--- f0fa7a1782d59771207a795a274456653735768b
+++ 7cd33f75a69c4c44360528bc44b00418cb1f29de
@@ -1688,6 +1688,7 @@ static void __unmap_single(struct amd_io
 			   size_t size,
 			   int dir)
 {
+	dma_addr_t flush_addr;
 	dma_addr_t i, start;
 	unsigned int pages;
 
@@ -1695,6 +1696,7 @@ static void __unmap_single(struct amd_io
 	    (dma_addr + size > dma_dom->aperture_size))
 		return;
 
+	flush_addr = dma_addr;
 	pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
 	dma_addr &= PAGE_MASK;
 	start = dma_addr;
@@ -1709,7 +1711,7 @@ static void __unmap_single(struct amd_io
 	dma_ops_free_addresses(dma_dom, dma_addr, pages);
 
 	if (amd_iommu_unmap_flush || dma_dom->need_flush) {
-		iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size);
+		iommu_flush_pages(iommu, dma_dom->domain.id, flush_addr, size);
 		dma_dom->need_flush = false;
 	}
 }