[Linaro-mm-sig] [RFC 1/2] dma-buf: Introduce dma buffer sharing mechanism

[Dave Airlie]

> +struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
> +                                               struct device *dev)
> +{
> +       struct dma_buf_attachment *attach;
> +       int ret;
> +
> +       BUG_ON(!dmabuf || !dev);
> +
> +       mutex_lock(&dmabuf->lock);
> +
> +       attach = kzalloc(sizeof(struct dma_buf_attachment), GFP_KERNEL);
> +       if (attach == NULL)
> +               goto err_alloc;
> +
> +       attach->dev = dev;
> +       if (dmabuf->ops->attach) {
> +               ret = dmabuf->ops->attach(dmabuf, dev, attach);
> +               if (!ret)
> +                       goto err_attach;
> +       }
> +       list_add(&attach->node, &dmabuf->attachments);
> +

I would assume at some point this needed at
attach->dmabuf = dmabuf;
added.

Dave.