Commit 9e91fdb3 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Jens Axboe
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swiotlb: fix map_sg failure handling 



sg list elements might not be continuous.

Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 24c31eed

lib/swiotlb.c

+1 −1
Original line number Diff line number Diff line
@@ -696,7 +696,7 @@ swiotlb_map_sg(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);

				swiotlb_unmap_sg(hwdev, sg - i, i, dir);

				swiotlb_unmap_sg(hwdev, sgl, i, dir);

				sgl[0].dma_length = 0;

				return 0;

			}