vhost_vdpa_map() should remove the iotlb entry just added
if the corresponding mapping fails to set up properly.

Fixes: 4c8cf31885f6 ("vhost: introduce vDPA-based backend")
Signed-off-by: Si-Wei Liu <redacted>
---
  drivers/vhost/vdpa.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 796fe97..0f27919 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c

@@ -565,6 +565,9 @@ static int vhost_vdpa_map(struct vhost_vdpa *v,
  			      perm_to_iommu_flags(perm));
  	}
  
+	if (r)
+		vhost_iotlb_del_range(dev->iotlb, iova, iova + size - 1);
+
  	return r;
  }