[dpdk-stable] [PATCH 2/6] net/ena: fix setting Rx checksum flags in mbuf

[Michal Krawczyk <mk@semihalf.com>]

The driver was never setting PKT_RX_*_CKSUM_GOOD flags, so the only way
of checking if the checksum was checked was by testing for the
PKT_RX_*_CKSUM_BAD. In that situation, the application couldn't detect
if the checksum was valid or unknown, as unknown flag is equal to 0.

Moreover, the l3_csum_err value is only valid if the l3_proto is
indicating IPv4, so it shouldn't be checked for other protocols.

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

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
---
 drivers/net/ena/ena_ethdev.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 7ab9b93ba9..ad593c882c 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -296,21 +296,23 @@ static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf,
 	else if (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)
 		packet_type |= RTE_PTYPE_L4_UDP;
 
-	if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4)
+	if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) {
 		packet_type |= RTE_PTYPE_L3_IPV4;
-	else if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV6)
+		if (unlikely(ena_rx_ctx->l3_csum_err))
+			ol_flags |= PKT_RX_IP_CKSUM_BAD;
+		else
+			ol_flags |= PKT_RX_IP_CKSUM_GOOD;
+	} else if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV6) {
 		packet_type |= RTE_PTYPE_L3_IPV6;
+	}
 
-	if (!ena_rx_ctx->l4_csum_checked)
+	if (!ena_rx_ctx->l4_csum_checked || ena_rx_ctx->frag)
 		ol_flags |= PKT_RX_L4_CKSUM_UNKNOWN;
 	else
-		if (unlikely(ena_rx_ctx->l4_csum_err) && !ena_rx_ctx->frag)
+		if (unlikely(ena_rx_ctx->l4_csum_err))
 			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;
+			ol_flags |= PKT_RX_L4_CKSUM_GOOD;
 
 	mbuf->ol_flags = ol_flags;
 	mbuf->packet_type = packet_type;
-- 
2.25.1