vfio/spapr_tce: Skip unsetting already unset table

[linux-2.6-microblaze.git] / drivers / vfio / vfio_iommu_spapr_tce.c

diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index c424913..8dbb270 100644 (file)
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -1235,7 +1235,8 @@ static void tce_iommu_release_ownership_ddw(struct tce_container *container,
        }
 
        for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i)
-               table_group->ops->unset_window(table_group, i);
+               if (container->tables[i])
+                       table_group->ops->unset_window(table_group, i);
 
        table_group->ops->release_ownership(table_group);
 }