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iommu/amd: Remove map_sg_no_iommu()
This function was intended as a fall-back if the map_sg function is called for a device not mapped by the IOMMU. Since the AMD IOMMU driver uses per-device dma_ops this can never happen. So this function isn't needed anymore. Reviewed-by: Shuah Khan <shuahkhan@gmail.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
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1 changed files with 1 additions and 21 deletions
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@ -2841,24 +2841,6 @@ static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
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spin_unlock_irqrestore(&domain->lock, flags);
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}
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/*
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* This is a special map_sg function which is used if we should map a
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* device which is not handled by an AMD IOMMU in the system.
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*/
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static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist,
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int nelems, int dir)
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{
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struct scatterlist *s;
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int i;
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for_each_sg(sglist, s, nelems, i) {
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s->dma_address = (dma_addr_t)sg_phys(s);
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s->dma_length = s->length;
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}
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return nelems;
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}
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/*
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* The exported map_sg function for dma_ops (handles scatter-gather
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* lists).
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@ -2878,9 +2860,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
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INC_STATS_COUNTER(cnt_map_sg);
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domain = get_domain(dev);
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if (PTR_ERR(domain) == -EINVAL)
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return map_sg_no_iommu(dev, sglist, nelems, dir);
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else if (IS_ERR(domain))
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if (IS_ERR(domain))
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return 0;
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dma_mask = *dev->dma_mask;
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