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authorRicardo Ribalda <ricardo.ribalda@gmail.com>2015-04-29 09:00:47 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-30 11:31:10 -0300
commitba81c6ed3dd4717439940cd5f60b152ea924093d (patch)
tree9f423a79dd7212216b27cf368a5ec6e2d2812cbf /drivers/media/v4l2-core/videobuf2-vmalloc.c
parent60a471923869394a47c10262d080286eb01451b5 (diff)
[media] media/videobuf2-dma-vmalloc: Save output from dma_map_sg
dma_map_sg returns the number of areas mapped by the hardware, which could be different than the areas given as an input. The output must be saved to nent. Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-vmalloc.c')
-rw-r--r--drivers/media/v4l2-core/videobuf2-vmalloc.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-vmalloc.c b/drivers/media/v4l2-core/videobuf2-vmalloc.c
index 0ba40be21ebd..f6656fefc035 100644
--- a/drivers/media/v4l2-core/videobuf2-vmalloc.c
+++ b/drivers/media/v4l2-core/videobuf2-vmalloc.c
@@ -291,7 +291,6 @@ static struct sg_table *vb2_vmalloc_dmabuf_ops_map(
/* stealing dmabuf mutex to serialize map/unmap operations */
struct mutex *lock = &db_attach->dmabuf->lock;
struct sg_table *sgt;
- int ret;
mutex_lock(lock);
@@ -310,8 +309,9 @@ static struct sg_table *vb2_vmalloc_dmabuf_ops_map(
}
/* mapping to the client with new direction */
- ret = dma_map_sg(db_attach->dev, sgt->sgl, sgt->orig_nents, dma_dir);
- if (ret <= 0) {
+ sgt->nents = dma_map_sg(db_attach->dev, sgt->sgl, sgt->orig_nents,
+ dma_dir);
+ if (!sgt->nents) {
pr_err("failed to map scatterlist\n");
mutex_unlock(lock);
return ERR_PTR(-EIO);

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