On Wed, Jan 04, 2023 at 10:11:25AM +0200, Leon Romanovsky wrote: > -int mlx5_cmd_null_mkey(struct mlx5_core_dev *dev, u32 *null_mkey) > -{ > - u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {}; > - u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {}; > - int err; > + err = mlx5_cmd_exec_inout(dev->mdev, query_special_contexts, in, out); > + if (err) > + return err; > > - MLX5_SET(query_special_contexts_in, in, opcode, > - MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS); > - err = mlx5_cmd_exec_inout(dev, query_special_contexts, in, out); > - if (!err) > - *null_mkey = MLX5_GET(query_special_contexts_out, out, > - null_mkey); > - return err; > + if (MLX5_CAP_GEN(dev->mdev, dump_fill_mkey)) > + dev->mkeys.dump_fill_mkey = MLX5_GET(query_special_contexts_out, > + out, dump_fill_mkey); > + > + if (MLX5_CAP_GEN(dev->mdev, null_mkey)) > + dev->mkeys.null_mkey = cpu_to_be32( > + MLX5_GET(query_special_contexts_out, out, null_mkey)); > + > + if (MLX5_CAP_GEN(dev->mdev, terminate_scatter_list_mkey)) { > + dev->mkeys.terminate_scatter_list_mkey = > + cpu_to_be32(MLX5_GET(query_special_contexts_out, out, > + terminate_scatter_list_mkey)); > + return 0; > + } > + dev->mkeys.terminate_scatter_list_mkey = > + MLX5_TERMINATE_SCATTER_LIST_LKEY; This is already stored in the core dev, why are you recalculating it here? Jason