[PATCH] examples/vdpa: fix disabled VirtQ statistics query

[Xueming Li]

Quit VirtQ statistics query instead of reporting error.

Fixes: 6505865aa8ed ("examples/vdpa: add statistics show command")
Cc: sta...@dpdk.org

Signed-off-by: Xueming Li <xuemi...@nvidia.com>
---
 examples/vdpa/main.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/examples/vdpa/main.c b/examples/vdpa/main.c
index 5ab07655aed..bd66deca85c 100644
--- a/examples/vdpa/main.c
+++ b/examples/vdpa/main.c
@@ -391,7 +391,9 @@ static void cmd_device_stats_parsed(void *parsed_result, 
struct cmdline *cl,
        struct rte_vdpa_device *vdev = rte_vdpa_find_device_by_name(res->bdf);
        struct vdpa_port *vport = NULL;
        uint32_t first, last;
+       int vq_disabled = -1;
        int i;
+       int ret;
 
        if (!vdev) {
                RTE_LOG(ERR, VDPA, "Invalid device: %s.\n",
@@ -449,8 +451,20 @@ static void cmd_device_stats_parsed(void *parsed_result, 
struct cmdline *cl,
        cmdline_printf(cl, "\nDevice %s:\n", res->bdf);
        for (; first <= last; first++) {
                memset(vport->stats, 0, sizeof(*vport->stats) * vport->stats_n);
-               if (rte_vdpa_get_stats(vport->dev, (int)first, vport->stats,
-                                       vport->stats_n) <= 0) {
+               ret = rte_vdpa_get_stats(vport->dev, (int)first, vport->stats,
+                                               vport->stats_n);
+               if (ret == 0) {
+                       /* VQ disabled. */
+                       if (vq_disabled == -1)
+                               vq_disabled = (int)first;
+                       continue;
+               }
+               if (vq_disabled != -1) {
+                       cmdline_printf(cl, "\tVirtq %d - %d disabled\n",
+                                      vq_disabled, (int)first - 1);
+                       vq_disabled = -1;
+               }
+               if (ret < 0) {
                        RTE_LOG(ERR, VDPA, "Failed to get vdpa queue statistics"
                                " for device %s qid %d.\n", res->bdf,
                                (int)first);
@@ -464,6 +478,9 @@ static void cmd_device_stats_parsed(void *parsed_result, 
struct cmdline *cl,
                                vport->stats[i].value);
                }
        }
+       if (vq_disabled != -1)
+               cmdline_printf(cl, "\tVirtq %d - %d disabled\n",
+                              vq_disabled, (int)first - 1);
 }
 
 cmdline_parse_token_string_t cmd_device_stats_ =
-- 
2.35.1