[PATCH v4 1/5] Bluetooth: btmtk: add the function to get the fw name

[kernel test robot]

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bluetooth/master]
[also build test WARNING on bluetooth-next/master linus/master v6.9-rc7 next-20240507]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/sean-wang-kernel-org/Bluetooth-btmtk-apply-the-common-btmtk_fw_get_filename/20240508-032333
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git master
patch link:    https://lore.kernel.org/r/965cd14922aea67e2750ff2c2ecad773f8ba485a.1715109394.git.sean.wang%40kernel.org
patch subject: [PATCH v4 1/5] Bluetooth: btmtk: add the function to get the fw name
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20240508/202405081456.v2MvcQ0P-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240508/202405081456.v2MvcQ0P-lkp@intel.com/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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405081456.v2MvcQ0P-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/bluetooth/btmtk.c: In function 'btmtk_fw_get_filename':
>> drivers/bluetooth/btmtk.c:115:35: warning: 'mediatek/BT_RAM_CODE_MT' directive output truncated writing 23 bytes into a region of size 8 [-Wformat-truncation=]
     115 |                          "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin",
         |                           ~~~~~~~~^~~~~~~~~~~~~~~
   drivers/bluetooth/btmtk.c:115:26: note: directive argument in the range [1, 256]
     115 |                          "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin",
         |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/bluetooth/btmtk.c:114:17: note: 'snprintf' output between 41 and 43 bytes into a destination of size 8
     114 |                 snprintf(buf, sizeof(size),
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~
     115 |                          "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin",
         |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     116 |                          dev_id & 0xffff, (fw_ver & 0xff) + 1);
         |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +115 drivers/bluetooth/btmtk.c

   105	
   106	void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver,
   107				   u32 fw_flavor)
   108	{
   109		if (dev_id == 0x7925)
   110			snprintf(buf, size,
   111				 "mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
   112				 dev_id & 0xffff, dev_id & 0xffff, (fw_ver & 0xff) + 1);
   113		else if (dev_id == 0x7961 && fw_flavor)
   114			snprintf(buf, sizeof(size),
 > 115				 "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin",
   116				 dev_id & 0xffff, (fw_ver & 0xff) + 1);
   117		else
   118			snprintf(buf, size,
   119				 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
   120				 dev_id & 0xffff, (fw_ver & 0xff) + 1);
   121	}
   122	EXPORT_SYMBOL_GPL(btmtk_fw_get_filename);
   123	

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