Hi,

I love your patch! Perhaps something to improve:

[auto build test WARNING on wireless-drivers-next/master]
[also build test WARNING on wireless-drivers/master sparc-next/master v5.8-rc2 next-20200625]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/matthias-bgg-kernel-org/brcmfmac-Transform-compatible-string-for-FW-loading/20200626-001324
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git master
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

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

All warnings (new ones prefixed by >>):

   drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c: In function 'brcmf_of_probe':
>> drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c:35:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
      35 |   strncpy(board_type, tmp, strlen(tmp));
         |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/strncpy +35 drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c

    14	
    15	void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
    16			    struct brcmf_mp_device *settings)
    17	{
    18		struct brcmfmac_sdio_pd *sdio = &settings->bus.sdio;
    19		struct device_node *root, *np = dev->of_node;
    20		int irq;
    21		u32 irqf;
    22		u32 val;
    23	
    24		/* Set board-type to the first string of the machine compatible prop */
    25		root = of_find_node_by_path("/");
    26		if (root) {
    27			int i;
    28			char *board_type;
    29			const char *tmp;
    30	
    31			of_property_read_string_index(root, "compatible", 0, &tmp);
    32	
    33			/* get rid of '/' in the compatible string to be able to find the FW */
    34			board_type = devm_kzalloc(dev, strlen(tmp), GFP_KERNEL);
  > 35			strncpy(board_type, tmp, strlen(tmp));

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