[leon-rdma:auxbus 3/12] drivers/net/ethernet/mellanox/mlx5/core/main.c:239:74: sparse: sparse: cast truncates bits from constant value (50a becomes a)

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git auxbus
head:   ce7e1f65f7922627b386d5f30b1bbd54a456687b
commit: 7fcfbdeefb9326a73e4de5024aef37b9e36ff8aa [3/12] net/mlx5: Properly convey driver version to firmware
config: sparc64-randconfig-s032-20201103 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-76-gf680124b-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git/commit/?id=7fcfbdeefb9326a73e4de5024aef37b9e36ff8aa
        git remote add leon-rdma https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git
        git fetch --no-tags leon-rdma auxbus
        git checkout 7fcfbdeefb9326a73e4de5024aef37b9e36ff8aa
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/net/ethernet/mellanox/mlx5/core/main.c:239:74: sparse: sparse: cast truncates bits from constant value (50a becomes a)

vim +239 drivers/net/ethernet/mellanox/mlx5/core/main.c

   211	
   212	static void mlx5_set_driver_version(struct mlx5_core_dev *dev)
   213	{
   214		int driver_ver_sz = MLX5_FLD_SZ_BYTES(set_driver_version_in,
   215						      driver_version);
   216		u8 in[MLX5_ST_SZ_BYTES(set_driver_version_in)] = {};
   217		int remaining_size = driver_ver_sz;
   218		char *string;
   219	
   220		if (!MLX5_CAP_GEN(dev, driver_version))
   221			return;
   222	
   223		string = MLX5_ADDR_OF(set_driver_version_in, in, driver_version);
   224	
   225		strncpy(string, "Linux", remaining_size);
   226	
   227		remaining_size = max_t(int, 0, driver_ver_sz - strlen(string));
   228		strncat(string, ",", remaining_size);
   229	
   230		remaining_size = max_t(int, 0, driver_ver_sz - strlen(string));
   231		strncat(string, DRIVER_NAME, remaining_size);
   232	
   233		remaining_size = max_t(int, 0, driver_ver_sz - strlen(string));
   234		strncat(string, ",", remaining_size);
   235	
   236		remaining_size = max_t(int, 0, driver_ver_sz - strlen(string));
   237	
   238		snprintf(string + strlen(string), remaining_size, "%u.%u.%u",
 > 239			 (u8)(LINUX_VERSION_CODE >> 16), (u8)(LINUX_VERSION_CODE >> 8),
   240			 (u16)(LINUX_VERSION_CODE & 0xff));
   241	
   242		/*Send the command*/
   243		MLX5_SET(set_driver_version_in, in, opcode,
   244			 MLX5_CMD_OP_SET_DRIVER_VERSION);
   245	
   246		mlx5_cmd_exec_in(dev, set_driver_version, in);
   247	}
   248	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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