On Wed, Feb 10, 2021 at 11:51:51AM +0300, Dan Carpenter wrote:
> Hello Vlad Buslov,
>
> The patch 84ae9c1f29c0: "net/mlx5e: E-Switch, Maintain vhca_id to
> vport_num mapping" from Sep 23, 2020, leads to the following static
> checker warning:
>
> drivers/net/ethernet/mellanox/mlx5/core/vport.c:1170 mlx5_vport_get_other_func_cap()
> warn: odd binop '0x0 & 0x1'
>
> drivers/net/ethernet/mellanox/mlx5/core/vport.c
> 1168 int mlx5_vport_get_other_func_cap(struct mlx5_core_dev *dev, u16 function_id, void *out)
> 1169 {
> 1170 u16 opmod = (MLX5_CAP_GENERAL << 1) | (HCA_CAP_OPMOD_GET_MAX & 0x01);
>
> HCA_CAP_OPMOD_GET_MAX is zero. The 0x01 is a magical number.
>
> 1171 u8 in[MLX5_ST_SZ_BYTES(query_hca_cap_in)] = {};
> 1172
> 1173 MLX5_SET(query_hca_cap_in, in, opcode, MLX5_CMD_OP_QUERY_HCA_CAP);
> 1174 MLX5_SET(query_hca_cap_in, in, op_mod, opmod);
> 1175 MLX5_SET(query_hca_cap_in, in, function_id, function_id);
> 1176 MLX5_SET(query_hca_cap_in, in, other_function, true);
> 1177 return mlx5_cmd_exec_inout(dev, query_hca_cap, in, out);
> 1178 }
Dan,
I'm running smatch which is based on 6193b3b71beb ("extra: fix some error pointer handling")
and I don't see this error. Should I run something special?
Thanks
>
> regards,
> dan carpenter
