net/bnxt: fix Rx checksum flags

For frames where the hardware is not able to calculate checksum
we are indicating such frames to be bad. And that is incorrect.
Indicate PKT_RX_IP_CKSUM_UNKNOWN or PKT_RX_L4_CKSUM_UNKNOWN
for such frames.

Fixes: 7ec39d8 ("net/bnxt: update status of Rx IP/L4 CKSUM")
Cc: stable@dpdk.org

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

drivers/net/bnxt/bnxt_rxr.c

@@ -464,11 +464,15 @@ static int bnxt_rx_pkt(struct rte_mbuf **rx_pkt,
 
 	if (likely(RX_CMP_IP_CS_OK(rxcmp1)))
 		mbuf->ol_flags |= PKT_RX_IP_CKSUM_GOOD;
+	else if (likely(RX_CMP_IP_CS_UNKNOWN(rxcmp1)))
+		mbuf->ol_flags |= PKT_RX_IP_CKSUM_UNKNOWN;
 	else
 		mbuf->ol_flags |= PKT_RX_IP_CKSUM_BAD;
 
 	if (likely(RX_CMP_L4_CS_OK(rxcmp1)))
 		mbuf->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
+	else if (likely(RX_CMP_L4_CS_UNKNOWN(rxcmp1)))
+		mbuf->ol_flags |= PKT_RX_L4_CKSUM_UNKNOWN;
 	else
 		mbuf->ol_flags |= PKT_RX_L4_CKSUM_BAD;
 

drivers/net/bnxt/bnxt_rxr.h

@@ -36,6 +36,9 @@
 	    (((rxcmp1)->flags2 & RX_CMP_L4_CS_BITS) &&		\
 	     !((rxcmp1)->errors_v2 & RX_CMP_L4_CS_ERR_BITS))
 
+#define RX_CMP_L4_CS_UNKNOWN(rxcmp1)					\
+	    !((rxcmp1)->flags2 & RX_CMP_L4_CS_BITS)
+
 #define RX_CMP_IP_CS_ERR_BITS	\
 	rte_cpu_to_le_32(RX_PKT_CMPL_ERRORS_IP_CS_ERROR | \
 			 RX_PKT_CMPL_ERRORS_T_IP_CS_ERROR)
@@ -48,6 +51,9 @@
 		(((rxcmp1)->flags2 & RX_CMP_IP_CS_BITS) &&	\
 		!((rxcmp1)->errors_v2 & RX_CMP_IP_CS_ERR_BITS))
 
+#define RX_CMP_IP_CS_UNKNOWN(rxcmp1)					\
+		!((rxcmp1)->flags2 & RX_CMP_IP_CS_BITS)
+
 enum pkt_hash_types {
 	PKT_HASH_TYPE_NONE,	/* Undefined type */
 	PKT_HASH_TYPE_L2,	/* Input: src_MAC, dest_MAC */