Hi Sumit,
On Friday 27 January 2012 10:43:28 Sumit Semwal wrote:
> Some exporters may use DMA map/unmap APIs in dma-buf ops, which require
> enum dma_data_direction for both map and unmap operations.
>
> Thus, the unmap dma_buf_op also needs to have enum dma_data_direction as
> a parameter.
>
> Reported-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
> Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxx>
> ---
> drivers/base/dma-buf.c | 7 +++++--
> include/linux/dma-buf.h | 8 +++++---
> 2 files changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
> index 8afe2dd..c9a945f 100644
> --- a/drivers/base/dma-buf.c
> +++ b/drivers/base/dma-buf.c
> @@ -271,16 +271,19 @@ EXPORT_SYMBOL_GPL(dma_buf_map_attachment);
> * dma_buf_ops.
> * @attach: [in] attachment to unmap buffer from
> * @sg_table: [in] scatterlist info of the buffer to unmap
> + * @direction: [in] direction of DMA transfer
> *
> */
> void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
> - struct sg_table *sg_table)
> + struct sg_table *sg_table,
> + enum dma_data_direction direction)
> {
> if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
> return;
>
> mutex_lock(&attach->dmabuf->lock);
> - attach->dmabuf->ops->unmap_dma_buf(attach, sg_table);
> + attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,
> + direction);
> mutex_unlock(&attach->dmabuf->lock);
>
> }
> diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
> index 86f6241..847b026 100644
> --- a/include/linux/dma-buf.h
> +++ b/include/linux/dma-buf.h
> @@ -63,7 +63,8 @@ struct dma_buf_ops {
> struct sg_table * (*map_dma_buf)(struct dma_buf_attachment *,
> enum dma_data_direction);
> void (*unmap_dma_buf)(struct dma_buf_attachment *,
> - struct sg_table *);
> + struct sg_table *,
> + enum dma_data_direction);
> /* TODO: Add try_map_dma_buf version, to return immed with -EBUSY
> * if the call would block.
> */
> @@ -122,7 +123,8 @@ void dma_buf_put(struct dma_buf *dmabuf);
>
> struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *,
> enum dma_data_direction);
> -void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table
> *); +void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct
> sg_table *, + enum dma_data_direction);
> #else
>
> static inline struct dma_buf_attachment *dma_buf_attach(struct dma_buf
> *dmabuf, @@ -166,7 +168,7 @@ static inline struct sg_table
> *dma_buf_map_attachment( }
>
> static inline void dma_buf_unmap_attachment(struct dma_buf_attachment
> *attach, - struct sg_table *sg)
> + struct sg_table *sg, enum dma_data_direction write)
s/write/dir/ (or direction) ?
> {
> return;
> }
--
Regards,
Laurent Pinchart
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