[PATCH 12/24] arm64: remove the dummy_dma_ops mapping_error method

Christoph Hellwig
2018-11-22T14:03:08Z

Just return DMA_MAPPING_ERROR from __dummy_map_page and let the core
dma-mapping code handle the rest.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm64/mm/dma-mapping.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index a3ac26284845..fdc26ea5036c 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -282,7 +282,7 @@ static dma_addr_t __dummy_map_page(struct device *dev, struct page *page,
enum dma_data_direction dir,
unsigned long attrs)
{
- return 0;
+ return DMA_MAPPING_ERROR;
}

static void __dummy_unmap_page(struct device *dev, dma_addr_t dev_addr,
@@ -317,11 +317,6 @@ static void __dummy_sync_sg(struct device *dev,
{
}

-static int __dummy_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
-{
- return 1;
-}
-
static int __dummy_dma_supported(struct device *hwdev, u64 mask)
{
return 0;
@@ -339,7 +334,6 @@ const struct dma_map_ops dummy_dma_ops = {
.sync_single_for_device = __dummy_sync_single,
.sync_sg_for_cpu = __dummy_sync_sg,
.sync_sg_for_device = __dummy_sync_sg,
- .mapping_error = __dummy_mapping_error,
.dma_supported = __dummy_dma_supported,
};
EXPORT_SYMBOL(dummy_dma_ops);
--
2.19.1