[intel-tdx:guest-filter-upstream 7/31] drivers/base/da_firmware.c:133:9: warning: 'strncpy' specified bound 64 equals destination size

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

tree:   https://github.com/intel/tdx.git guest-filter-upstream
head:   fd61f2d2a82f5c0c284fa3f074bae5016c39e7bc
commit: 2918c8a83642b317e92706dcb7ee6ee4443f3266 [7/31] driver core: Add command line option to update device authorization list
config: arm-cerfcube_defconfig (https://download.01.org/0day-ci/archive/20230207/202302072357.ecVSWGbC-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel/tdx/commit/2918c8a83642b317e92706dcb7ee6ee4443f3266
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest-filter-upstream
        git checkout 2918c8a83642b317e92706dcb7ee6ee4443f3266
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/base/

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

All warnings (new ones prefixed by >>):

   drivers/base/da_firmware.c:166:8: warning: no previous prototype for 'parse_firmware_devices' [-Wmissing-prototypes]
     166 | size_t parse_firmware_devices(struct da_bus_node *node, void *data)
         |        ^~~~~~~~~~~~~~~~~~~~~~
   drivers/base/da_firmware.c: In function 'parse_cmdline_data':
   drivers/base/da_firmware.c:377:25: warning: variable 'ids' set but not used [-Wunused-but-set-variable]
     377 |         char *k, *bus, *ids;
         |                         ^~~
   drivers/base/da_firmware.c: In function 'alloc_bus_node':
>> drivers/base/da_firmware.c:133:9: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
     133 |         strncpy(node->name, bus, NAME_LEN);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/strncpy +133 drivers/base/da_firmware.c

304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  123  
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  124  /* Allocate DA firmware bus node and initialize it based on struct da_bus_hdr */
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  125  static struct da_bus_node *alloc_bus_node(char *bus, u32 count)
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  126  {
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  127  	struct da_bus_node *node;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  128  
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  129  	node = kzalloc(sizeof(*node), GFP_KERNEL);
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  130  	if (!node)
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  131  		return NULL;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  132  
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22 @133  	strncpy(node->name, bus, NAME_LEN);
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  134  	node->count = count;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  135  
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  136  	if (!strncmp(node->name, "pci", 3)) {
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  137  		node->match_device = pci_match_device;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  138  		node->print_devices = pci_print_devices;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  139  	} else {
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  140  		node->match_device = bus_match_device;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  141  		node->print_devices = bus_print_devices;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  142  	}
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  143  
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  144  	return node;
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  145  }
304ef1a77b5f51 Kuppuswamy Sathyanarayanan 2022-12-22  146  

:::::: The code at line 133 was first introduced by commit
:::::: 304ef1a77b5f5171d3e3ceb4d315ac79b135ab92 driver core: Add support to parse device authorize firmware

:::::: TO: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
:::::: CC: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

-- 
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https://github.com/intel/lkp-tests