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arm: implement ->mapping_error

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DMA_ERROR_CODE is going to go away, so don't rely on it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2017-05-22 10:53:03 +02:00
parent a760088b45
commit 9eef8b8cc2
4 changed files with 38 additions and 19 deletions
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13
arch/arm/common/dmabounce.c
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@@ -33,6 +33,7 @@
#include <linux/scatterlist.h>
#include <asm/cacheflush.h>
#include <asm/dma-iommu.h>
#undef STATS
@@ -256,7 +257,7 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size,
if (buf == NULL) {
dev_err(dev, "%s: unable to map unsafe buffer %p!\n",
__func__, ptr);
return DMA_ERROR_CODE;
return ARM_MAPPING_ERROR;
}
dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
@@ -326,7 +327,7 @@ static dma_addr_t dmabounce_map_page(struct device *dev, struct page *page,
ret = needs_bounce(dev, dma_addr, size);
if (ret < 0)
return DMA_ERROR_CODE;
return ARM_MAPPING_ERROR;
if (ret == 0) {
arm_dma_ops.sync_single_for_device(dev, dma_addr, size, dir);
@@ -335,7 +336,7 @@ static dma_addr_t dmabounce_map_page(struct device *dev, struct page *page,
if (PageHighMem(page)) {
dev_err(dev, "DMA buffer bouncing of HIGHMEM pages is not supported\n");
return DMA_ERROR_CODE;
return ARM_MAPPING_ERROR;
}
return map_single(dev, page_address(page) + offset, size, dir, attrs);
@@ -452,6 +453,11 @@ static int dmabounce_set_mask(struct device *dev, u64 dma_mask)
return arm_dma_ops.set_dma_mask(dev, dma_mask);
}
static int dmabounce_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return arm_dma_ops.mapping_error(dev, dma_addr);
}
static const struct dma_map_ops dmabounce_ops = {
.alloc = arm_dma_alloc,
.free = arm_dma_free,
@@ -466,6 +472,7 @@ static const struct dma_map_ops dmabounce_ops = {
.sync_sg_for_cpu = arm_dma_sync_sg_for_cpu,
.sync_sg_for_device = arm_dma_sync_sg_for_device,
.set_dma_mask = dmabounce_set_mask,
.mapping_error = dmabounce_mapping_error,
};
static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev,