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| author | Dan Williams <dan.j.williams@intel.com> | 2016-01-10 07:53:55 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-01-10 07:53:55 -0800 |
| commit | 8b63b6bfc1a551acf154061699028c7032d7890c (patch) | |
| tree | 16882e9bc9e35eacb870a6d8a71617e579c4ffdc /drivers/parisc/iommu-helpers.h | |
| parent | e07ecd76d4db7bda1e9495395b2110a3fe28845a (diff) | |
| parent | 55f5560d8c18fe33fc169f8d244a9247dcac7612 (diff) | |
| download | linux-8b63b6bfc1a551acf154061699028c7032d7890c.tar.bz2 | |
Merge branch 'for-4.5/block-dax' into for-4.5/libnvdimm
Diffstat (limited to 'drivers/parisc/iommu-helpers.h')
| -rw-r--r-- | drivers/parisc/iommu-helpers.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/parisc/iommu-helpers.h b/drivers/parisc/iommu-helpers.h index 761e77bfce5d..e56f1569f6c3 100644 --- a/drivers/parisc/iommu-helpers.h +++ b/drivers/parisc/iommu-helpers.h @@ -104,7 +104,11 @@ iommu_coalesce_chunks(struct ioc *ioc, struct device *dev, struct scatterlist *contig_sg; /* contig chunk head */ unsigned long dma_offset, dma_len; /* start/len of DMA stream */ unsigned int n_mappings = 0; - unsigned int max_seg_size = dma_get_max_seg_size(dev); + unsigned int max_seg_size = min(dma_get_max_seg_size(dev), + (unsigned)DMA_CHUNK_SIZE); + unsigned int max_seg_boundary = dma_get_seg_boundary(dev) + 1; + if (max_seg_boundary) /* check if the addition above didn't overflow */ + max_seg_size = min(max_seg_size, max_seg_boundary); while (nents > 0) { @@ -138,14 +142,11 @@ iommu_coalesce_chunks(struct ioc *ioc, struct device *dev, /* ** First make sure current dma stream won't - ** exceed DMA_CHUNK_SIZE if we coalesce the + ** exceed max_seg_size if we coalesce the ** next entry. */ - if(unlikely(ALIGN(dma_len + dma_offset + startsg->length, - IOVP_SIZE) > DMA_CHUNK_SIZE)) - break; - - if (startsg->length + dma_len > max_seg_size) + if (unlikely(ALIGN(dma_len + dma_offset + startsg->length, IOVP_SIZE) > + max_seg_size)) break; /* |