offset->rx_discards, &rx_rdpc);
	i40e_stat_update64(hw,
			   I40E_GL_RXERR1H(i40e_compute_pci_to_hw_id(vsi, hw)),
			   I40E_GL_RXERR1L(i40e_compute_pci_to_hw_id(vsi, hw)),
			   offset_loaded, &stat_offset->rx_discards_other,
			   &rx_rxerr);

	stat->rx_discards = rx_rdpc + rx_rxerr;
}