swiotlb: fix map_sg failure handling
sg list elements might not be continuous. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -696,7 +696,7 @@ swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
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/* Don't panic here, we expect map_sg users
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to do proper error handling. */
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swiotlb_full(hwdev, sg->length, dir, 0);
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swiotlb_unmap_sg(hwdev, sg - i, i, dir);
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swiotlb_unmap_sg(hwdev, sgl, i, dir);
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sgl[0].dma_length = 0;
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return 0;
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}
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