ERDMA_RES_TYPE_AH
dev->res_cb[ERDMA_RES_TYPE_AH].max_cap = dev->attrs.max_ah;
ret = erdma_alloc_idx(&dev->res_cb[ERDMA_RES_TYPE_AH]);
erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_AH], ah->ahn);
erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_AH], ah->ahn);