diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index bd515be5b380e32ac224b55d5b9a2dfff26a15ef..16d33ac19db0f77837c30f44de044a3a46b9c558 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -371,7 +371,8 @@ static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
 	int ret;
 
 	spin_lock_irqsave(&dom->pgtlock, flags);
-	ret = dom->iop->map(dom->iop, iova, paddr, size, prot);
+	ret = dom->iop->map(dom->iop, iova, paddr & DMA_BIT_MASK(32),
+			    size, prot);
 	spin_unlock_irqrestore(&dom->pgtlock, flags);
 
 	return ret;