228 	struct gntdev_dmabuf_attachment *gntdev_dmabuf_attach;  in dmabuf_exp_ops_attach()  local
230 	gntdev_dmabuf_attach = kzalloc(sizeof(*gntdev_dmabuf_attach),  in dmabuf_exp_ops_attach()
232 	if (!gntdev_dmabuf_attach)  in dmabuf_exp_ops_attach()
235 	gntdev_dmabuf_attach->dir = DMA_NONE;  in dmabuf_exp_ops_attach()
236 	attach->priv = gntdev_dmabuf_attach;  in dmabuf_exp_ops_attach()
243 	struct gntdev_dmabuf_attachment *gntdev_dmabuf_attach = attach->priv;  in dmabuf_exp_ops_detach()  local
245 	if (gntdev_dmabuf_attach) {  in dmabuf_exp_ops_detach()
246 		struct sg_table *sgt = gntdev_dmabuf_attach->sgt;  in dmabuf_exp_ops_detach()
249 			if (gntdev_dmabuf_attach->dir != DMA_NONE)  in dmabuf_exp_ops_detach()
251 						  gntdev_dmabuf_attach->dir,  in dmabuf_exp_ops_detach()
257 		kfree(gntdev_dmabuf_attach);  in dmabuf_exp_ops_detach()
266 	struct gntdev_dmabuf_attachment *gntdev_dmabuf_attach = attach->priv;  in dmabuf_exp_ops_map_dma_buf()  local
273 	if (dir == DMA_NONE || !gntdev_dmabuf_attach)  in dmabuf_exp_ops_map_dma_buf()
277 	if (gntdev_dmabuf_attach->dir == dir)  in dmabuf_exp_ops_map_dma_buf()
278 		return gntdev_dmabuf_attach->sgt;  in dmabuf_exp_ops_map_dma_buf()
284 	if (gntdev_dmabuf_attach->dir != DMA_NONE)  in dmabuf_exp_ops_map_dma_buf()
296 			gntdev_dmabuf_attach->sgt = sgt;  in dmabuf_exp_ops_map_dma_buf()
297 			gntdev_dmabuf_attach->dir = dir;  in dmabuf_exp_ops_map_dma_buf()