app/testpmd: fix forwarding stats for Tx dropped

[ upstream commit c3fd1e6089cce14ad3f941ab5df0501e03b3356c ]

There is an inconsistency at displaying Tx dropped value for per port
forwarding stats and accumulated forwarding stats.

While displaying per port TX-dropped value, it only takes
'ports_stats[pt_id].tx_dropped' into account,
but for accumulated TX-dropped results it takes both
'ports_stats[pt_id].tx_dropped' & 'stats.oerrors' into account.

To fix, make both per port and accumulated stats display 'tx_dropped'
and 'stats.oerrors' (ports_stats[pt_id].tx_dropped + stats.oerrors).

Fixes: 5332497 ("app/testpmd: display/clear forwarding stats on demand")

Reported-by: Joshua Washington <joshwash@google.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@amd.com>
Acked-by: Huisong Li <lihuisong@huawei.com>
Acked-by: Aman Singh <aman.deep.singh@intel.com>

app/test-pmd/testpmd.c

@@ -1845,6 +1845,8 @@ fwd_stats_display(void)
 			fwd_cycles += fs->core_cycles;
 	}
 	for (i = 0; i < cur_fwd_config.nb_fwd_ports; i++) {
+		uint64_t tx_dropped = 0;
+
 		pt_id = fwd_ports_ids[i];
 		port = &ports[pt_id];
 
@@ -1866,8 +1868,9 @@ fwd_stats_display(void)
 		total_recv += stats.ipackets;
 		total_xmit += stats.opackets;
 		total_rx_dropped += stats.imissed;
-		total_tx_dropped += ports_stats[pt_id].tx_dropped;
-		total_tx_dropped += stats.oerrors;
+		tx_dropped += ports_stats[pt_id].tx_dropped;
+		tx_dropped += stats.oerrors;
+		total_tx_dropped += tx_dropped;
 		total_rx_nombuf  += stats.rx_nombuf;
 
 		printf("\n  %s Forward statistics for port %-2d %s\n",
@@ -1891,8 +1894,8 @@ fwd_stats_display(void)
 
 		printf("  TX-packets: %-14"PRIu64" TX-dropped: %-14"PRIu64
 		       "TX-total: %-"PRIu64"\n",
-		       stats.opackets, ports_stats[pt_id].tx_dropped,
-		       stats.opackets + ports_stats[pt_id].tx_dropped);
+		       stats.opackets, tx_dropped,
+		       stats.opackets + tx_dropped);
 
 		if (record_burst_stats) {
 			if (ports_stats[pt_id].rx_stream)