0021-net-ena-fix-indication-of-bad-L4-Rx-checksums.patch

From a0233e4d8570687b69098c4bd8c6de3f7d0f3729 Mon Sep 17 00:00:00 2001
From: Igor Chauskin <igorch@amazon.com>
Date: Mon, 28 Oct 2019 11:23:33 +0100
Subject: [PATCH 21/27] net/ena: fix indication of bad L4 Rx checksums

[ upstream commit 05817057faba9356900ced61e24a22eef6bc4c87 ]

Add checking of l4_csum_checked and frag flags before checking the
l4_csum_error flag.

In case of IP fragment/unchecked L4 csum - add PKT_RX_L4_CKSUM_UNKNOWN
flag to the indicated mbuf.

Fixes: 1173fca25af9 ("ena: add polling-mode driver")
Cc: stable@dpdk.org

Change-Id: I9f1414741eb44ca289a8bfd11d7e66110c95040e
Signed-off-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Maciej Bielski <mba@semihalf.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>
---
 drivers/net/ena/ena_ethdev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 7768eabbab..dd60b7582d 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -292,8 +292,11 @@ static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf,
 	else if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV6)
 		packet_type |= RTE_PTYPE_L3_IPV6;
 
-	if (unlikely(ena_rx_ctx->l4_csum_err))
+	if (unlikely(ena_rx_ctx->l4_csum_err) && !ena_rx_ctx->frag)
 		ol_flags |= PKT_RX_L4_CKSUM_BAD;
+	else
+		ol_flags |= PKT_RX_L4_CKSUM_UNKNOWN;
+
 	if (unlikely(ena_rx_ctx->l3_csum_err))
 		ol_flags |= PKT_RX_IP_CKSUM_BAD;
 
-- 
2.20.1