[PATCH V2] app/testpmd: fix parameters order when calling rte_ether_addr_copy()

[Xu, Wei1]

Running in 'csum' mode, the 'from' and 'to' parameters are not
in the correct order when calling rte_ether_addr_copy() which
means the 'src/dst' mac addresses in the mbuf will be overwriten.

As a result, the packets will not be recognized and received
by the receiver(s).

Test CLI:
./app/dpdk-testpmd -n 1 -l 1-2 -a 09:00.0 -- -i --forward-mode=csum

Fixes: 10f4620(app/testpmd: modify mac in csum forwarding)

v2:
        - fixed indentation and long line warnings.

Signed-off-by: Wei Xu <wei1...@intel.com>
---
 app/test-pmd/csumonly.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index 8526d9158a..08484fcda2 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -872,10 +872,10 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
                 * and inner headers */
 
                eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
-               rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
-                               &eth_hdr->dst_addr);
-               rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
-                               &eth_hdr->src_addr);
+               rte_ether_addr_copy(&eth_hdr->dst_addr,
+                               &peer_eth_addrs[fs->peer_addr]);
+               rte_ether_addr_copy(&eth_hdr->src_addr,
+                               &ports[fs->tx_port].eth_addr);
                parse_ethernet(eth_hdr, &info);
                l3_hdr = (char *)eth_hdr + info.l2_len;
 
-- 
2.27.0