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parisc/ccio: remove the mapping_error dma_map_ops method 

The CCIO 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 18:59:50 +01:00
parent 06301c5e0a
commit 748c3c4d13
1 changed files with 1 additions and 9 deletions
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10
drivers/parisc/ccio-dma.c
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@ -110,8 +110,6 @@
#define CMD_TLB_DIRECT_WRITE 35 /* IO_COMMAND for I/O TLB Writes */
#define CMD_TLB_PURGE 33 /* IO_COMMAND to Purge I/O TLB entry */
#define CCIO_MAPPING_ERROR (~(dma_addr_t)0)
struct ioa_registers {
/* Runway Supervisory Set */
int32_t unused1[12];
@ -740,7 +738,7 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
BUG_ON(!dev);
ioc = GET_IOC(dev);
if (!ioc)
return CCIO_MAPPING_ERROR;
return DMA_MAPPING_ERROR;
BUG_ON(size <= 0);
@ -1021,11 +1019,6 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents);
}
static int ccio_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == CCIO_MAPPING_ERROR;
}
static const struct dma_map_ops ccio_ops = {
.dma_supported = ccio_dma_supported,
.alloc = ccio_alloc,
@ -1034,7 +1027,6 @@ static const struct dma_map_ops ccio_ops = {
.unmap_page = ccio_unmap_page,
.map_sg = ccio_map_sg,
.unmap_sg = ccio_unmap_sg,
.mapping_error = ccio_mapping_error,
};
#ifdef CONFIG_PROC_FS