The "port config dcb ..." command will segment fault when input with
invalid port id, this patch fixes it.

Fixes: 9b53e542e9e1 ("app/testpmd: add priority flow control")
Cc: sta...@dpdk.org

Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
---
 app/test-pmd/cmdline.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 86d763b66a..56031fbd4e 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -3462,6 +3462,9 @@ cmd_config_dcb_parsed(void *parsed_result,
        uint8_t pfc_en;
        int ret;
 
+       if (port_id_is_invalid(port_id, ENABLED_WARN))
+               return;
+
        port = &ports[port_id];
        /** Check if the port is not started **/
        if (port->port_status != RTE_PORT_STOPPED) {
@@ -6664,6 +6667,9 @@ cmd_priority_flow_ctrl_set_parsed(void *parsed_result,
        int rx_fc_enable, tx_fc_enable;
        int ret;
 
+       if (port_id_is_invalid(res->port_id, ENABLED_WARN))
+               return;
+
        /*
         * Rx on/off, flow control is enabled/disabled on RX side. This can 
indicate
         * the RTE_ETH_FC_TX_PAUSE, Transmit pause frame at the Rx side.
-- 
2.17.1

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