diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 215a3197e626..0cbcd3fc3e7e 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -370,34 +370,6 @@ static int iommu_dma_deferred_attach(struct device *dev,
 	return 0;
 }
 
-/*
- * Should be called prior to using dma-apis
- */
-int iommu_dma_reserve_iova(struct device *dev, dma_addr_t base,
-			   u64 size)
-{
-	struct iommu_domain *domain;
-	struct iommu_dma_cookie *cookie;
-	struct iova_domain *iovad;
-	unsigned long pfn_lo, pfn_hi;
-
-	domain = iommu_get_domain_for_dev(dev);
-	if (!domain || !domain->iova_cookie)
-		return -EINVAL;
-
-	cookie = domain->iova_cookie;
-	iovad = &cookie->iovad;
-
-	/* iova will be freed automatically by put_iova_domain() */
-	pfn_lo = iova_pfn(iovad, base);
-	pfn_hi = iova_pfn(iovad, base + size - 1);
-	if (!reserve_iova(iovad, pfn_lo, pfn_hi))
-		return -EINVAL;
-
-	return 0;
-}
-EXPORT_SYMBOL(iommu_dma_reserve_iova);
-
 /**
  * dma_info_to_prot - Translate DMA API directions and attributes to IOMMU API
  *                    page flags.
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 79eef7cf9013..2112f21f73d8 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -37,9 +37,6 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc,
 
 void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);
 
-int iommu_dma_reserve_iova(struct device *dev, dma_addr_t base,
-			   u64 size);
-
 #else /* CONFIG_IOMMU_DMA */
 
 struct iommu_domain;
@@ -81,11 +78,5 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he
 {
 }
 
-static inline int iommu_dma_reserve_iova(struct device *dev, dma_addr_t base,
-					 u64 size)
-{
-	return -ENODEV;
-}
-
 #endif	/* CONFIG_IOMMU_DMA */
 #endif	/* __DMA_IOMMU_H */