diff options
| author |   Ricardo Ribalda <ricardo.ribalda@gmail.com> | 2015-04-29 09:00:46 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-30 11:29:06 -0300 |
| commit | 60a471923869394a47c10262d080286eb01451b5 (patch) | |
| tree | 8673d13d18f80c04b1cd5997f6b79526ff4b15a3 /drivers/media/v4l2-core | |
| parent | [media] media/videobuf2-dma-sg: Fix handling of sg_table structure (diff) | |
| download | linux-dev-60a471923869394a47c10262d080286eb01451b5.tar.xz linux-dev-60a471923869394a47c10262d080286eb01451b5.zip | |
[media] media/videobuf2-dma-contig: 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')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-dma-contig.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c index 620c4aa78881..369df95af5c7 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-contig.c +++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c @@ -299,7 +299,6 @@ static struct sg_table *vb2_dc_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); @@ -318,8 +317,9 @@ static struct sg_table *vb2_dc_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); |