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V4L/DVB: buf-dma-sg.c: don't assume nr_pages == sglen

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videobuf_pages_to_sg() and videobuf_vmalloc_to_sg() happen to create
a scatterlist element for every page.  However, this is not true for
bus addresses, so other functions shouldn't rely on the length of the
scatter list being equal to nr_pages.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Arnout Vandecappelle 2010-03-17 19:53:04 -03:00 committed by Mauro Carvalho Chehab
parent c06b062bea
commit fc7f8fd42c
1 changed files with 2 additions and 2 deletions
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4
drivers/media/video/videobuf-dma-sg.c
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@ -286,7 +286,7 @@ int videobuf_dma_unmap(struct videobuf_queue *q, struct videobuf_dmabuf *dma)
if (!dma->sglen)
return 0;
dma_unmap_sg(q->dev, dma->sglist, dma->nr_pages, dma->direction);
dma_unmap_sg(q->dev, dma->sglist, dma->sglen, dma->direction);
vfree(dma->sglist);
dma->sglist = NULL;
@ -537,7 +537,7 @@ static int __videobuf_sync(struct videobuf_queue *q,
MAGIC_CHECK(mem->dma.magic, MAGIC_DMABUF);
dma_sync_sg_for_cpu(q->dev, mem->dma.sglist,
mem->dma.nr_pages, mem->dma.direction);
mem->dma.sglen, mem->dma.direction);
return 0;
}