555 	struct dma_buf_attachment *attach;  in dma_buf_attach()  local
561 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);  in dma_buf_attach()
562 	if (!attach)  in dma_buf_attach()
565 	attach->dev = dev;  in dma_buf_attach()
566 	attach->dmabuf = dmabuf;  in dma_buf_attach()
570 	if (dmabuf->ops->attach) {  in dma_buf_attach()
571 		ret = dmabuf->ops->attach(dmabuf, dev, attach);  in dma_buf_attach()
575 	list_add(&attach->node, &dmabuf->attachments);  in dma_buf_attach()
578 	return attach;  in dma_buf_attach()
581 	kfree(attach);  in dma_buf_attach()
595 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)  in dma_buf_detach()  argument
597 	if (WARN_ON(!dmabuf || !attach))  in dma_buf_detach()
601 	list_del(&attach->node);  in dma_buf_detach()
603 		dmabuf->ops->detach(dmabuf, attach);  in dma_buf_detach()
606 	kfree(attach);  in dma_buf_detach()
625 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,  in dma_buf_map_attachment()  argument
632 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment()
635 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);  in dma_buf_map_attachment()
653 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment()  argument
659 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment()
662 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,  in dma_buf_unmap_attachment()