The rte_net_intel_cksum_flags_prepare() function prepares the
pseudoheader checksum in packet data when doing checksum or TSO
offload.

It does nothing when no checksum offload flag is set in mbuf. But
in case of a IPv6/TCP TSO packet, it is not mandatory to have a
checksum flag. We also need to check the PKT_TX_TCP_SEG flag in addition
to checksum flags to fix offload preparation for such packets.

Fixes: 520059a41aa9 ("net: check fragmented headers in non-debug as well")

Signed-off-by: Yuying Zhang <redacted>
Acked-by: Olivier Matz <redacted>
Reviewed-by: David Marchand <redacted>
---
 lib/librte_net/rte_net.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_net/rte_net.h b/lib/librte_net/rte_net.h
index 1edc283a4..94b06d9ee 100644
--- a/lib/librte_net/rte_net.h
+++ b/lib/librte_net/rte_net.h

@@ -125,7 +125,7 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
 	 * Mainly it is required to avoid fragmented headers check if
 	 * no offloads are requested.
 	 */
-	if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK)))
+	if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG)))
 		return 0;
 
 	if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))

-- 
2.25.1