[PATCH 08/10] examples/qos_sched: check return value from rte_eth_link_get

[Stephen Hemminger]

The return status of link is undefined if call to rte_eth_link_get
returns an error.

Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
 examples/qos_sched/init.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/examples/qos_sched/init.c b/examples/qos_sched/init.c
index 32964fd57e..ace7279c67 100644
--- a/examples/qos_sched/init.c
+++ b/examples/qos_sched/init.c
@@ -323,6 +323,7 @@ int app_init(void)
        uint32_t i;
        char ring_name[MAX_NAME_LEN];
        char pool_name[MAX_NAME_LEN];
+       int ret;
 
        if (rte_eth_dev_count_avail() == 0)
                rte_exit(EXIT_FAILURE, "No Ethernet port - bye\n");
@@ -368,12 +369,20 @@ int app_init(void)
                app_init_port(qos_conf[i].tx_port, qos_conf[i].mbuf_pool);
 
                memset(&link, 0, sizeof(link));
-               rte_eth_link_get(qos_conf[i].tx_port, &link);
+               ret = rte_eth_link_get(qos_conf[i].tx_port, &link);
+               if (ret < 0)
+                       rte_exit(EXIT_FAILURE,
+                                "rte_eth_link_get: err=%d, port=%u: %s\n",
+                                ret, qos_conf[i].tx_port, rte_strerror(-ret));
                if (link.link_status == 0)
                        printf("Waiting for link on port %u\n", 
qos_conf[i].tx_port);
+
                while (link.link_status == 0 && retry_count--) {
                        rte_delay_ms(retry_delay);
-                       rte_eth_link_get(qos_conf[i].tx_port, &link);
+                       ret = rte_eth_link_get(qos_conf[i].tx_port, &link);
+                       rte_exit(EXIT_FAILURE,
+                                "rte_eth_link_get: err=%d, port=%u: %s\n",
+                                ret, qos_conf[i].tx_port, rte_strerror(-ret));
                }
 
                qos_conf[i].sched_port = 
app_init_sched_port(qos_conf[i].tx_port, socket);
-- 
2.45.2