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authorChristoph Hellwig <hch@lst.de>2018-11-21 18:52:35 +0100
committerChristoph Hellwig <hch@lst.de>2018-12-06 06:56:36 -0800
commitb0cbeae4944924640bf550b75487729a20204c14 (patch)
treead7ddcb65ac796861e1a9af8db84a8eb116bb2e1 /kernel/dma
parent42ee3cae0ed38b6c04038bf851ea2496da2135bb (diff)
downloadlinux-b0cbeae4944924640bf550b75487729a20204c14.tar.bz2
dma-direct: remove the mapping_error dma_map_ops method
The dma-direct 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>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/direct.c8
-rw-r--r--kernel/dma/swiotlb.c11
2 files changed, 6 insertions, 13 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index c49849bcced6..308f88a750c8 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -289,7 +289,7 @@ dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
dma_addr_t dma_addr = phys_to_dma(dev, phys);
if (!check_addr(dev, dma_addr, size, __func__))
- return DIRECT_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
dma_direct_sync_single_for_device(dev, dma_addr, size, dir);
@@ -336,11 +336,6 @@ int dma_direct_supported(struct device *dev, u64 mask)
return mask >= phys_to_dma(dev, min_mask);
}
-int dma_direct_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return dma_addr == DIRECT_MAPPING_ERROR;
-}
-
const struct dma_map_ops dma_direct_ops = {
.alloc = dma_direct_alloc,
.free = dma_direct_free,
@@ -359,7 +354,6 @@ const struct dma_map_ops dma_direct_ops = {
#endif
.get_required_mask = dma_direct_get_required_mask,
.dma_supported = dma_direct_supported,
- .mapping_error = dma_direct_mapping_error,
.cache_sync = arch_dma_cache_sync,
};
EXPORT_SYMBOL(dma_direct_ops);
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 045930e32c0e..ff1ce81bb623 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -631,21 +631,21 @@ static dma_addr_t swiotlb_bounce_page(struct device *dev, phys_addr_t *phys,
if (unlikely(swiotlb_force == SWIOTLB_NO_FORCE)) {
dev_warn_ratelimited(dev,
"Cannot do DMA to address %pa\n", phys);
- return DIRECT_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
}
/* Oh well, have to allocate and map a bounce buffer. */
*phys = swiotlb_tbl_map_single(dev, __phys_to_dma(dev, io_tlb_start),
*phys, size, dir, attrs);
if (*phys == SWIOTLB_MAP_ERROR)
- return DIRECT_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
/* Ensure that the address returned is DMA'ble */
dma_addr = __phys_to_dma(dev, *phys);
if (unlikely(!dma_capable(dev, dma_addr, size))) {
swiotlb_tbl_unmap_single(dev, *phys, size, dir,
attrs | DMA_ATTR_SKIP_CPU_SYNC);
- return DIRECT_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
}
return dma_addr;
@@ -680,7 +680,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
if (!dev_is_dma_coherent(dev) &&
(attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0 &&
- dev_addr != DIRECT_MAPPING_ERROR)
+ dev_addr != DMA_MAPPING_ERROR)
arch_sync_dma_for_device(dev, phys, size, dir);
return dev_addr;
@@ -789,7 +789,7 @@ swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nelems,
for_each_sg(sgl, sg, nelems, i) {
sg->dma_address = swiotlb_map_page(dev, sg_page(sg), sg->offset,
sg->length, dir, attrs);
- if (sg->dma_address == DIRECT_MAPPING_ERROR)
+ if (sg->dma_address == DMA_MAPPING_ERROR)
goto out_error;
sg_dma_len(sg) = sg->length;
}
@@ -869,7 +869,6 @@ swiotlb_dma_supported(struct device *hwdev, u64 mask)
}
const struct dma_map_ops swiotlb_dma_ops = {
- .mapping_error = dma_direct_mapping_error,
.alloc = dma_direct_alloc,
.free = dma_direct_free,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,