x86/pci-nommu: implement ->mapping_error (14a9aad7) · Commits · 戴 / test

arch/x86/kernel/pci-nommu.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -11,6 +11,8 @@
		#include <asm/iommu.h>
		#include <asm/dma.h>

		#define NOMMU_MAPPING_ERROR 0

		static int
		check_addr(char name, struct device hwdev, dma_addr_t bus, size_t size)
		{
		@@ -33,7 +35,7 @@ static dma_addr_t nommu_map_page(struct device dev, struct page page,
		dma_addr_t bus = page_to_phys(page) + offset;
		WARN_ON(size == 0);
		if (!check_addr("map_single", dev, bus, size))
		return DMA_ERROR_CODE;
		return NOMMU_MAPPING_ERROR;
		flush_write_buffers();
		return bus;
		}
		@@ -88,6 +90,11 @@ static void nommu_sync_sg_for_device(struct device *dev,
		flush_write_buffers();
		}

		static int nommu_mapping_error(struct device *dev, dma_addr_t dma_addr)
		{
		return dma_addr == NOMMU_MAPPING_ERROR;
		}

		const struct dma_map_ops nommu_dma_ops = {
		.alloc = dma_generic_alloc_coherent,
		.free = dma_generic_free_coherent,
		@@ -96,4 +103,5 @@ const struct dma_map_ops nommu_dma_ops = {
		.sync_single_for_device = nommu_sync_single_for_device,
		.sync_sg_for_device = nommu_sync_sg_for_device,
		.is_phys = 1,
		.mapping_error = nommu_mapping_error,
		};