diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index 6dbc43b414ca..dc9d665d7365 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -187,7 +187,7 @@ attach_out:
 	device_attach_pasid_table(info, pasid_table);
 
 	if (!ecap_coherent(info->iommu->ecap))
-		clflush_cache_range(pasid_table->table, size);
+		clflush_cache_range(pasid_table->table, (1 << order) * PAGE_SIZE);
 
 	return 0;
 }