app/testpmd: log reason of port start failure

Provide a bit more diagnostics information when port start fails.

Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 98c3248..96d2e0f 100644 (file)
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2626,8 +2626,10 @@ start_port(portid_t pid)
                cnt_pi++;
 
                /* start port */
-               if (rte_eth_dev_start(pi) < 0) {
-                       printf("Fail to start port %d\n", pi);
+               diag = rte_eth_dev_start(pi);
+               if (diag < 0) {
+                       printf("Fail to start port %d: %s\n", pi,
+                              rte_strerror(-diag));
 
                        /* Fail to setup rx queue, return */
                        if (rte_atomic16_cmpset(&(port->port_status),