[PATCH] examples/l3fwd: fix check of unchecked IP checksum

["Morten Brørup" <mb@smartsharesystems.com>]

If the PMD didn't check the IP header checksum, the
offload value is RTE_MBUF_F_RX_IP_CKSUM_UNKNOWN,
not RTE_MBUF_F_RX_IP_CKSUM_NONE.

Fixes: 4b01cabfb09b ("examples/l3fwd: add option to relax Rx offload")
Cc: stable@dpdk.org

Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
---
 examples/l3fwd/l3fwd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/l3fwd/l3fwd.h b/examples/l3fwd/l3fwd.h
index 349fc37c79..331d17602d 100644
--- a/examples/l3fwd/l3fwd.h
+++ b/examples/l3fwd/l3fwd.h
@@ -171,7 +171,7 @@ is_valid_ipv4_pkt(struct rte_ipv4_hdr *pkt, uint32_t link_len, uint64_t ol_flags
 
 	/* 2. The IP checksum must be correct. */
 	/* if this is not checked in H/W, check it. */
-	if ((ol_flags & RTE_MBUF_F_RX_IP_CKSUM_MASK) == RTE_MBUF_F_RX_IP_CKSUM_NONE) {
+	if ((ol_flags & RTE_MBUF_F_RX_IP_CKSUM_MASK) == RTE_MBUF_F_RX_IP_CKSUM_UNKNOWN) {
 		uint16_t actual_cksum, expected_cksum;
 		actual_cksum = pkt->hdr_checksum;
 		pkt->hdr_checksum = 0;
-- 
2.43.0