Re: [PATCH v3 2/3] Bluetooth: qca: Expand firmware-name to load specific nvm and rampatch

[kernel test robot]

Hi Cheng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on c245a7a79602ccbee780c004c1e4abcda66aec32]

url:    https://github.com/intel-lab-lkp/linux/commits/Cheng-Jiang/dt-bindings-net-bluetooth-qca-Expand-firmware-name-property/20241205-182449
base:   c245a7a79602ccbee780c004c1e4abcda66aec32
patch link:    https://lore.kernel.org/r/20241205102213.1281865-3-quic_chejiang%40quicinc.com
patch subject: [PATCH v3 2/3] Bluetooth: qca: Expand firmware-name to load specific nvm and rampatch
config: arm-randconfig-002-20241205 (https://download.01.org/0day-ci/archive/20241205/202412052157.4fOQCv3u-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241205/202412052157.4fOQCv3u-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412052157.4fOQCv3u-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   drivers/bluetooth/btqca.c: In function 'qca_get_nvm_name_by_board':
>> drivers/bluetooth/btqca.c:775:21: warning: variable 'variant' set but not used [-Wunused-but-set-variable]
     775 |         const char *variant;
         |                     ^~~~~~~
   drivers/bluetooth/btqca.c: In function 'qca_get_alt_nvm_path.constprop':
>> drivers/bluetooth/btqca.c:288:45: warning: '.bin' directive output may be truncated writing 4 bytes into a region of size between 1 and 64 [-Wformat-truncation=]
     288 |         snprintf(fwname, sizeof(fwname), "%s.bin", fwname);
         |                                             ^~~~
   drivers/bluetooth/btqca.c:288:9: note: 'snprintf' output between 5 and 68 bytes into a destination of size 64
     288 |         snprintf(fwname, sizeof(fwname), "%s.bin", fwname);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/bluetooth/btqca.c:288:9: warning: 'snprintf' argument 4 overlaps destination object 'fwname' [-Wrestrict]
   drivers/bluetooth/btqca.c:277:14: note: destination object referenced by 'restrict'-qualified argument 1 was declared here
     277 |         char fwname[64];
         |              ^~~~~~


vim +/variant +775 drivers/bluetooth/btqca.c

   770	
   771	static void qca_get_nvm_name_by_board(char *fwname, size_t max_size,
   772			const char *firmware_name, struct qca_btsoc_version ver,
   773			enum qca_btsoc_type soc_type, u16 bid)
   774	{
 > 775		const char *variant;
   776	
   777		/* Set the variant to empty by default */
   778		variant = "";
   779		/* hsp gf chip */
   780		if (soc_type == QCA_WCN6855) {
   781			if ((le32_to_cpu(ver.soc_id) & QCA_HSP_GF_SOC_MASK) == QCA_HSP_GF_SOC_ID)
   782				variant = "g";
   783		}
   784	
   785		if (bid == 0x0)
   786			snprintf(fwname, max_size, "qca/%s.bin", firmware_name);
   787		else if (bid & 0xff00)
   788			snprintf(fwname, max_size, "qca/%s.b%x", firmware_name, bid);
   789		else
   790			snprintf(fwname, max_size, "qca/%s.b%02x", firmware_name, bid);
   791	}
   792	

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