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parisc/sba_iommu: remove the mapping_error dma_map_ops method 

The SBA iommu code already returns (~(dma_addr_t)0x0) on mapping
failures, so we can switch over to returning DMA_MAPPING_ERROR and let
the core dma-mapping code handle the rest.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2018-11-21 19:00:17 +01:00
parent 748c3c4d13
commit fb1b53f16c
1 changed files with 1 additions and 9 deletions
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10
drivers/parisc/sba_iommu.c
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@ -93,8 +93,6 @@
#define DEFAULT_DMA_HINT_REG 0
#define SBA_MAPPING_ERROR (~(dma_addr_t)0)
struct sba_device *sba_list;
EXPORT_SYMBOL_GPL(sba_list);
@ -725,7 +723,7 @@ sba_map_single(struct device *dev, void *addr, size_t size,
ioc = GET_IOC(dev);
if (!ioc)
return SBA_MAPPING_ERROR;
return DMA_MAPPING_ERROR;
/* save offset bits */
offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK;
@ -1080,11 +1078,6 @@ sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
}
static int sba_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == SBA_MAPPING_ERROR;
}
static const struct dma_map_ops sba_ops = {
.dma_supported = sba_dma_supported,
.alloc = sba_alloc,
@ -1093,7 +1086,6 @@ static const struct dma_map_ops sba_ops = {
.unmap_page = sba_unmap_page,
.map_sg = sba_map_sg,
.unmap_sg = sba_unmap_sg,
.mapping_error = sba_mapping_error,
};