tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 581cb3a26baf846ee9636214afaa5333919875b1 commit: 2132b71f78d207b63974fc7d6eced9c5e886c405 net/mlx5e: Advertise globaly supported FEC modes config: powerpc-randconfig-m031-20200911 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; New smatch warnings: drivers/net/ethernet/mellanox/mlx5/core/en/port.c:453 mlx5e_fec_in_caps() warn: signedness bug returning '(-95)' # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2132b71f78d207b63974fc7d6eced9c5e886c405 vim +453 drivers/net/ethernet/mellanox/mlx5/core/en/port.c 2132b71f78d207 Aya Levin 2020-02-11 444 bool mlx5e_fec_in_caps(struct mlx5_core_dev *dev, int fec_policy) ^^^^ 2095b264147753 Shay Agroskin 2018-10-10 445 { 2095b264147753 Shay Agroskin 2018-10-10 446 u32 out[MLX5_ST_SZ_DW(pplm_reg)] = {}; 2095b264147753 Shay Agroskin 2018-10-10 447 u32 in[MLX5_ST_SZ_DW(pplm_reg)] = {}; 2095b264147753 Shay Agroskin 2018-10-10 448 int sz = MLX5_ST_SZ_BYTES(pplm_reg); 2095b264147753 Shay Agroskin 2018-10-10 449 int err; 2132b71f78d207 Aya Levin 2020-02-11 450 int i; 2095b264147753 Shay Agroskin 2018-10-10 451 2095b264147753 Shay Agroskin 2018-10-10 452 if (!MLX5_CAP_GEN(dev, pcam_reg)) 2095b264147753 Shay Agroskin 2018-10-10 @453 return -EOPNOTSUPP; ^^^^^^^^^^^^^^^^^^ 2095b264147753 Shay Agroskin 2018-10-10 454 2095b264147753 Shay Agroskin 2018-10-10 455 if (!MLX5_CAP_PCAM_REG(dev, pplm)) 2095b264147753 Shay Agroskin 2018-10-10 456 return -EOPNOTSUPP; ^^^^^^^^^^^^^^^^^^ These become "return true;" 2095b264147753 Shay Agroskin 2018-10-10 457 2095b264147753 Shay Agroskin 2018-10-10 458 MLX5_SET(pplm_reg, in, local_port, 1); 2095b264147753 Shay Agroskin 2018-10-10 459 err = mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPLM, 0, 0); 2095b264147753 Shay Agroskin 2018-10-10 460 if (err) 2132b71f78d207 Aya Levin 2020-02-11 461 return false; 2095b264147753 Shay Agroskin 2018-10-10 462 2132b71f78d207 Aya Levin 2020-02-11 463 for (i = 0; i < MLX5E_FEC_SUPPORTED_SPEEDS; i++) { 2132b71f78d207 Aya Levin 2020-02-11 464 u8 fec_caps; 2095b264147753 Shay Agroskin 2018-10-10 465 2132b71f78d207 Aya Levin 2020-02-11 466 mlx5e_get_fec_cap_field(out, &fec_caps, fec_supported_speeds[i]); 2132b71f78d207 Aya Levin 2020-02-11 467 if (fec_caps & fec_policy) 2132b71f78d207 Aya Levin 2020-02-11 468 return true; 2132b71f78d207 Aya Levin 2020-02-11 469 } 2132b71f78d207 Aya Levin 2020-02-11 470 return false; 2095b264147753 Shay Agroskin 2018-10-10 471 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org