[PATCH 2/2] vdpa: harden the error path if get_iova_range failed

[Longpeng(Mike)]

From: Longpeng <longpeng2@huawei.com>

We should stop if the GET_IOVA_RANGE ioctl failed.

Signed-off-by: Longpeng <longpeng2@huawei.com>
---
 net/vhost-vdpa.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index ffdc435d19..e65023d013 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -797,7 +797,13 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char 
*name,
         return queue_pairs;
     }
 
-    vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range);
+    r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range);
+    if (unlikely(r < 0)) {
+        error_setg(errp, "vhost-vdpa: get iova range failed: %s",
+                   strerror(-r));
+        goto err;
+    }
+
     if (opts->x_svq) {
         if (!vhost_vdpa_net_valid_svq_features(features, errp)) {
             goto err_svq;
-- 
2.23.0