vdpa: harden the error path if get_iova_range failed

We should stop if the GET_IOVA_RANGE ioctl failed.

Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221224114848.3062-3-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index b6e1e84ed2110177097d80f3ef0b4b2288dd4f0f..1a13a34d35c0577bf0efb221c8b800decfcd144f 100644 (file)
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -805,7 +805,13 @@ 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;