On 23/06/20 8:22 pm, kernel test robot wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> Hi,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on a15a20acc980342c97d804c5fae1cfc0cd7712a9]
> 
> url:    https://github.com/0day-ci/linux/commits/Ajay-Kathat-microchip-com/wilc1000-move-out-of-staging/20200623-190333
> base:    a15a20acc980342c97d804c5fae1cfc0cd7712a9
> config: ia64-allmodconfig (attached as .config)
> compiler: ia64-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=ia64
> 
> 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/microchip/wilc1000/mon.c: In function 'wilc_wfi_init_mon_interface':
>>> drivers/net/wireless/microchip/wilc1000/mon.c:232:2: warning: 'strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
>      232 |  strncpy(wl->monitor_dev->name, name, IFNAMSIZ);
>          |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Though replacing 'strncpy' with 'strlcpy' will help to suppress this
warning but not sure if its true alarm because next line sets NULL
termination for string.
I agree 'strlcpy' is better candidate here and reduces one extra line.

> 
> vim +/strncpy +232 drivers/net/wireless/microchip/wilc1000/mon.c
> 
> daf8b5f14a7066 Ajay Singh 2020-06-23  216
> daf8b5f14a7066 Ajay Singh 2020-06-23  217  struct net_device *wilc_wfi_init_mon_interface(struct wilc *wl,
> daf8b5f14a7066 Ajay Singh 2020-06-23  218                                              const char *name,
> daf8b5f14a7066 Ajay Singh 2020-06-23  219                                              struct net_device *real_dev)
> daf8b5f14a7066 Ajay Singh 2020-06-23  220  {
> daf8b5f14a7066 Ajay Singh 2020-06-23  221       struct wilc_wfi_mon_priv *priv;
> daf8b5f14a7066 Ajay Singh 2020-06-23  222
> daf8b5f14a7066 Ajay Singh 2020-06-23  223       /* If monitor interface is already initialized, return it */
> daf8b5f14a7066 Ajay Singh 2020-06-23  224       if (wl->monitor_dev)
> daf8b5f14a7066 Ajay Singh 2020-06-23  225               return wl->monitor_dev;
> daf8b5f14a7066 Ajay Singh 2020-06-23  226
> daf8b5f14a7066 Ajay Singh 2020-06-23  227       wl->monitor_dev = alloc_etherdev(sizeof(struct wilc_wfi_mon_priv));
> daf8b5f14a7066 Ajay Singh 2020-06-23  228       if (!wl->monitor_dev)
> daf8b5f14a7066 Ajay Singh 2020-06-23  229               return NULL;
> daf8b5f14a7066 Ajay Singh 2020-06-23  230
> daf8b5f14a7066 Ajay Singh 2020-06-23  231       wl->monitor_dev->type = ARPHRD_IEEE80211_RADIOTAP;
> daf8b5f14a7066 Ajay Singh 2020-06-23 @232       strncpy(wl->monitor_dev->name, name, IFNAMSIZ);
> daf8b5f14a7066 Ajay Singh 2020-06-23  233       wl->monitor_dev->name[IFNAMSIZ - 1] = 0;
> daf8b5f14a7066 Ajay Singh 2020-06-23  234       wl->monitor_dev->netdev_ops = &wilc_wfi_netdev_ops;
> daf8b5f14a7066 Ajay Singh 2020-06-23  235       wl->monitor_dev->needs_free_netdev = true;
> daf8b5f14a7066 Ajay Singh 2020-06-23  236
> daf8b5f14a7066 Ajay Singh 2020-06-23  237       if (register_netdevice(wl->monitor_dev)) {
> daf8b5f14a7066 Ajay Singh 2020-06-23  238               netdev_err(real_dev, "register_netdevice failed\n");
> daf8b5f14a7066 Ajay Singh 2020-06-23  239               return NULL;
> daf8b5f14a7066 Ajay Singh 2020-06-23  240       }
> daf8b5f14a7066 Ajay Singh 2020-06-23  241       priv = netdev_priv(wl->monitor_dev);
> daf8b5f14a7066 Ajay Singh 2020-06-23  242       if (!priv)
> daf8b5f14a7066 Ajay Singh 2020-06-23  243               return NULL;
> daf8b5f14a7066 Ajay Singh 2020-06-23  244
> daf8b5f14a7066 Ajay Singh 2020-06-23  245       priv->real_ndev = real_dev;
> daf8b5f14a7066 Ajay Singh 2020-06-23  246
> daf8b5f14a7066 Ajay Singh 2020-06-23  247       return wl->monitor_dev;
> daf8b5f14a7066 Ajay Singh 2020-06-23  248  }
> daf8b5f14a7066 Ajay Singh 2020-06-23  249
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>