app/testpmd: revert setting MTU explicitly after configure

Setting MTU after each 'rte_eth_dev_configure()' prevents using
"--max-pkt-len=N" parameter and "port config all max-pkt-len #" command

This is breaking DTS scatter test case which is using
"--max-pkt-len=9000" testpmd parameter.

Reverting workaround to recover the DTS testcase.

Fixes: 1c21ee95cf52 ("app/testpmd: fix MTU after device configure")
Cc: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Tested-by: Bo Chen <box.c.chen@intel.com>

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 48e9647..33fc0fd 100644 (file)
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2537,8 +2537,6 @@ start_port(portid_t pid)
                }
 
                if (port->need_reconfig > 0) {
-                       uint16_t mtu = RTE_ETHER_MTU;
-
                        port->need_reconfig = 0;
 
                        if (flow_isolate_all) {
@@ -2572,23 +2570,6 @@ start_port(portid_t pid)
                                port->need_reconfig = 1;
                                return -1;
                        }
-
-                       /*
-                        * Workaround for rte_eth_dev_configure(), max_rx_pkt_len
-                        * set MTU wrong for the PMDs that have frame overhead
-                        * bigger than RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN.
-                        * For a PMD that has 26 bytes overhead, rte_eth_dev_configure()
-                        * can set MTU to max 1492, not to expected 1500 bytes.
-                        * Using rte_eth_dev_set_mtu() to be able to set MTU correctly,
-                        * default MTU value is 1500.
-                        */
-                       diag = rte_eth_dev_get_mtu(pi, &mtu);
-                       if (diag)
-                               printf("Failed to get MTU for port %d\n", pi);
-                       diag = rte_eth_dev_set_mtu(pi, mtu);
-                       if (diag != 0 && diag != -ENOTSUP)
-                               printf("Failed to set MTU to %u for port %d\n",
-                                               mtu, pi);
                }
                if (port->need_reconfig_queues > 0) {
                        port->need_reconfig_queues = 0;