424 	struct dma_buf_attachment *attach;  in dma_buf_attach()  local
430 	attach = kzalloc(sizeof(struct dma_buf_attachment), GFP_KERNEL);  in dma_buf_attach()
431 	if (attach == NULL)  in dma_buf_attach()
434 	attach->dev = dev;  in dma_buf_attach()
435 	attach->dmabuf = dmabuf;  in dma_buf_attach()
439 	if (dmabuf->ops->attach) {  in dma_buf_attach()
440 		ret = dmabuf->ops->attach(dmabuf, dev, attach);  in dma_buf_attach()
444 	list_add(&attach->node, &dmabuf->attachments);  in dma_buf_attach()
447 	return attach;  in dma_buf_attach()
450 	kfree(attach);  in dma_buf_attach()
463 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)  in dma_buf_detach()  argument
465 	if (WARN_ON(!dmabuf || !attach))  in dma_buf_detach()
469 	list_del(&attach->node);  in dma_buf_detach()
471 		dmabuf->ops->detach(dmabuf, attach);  in dma_buf_detach()
474 	kfree(attach);  in dma_buf_detach()
488 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,  in dma_buf_map_attachment()  argument
495 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment()
498 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);  in dma_buf_map_attachment()
515 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment()  argument
521 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment()
524 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,  in dma_buf_unmap_attachment()