diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2016-11-10 13:05:31 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad@kernel.org> | 2016-11-10 21:56:19 +0100 |
| commit | d29fa0cb7602fa3e96c9eee05e14d14d3e823c89 (patch) | |
| tree | 1bf24161f9f990f0377bff4d3da4c609a8abaa29 /lib | |
| parent | swiotlb: Add support for DMA_ATTR_SKIP_CPU_SYNC (diff) | |
| download | linux-d29fa0cb7602fa3e96c9eee05e14d14d3e823c89.tar.xz linux-d29fa0cb7602fa3e96c9eee05e14d14d3e823c89.zip | |
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')
| -rw-r--r-- | lib/swiotlb.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 8e883c762728..cb1b54ee8527 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); |