Re: [PATCH mt76 v2 1/4] wifi: mt76: mt7996: Add per-radio phy debugfs directories.

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

Hi Rory,

kernel test robot noticed the following build warnings:

[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main linus/master v6.15-rc5 next-20250506]
[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/Rory-Little/wifi-mt76-mt7996-Add-per-radio-phy-debugfs-directories/20250501-072345
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20250430232225.3943242-2-rory%40candelatech.com
patch subject: [PATCH mt76 v2 1/4] wifi: mt76: mt7996: Add per-radio phy debugfs directories.
config: openrisc-allyesconfig (https://download.01.org/0day-ci/archive/20250507/202505071352.R4Bb2GN1-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250507/202505071352.R4Bb2GN1-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505071352.R4Bb2GN1-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c: In function 'mt7996_init_debugfs':
>> drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c:851:52: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
     851 |         snprintf(fname, sizeof(fname), "radio_phy%d", phy->mt76->band_idx);
         |                                                    ^
   In function 'mt7996_init_radio_phy_debugfs',
       inlined from 'mt7996_init_debugfs' at drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c:900:9:
   drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c:851:9: note: 'snprintf' output between 11 and 13 bytes into a destination of size 12
     851 |         snprintf(fname, sizeof(fname), "radio_phy%d", phy->mt76->band_idx);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/snprintf +851 drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c

   841	
   842	DEFINE_DEBUGFS_ATTRIBUTE(fops_rf_regval, mt7996_rf_regval_get,
   843				 mt7996_rf_regval_set, "0x%08llx\n");
   844	
   845	static int
   846	mt7996_init_radio_phy_debugfs(struct mt7996_phy *phy)
   847	{
   848		struct dentry *dir;
   849		char fname[12];
   850	
 > 851		snprintf(fname, sizeof(fname), "radio_phy%d", phy->mt76->band_idx);
   852		dir = debugfs_create_dir(fname, phy->dev->debugfs_dir);
   853	
   854		if (IS_ERR_OR_NULL(dir))
   855			return -ENOMEM;
   856	
   857		phy->debugfs_dir = dir;
   858	
   859		return 0;
   860	}
   861	

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