[PATCH] swiotlb: fix map_sg failure handling

[FUJITA Tomonori]

sg list elements might not be continuous.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
---
 lib/swiotlb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index c419ecf..752fd95 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -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;
 			}
-- 
1.5.2.4

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