diff options
| author | Gurchetan Singh <gurchetansingh@chromium.org> | 2019-12-02 17:36:26 -0800 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-12-05 08:57:45 +0100 |
| commit | 17a7ce203490459cff14fb1c8f9a15d65fd1c544 (patch) | |
| tree | 075675993c6e66c8f411a552f1f4b75f40a876f5 /drivers/dma-buf/udmabuf.c | |
| parent | c1bbed668997268c9edccdc9db1bd1487d9e20b0 (diff) | |
udmabuf: separate out creating/destroying scatter-table
These are nice functions and can be re-used.
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-3-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/dma-buf/udmabuf.c')
| -rw-r--r-- | drivers/dma-buf/udmabuf.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index f0bf3ba7441e..0a610e09ae23 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -47,10 +47,10 @@ static int mmap_udmabuf(struct dma_buf *buf, struct vm_area_struct *vma) return 0; } -static struct sg_table *map_udmabuf(struct dma_buf_attachment *at, - enum dma_data_direction direction) +static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf, + enum dma_data_direction direction) { - struct udmabuf *ubuf = at->dmabuf->priv; + struct udmabuf *ubuf = buf->priv; struct sg_table *sg; int ret; @@ -62,7 +62,7 @@ static struct sg_table *map_udmabuf(struct dma_buf_attachment *at, GFP_KERNEL); if (ret < 0) goto err; - if (!dma_map_sg(at->dev, sg->sgl, sg->nents, direction)) { + if (!dma_map_sg(dev, sg->sgl, sg->nents, direction)) { ret = -EINVAL; goto err; } @@ -74,13 +74,25 @@ err: return ERR_PTR(ret); } +static void put_sg_table(struct device *dev, struct sg_table *sg, + enum dma_data_direction direction) +{ + dma_unmap_sg(dev, sg->sgl, sg->nents, direction); + sg_free_table(sg); + kfree(sg); +} + +static struct sg_table *map_udmabuf(struct dma_buf_attachment *at, + enum dma_data_direction direction) +{ + return get_sg_table(at->dev, at->dmabuf, direction); +} + static void unmap_udmabuf(struct dma_buf_attachment *at, struct sg_table *sg, enum dma_data_direction direction) { - dma_unmap_sg(at->dev, sg->sgl, sg->nents, direction); - sg_free_table(sg); - kfree(sg); + return put_sg_table(at->dev, sg, direction); } static void release_udmabuf(struct dma_buf *buf) |