From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 17 Oct 2007 08:06:18 +0000 (+0200)
Subject: swiotlb: fix map_sg failure handling
X-Git-Tag: v2.6.24-rc1~490^2~6
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e91fdb32d449a6b57f8236a793ae2f3df79b4d8;p=linux-2.6

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>
---

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index c419ecf334..752fd95323 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;
 			}