diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 9a4f05e5b23fa480e308d0b44373e6599ad82982..f2eb0bc419f8e0879eb7da8a477e9b79d8ccc75e 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1339,9 +1339,6 @@ int dmar_enable_qi(struct intel_iommu *iommu)
 		return -ENOMEM;
 	}
 
-	qi->free_head = qi->free_tail = 0;
-	qi->free_cnt = QI_LENGTH;
-
 	raw_spin_lock_init(&qi->q_lock);
 
 	__dmar_enable_qi(iommu);