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swiotlb-xen: fix error code returned by xen_swiotlb_map_sg_attrs

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map_sg returns the number of elements mapped, not a dma_addr_t.
In case of error return 0, not DMA_ERROR_CODE.

Signed-off-by: Stefano Stabellini <[email protected]>
This commit is contained in:
Stefano Stabellini 2013-10-29 00:37:37 +00:00
commit 15177608c7
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/swiotlb-xen.c
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@ -548,7 +548,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
xen_swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir,
attrs);
sg_dma_len(sgl) = 0;
return DMA_ERROR_CODE;
return 0;
}
sg->dma_address = xen_phys_to_bus(map);
} else {