[PATCH iwl-net 4/4] ice: report EIPE checksum errors to the OS on E830

[Aleksandr Loktionov <aleksandr.loktionov@intel.com>]

From: Jan Glaza <jan.glaza@intel.com>

For E830 adapters the hardware-reported EIPE (Ethernet Inline IPsec
Engine) error is a reliable indication that a received packet failed
decryption and has a bad checksum. Route EIPE errors through the
generic checksum error path on E830 so the error is visible via
standard ethtool statistics (rx_csum_bad).

On previous devices (E810, E82X) the EIPE flag can be spuriously set
on encapsulated packets with inner L2 padding, so those adapters only
increment the driver-private hw_rx_eipe_error counter without routing
through the checksum error path.

Fixes: 0ca6755f3cc2 ("ice: Add a new counter for Rx EIPE errors")
Signed-off-by: Jan Glaza <jan.glaza@intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
index e695a66..82d9d2c4 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
@@ -140,6 +140,8 @@ ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb,

 	if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S)))) {
 		ring->vsi->back->hw_rx_eipe_error++;
+		if (ring->vsi->back->hw.mac_type == ICE_MAC_E830)
+			goto checksum_fail;
 		return;
 	}

--
2.52.0