app/testpmd: fix check without outer checksum

[ upstream commit 4219d76 ]

Donot use outer metadata when neither outer ip checksum nor
outer udp checksum is enabled. PMD's will ignore the
outer_l2_len and outer_l3_len in cases where none of
the outer checksum is enabled and hence only l2_len and
l3_len will be used to calculate the offsets for L2 or L3
header.

Fixes: 3c32113 ("app/testpmd: fix IPv6 tunnel checksum")

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>

app/test-pmd/csumonly.c

@@ -927,8 +927,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
 			    (tx_offloads &
 			     DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
 			    (tx_offloads &
-			     DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
-			    (tx_ol_flags & PKT_TX_OUTER_IPV6)) {
+			     DEV_TX_OFFLOAD_OUTER_UDP_CKSUM)) {
 				m->outer_l2_len = info.outer_l2_len;
 				m->outer_l3_len = info.outer_l3_len;
 				m->l2_len = info.l2_len;