[PATCH] vhost: also check queue state in the vhost_dev_set_log error routine

[Ni Xun]

From: Ni Xun <richardni@tencent.com>

When check queue state in the vhost_dev_set_log routine, it miss the error
routine check, this patch also check queue state in error case.

Fixes: 1e5a050f5798 ("check queue state in the vhost_dev_set_log
routine")

Signed-off-by: Ni Xun <richardni@tencent.com>
Reviewed-by: Zhigang Lu <tonnylu@tencent.com>
---
 hw/virtio/vhost.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index dd3263df56..6c41fa13e3 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -886,6 +886,10 @@ static int vhost_dev_set_log(struct vhost_dev *dev, bool 
enable_log)
 err_vq:
     for (; i >= 0; --i) {
         idx = dev->vhost_ops->vhost_get_vq_index(dev, dev->vq_index + i);
+        addr = virtio_queue_get_desc_addr(dev->vdev, idx);
+        if (!addr) {
+            continue;
+        }
         vhost_virtqueue_set_addr(dev, dev->vqs + i, idx,
                                  dev->log_enabled);
     }
-- 
2.25.0