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Diffstat (limited to 'drivers/iommu/dma-iommu.c')
-rw-r--r--drivers/iommu/dma-iommu.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 50ccc4f1ef81..b58f5a3311c3 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -859,6 +859,11 @@ static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
iommu_deferred_attach(dev, domain))
return DMA_MAPPING_ERROR;
+ /* If anyone ever wants this we'd need support in the IOVA allocator */
+ if (dev_WARN_ONCE(dev, dma_get_min_align_mask(dev) > iova_mask(iovad),
+ "Unsupported alignment constraint\n"))
+ return DMA_MAPPING_ERROR;
+
size = iova_align(iovad, size + iova_off);
iova = iommu_dma_alloc_iova(domain, size, dma_mask, dev);