net/mlx5: add missing return value check

[dpdk.git] / drivers / net / mlx5 / mlx5_ethdev.c

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 84d761c8e91638d635278fa71e0895d668bf684d..2e8a2969fe7328b03b7f5ece85618497ed780021 100644 (file)
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1365,6 +1365,7 @@ mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
        bool port_name_set = false;
        bool port_switch_id_set = false;
        char c;
+       int ret;
 
        if (!if_indextoname(ifindex, ifname)) {
                rte_errno = errno;
@@ -1378,9 +1379,11 @@ mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
 
        file = fopen(phys_port_name, "rb");
        if (file != NULL) {
-               fscanf(file, "%s", port_name);
+               ret = fscanf(file, "%s", port_name);
                fclose(file);
-               port_name_set = mlx5_translate_port_name(port_name, &data);
+               if (ret == 1)
+                       port_name_set = mlx5_translate_port_name(port_name,
+                                                                &data);
        }
        file = fopen(phys_switch_id, "rb");
        if (file == NULL) {