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authorAlexander Duyck <alexander.h.duyck@intel.com>2016-11-10 07:05:31 -0500
committerKonrad Rzeszutek Wilk <konrad@kernel.org>2016-11-10 15:56:19 -0500
commitd29fa0cb7602fa3e96c9eee05e14d14d3e823c89 (patch)
tree1bf24161f9f990f0377bff4d3da4c609a8abaa29 /lib/swiotlb.c
parent0443fa003fa199f41bfbed3012f314d02c5b1f24 (diff)
downloadop-kernel-dev-d29fa0cb7602fa3e96c9eee05e14d14d3e823c89.zip
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swiotlb: Minor fix-ups for DMA_ATTR_SKIP_CPU_SYNC support
I am updating the paths so that instead of trying to pass "attr | DMA_ATTR_SKIP_CPU_SYNC" we instead just OR the value into attr and then pass it since attr will not be used after we make the unmap call. I realized there was one spot I had missed when I was applying the DMA attribute to the DMA mapping exception handling. This change corrects that. Finally it looks like there is a stray blank line at the end of the swiotlb_unmap_sg_attrs function that can be dropped. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
Diffstat (limited to 'lib/swiotlb.c')
-rw-r--r--lib/swiotlb.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 8e883c7..cb1b54e 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -781,8 +781,8 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
if (dma_capable(dev, dev_addr, size))
return dev_addr;
- swiotlb_tbl_unmap_single(dev, map, size, dir,
- attrs | DMA_ATTR_SKIP_CPU_SYNC);
+ attrs |= DMA_ATTR_SKIP_CPU_SYNC;
+ swiotlb_tbl_unmap_single(dev, map, size, dir, attrs);
return phys_to_dma(dev, io_tlb_overflow_buffer);
}
@@ -912,6 +912,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
/* Don't panic here, we expect map_sg users
to do proper error handling. */
swiotlb_full(hwdev, sg->length, dir, 0);
+ attrs |= DMA_ATTR_SKIP_CPU_SYNC;
swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir,
attrs);
sg_dma_len(sgl) = 0;
@@ -943,7 +944,6 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
for_each_sg(sgl, sg, nelems, i)
unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir,
attrs);
-
}
EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
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