diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h index 18aade195884..6eb8f8ae76da 100644 --- a/include/linux/dma-direct.h +++ b/include/linux/dma-direct.h @@ -103,6 +103,10 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size, if (addr == DMA_MAPPING_ERROR) return false; + + if (!dev->dma_mask) + return false; + if (is_ram && !IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) && min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn))) return false; diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 559461a826ba..389fc0faaa47 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -148,9 +148,6 @@ dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, BUG_ON(!valid_dma_direction(dir)); - if (WARN_ON_ONCE(!dev->dma_mask)) - return DMA_MAPPING_ERROR; - if (dma_map_direct(dev, ops) || arch_dma_map_page_direct(dev, page_to_phys(page) + offset + size)) addr = dma_direct_map_page(dev, page, offset, size, dir, attrs); @@ -185,9 +182,6 @@ static int __dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, BUG_ON(!valid_dma_direction(dir)); - if (WARN_ON_ONCE(!dev->dma_mask)) - return 0; - if (dma_map_direct(dev, ops) || arch_dma_map_sg_direct(dev, sg, nents)) ents = dma_direct_map_sg(dev, sg, nents, dir, attrs); @@ -293,9 +287,6 @@ dma_addr_t dma_map_resource(struct device *dev, phys_addr_t phys_addr, BUG_ON(!valid_dma_direction(dir)); - if (WARN_ON_ONCE(!dev->dma_mask)) - return DMA_MAPPING_ERROR; - if (dma_map_direct(dev, ops)) addr = dma_direct_map_resource(dev, phys_addr, size, dir, attrs); else if (ops->map_resource)