421 	struct dma_buf_attachment *attach;  in dma_buf_attach()  local
427 	attach = kzalloc(sizeof(struct dma_buf_attachment), GFP_KERNEL);  in dma_buf_attach()
428 	if (attach == NULL)  in dma_buf_attach()
431 	attach->dev = dev;  in dma_buf_attach()
432 	attach->dmabuf = dmabuf;  in dma_buf_attach()
436 	if (dmabuf->ops->attach) {  in dma_buf_attach()
437 		ret = dmabuf->ops->attach(dmabuf, dev, attach);  in dma_buf_attach()
441 	list_add(&attach->node, &dmabuf->attachments);  in dma_buf_attach()
444 	return attach;  in dma_buf_attach()
447 	kfree(attach);  in dma_buf_attach()
460 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)  in dma_buf_detach()  argument
462 	if (WARN_ON(!dmabuf || !attach))  in dma_buf_detach()
466 	list_del(&attach->node);  in dma_buf_detach()
468 		dmabuf->ops->detach(dmabuf, attach);  in dma_buf_detach()
471 	kfree(attach);  in dma_buf_detach()
485 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,  in dma_buf_map_attachment()  argument
492 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment()
495 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);  in dma_buf_map_attachment()
512 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment()  argument
518 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment()
521 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,  in dma_buf_unmap_attachment()