[microchip-ung-linux-upstream:v5.10-webstax 65/88] drivers/uio/uio_sparx5_irqmux.c:247:3: warning: 'strncpy' specified bound 16 equals destination size

[microchip-ung-linux-upstream:v5.10-webstax 65/88] drivers/uio/uio_sparx5_irqmux.c:247:3: warning: 'strncpy' specified bound 16 equals destination size

[kernel test robot]

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tree:   https://github.com/microchip-ung/linux-upstream.git v5.10-webstax
head:   0c603c93d534e71ceee9485bfe1b0b75561efb0e
commit: b3739b5edd2763486c9791e8f25ba40b1f8b3423 [65/88] uio: vcoreiii: Add MSCC vcoreiii UIO drivers
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
        # https://github.com/microchip-ung/linux-upstream/commit/b3739b5edd2763486c9791e8f25ba40b1f8b3423
        git remote add microchip-ung-linux-upstream https://github.com/microchip-ung/linux-upstream.git
        git fetch --no-tags microchip-ung-linux-upstream v5.10-webstax
        git checkout b3739b5edd2763486c9791e8f25ba40b1f8b3423
        # 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 >>):

   In function 'uio_sparx5_irqmux_request_irqs',
       inlined from 'uio_sparx5_irqmux_probe' at drivers/uio/uio_sparx5_irqmux.c:293:8:
>> drivers/uio/uio_sparx5_irqmux.c:247:3: warning: 'strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
     247 |   strncpy(priv->sirq[num].name, r->name, MAXNAMELEN);
         |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/strncpy +247 drivers/uio/uio_sparx5_irqmux.c

   223	
   224	static int uio_sparx5_irqmux_request_irqs(struct irqmux_platdata *priv)
   225	{
   226		struct platform_device *pdev = priv->pdev;
   227		struct device *dev = &pdev->dev;
   228		int irq, num, max;
   229	
   230		priv->n_sirq = platform_irq_count(pdev);
   231		priv->sirq = devm_kzalloc(dev,
   232					  sizeof(struct slave_irq_data)*priv->n_sirq,
   233					  GFP_KERNEL);
   234		if (!priv->sirq)
   235			return -ENOMEM;
   236	
   237		for (num = 0, max = priv->n_sirq; num < max; num++) {
   238			struct resource *r;
   239	
   240			r = platform_get_resource(pdev, IORESOURCE_IRQ, num);
   241			if (!r)
   242				return -ENXIO;
   243			irq = platform_get_irq(pdev, num);
   244			priv->sirq[num].index = num;
   245			priv->sirq[num].irq = irq;
   246			priv->sirq[num].priv = priv;
 > 247			strncpy(priv->sirq[num].name, r->name, MAXNAMELEN);
   248			if (irq <= 0) {
   249				dev_err(dev, "failed to get IRQ %d\n", num);
   250				return irq;
   251			}
   252			if (num == 0) {
   253				priv->info.irq = irq;
   254				if (strcmp(r->name, "master")) {
   255					dev_err(dev, "First irq must be 'master'\n");
   256					return -ENXIO;
   257				}
   258			} else {
   259				int ret = request_irq(irq, slave_irq, 0, r->name,
   260						      (void *) &priv->sirq[num]);
   261				if (ret < 0) {
   262					dev_err(dev, "can not get IRQ %d\n", irq);
   263					return -ENXIO;
   264				}
   265			}
   266		}
   267	
   268		dev_info(dev, "Mapped %d irqs\n", priv->n_sirq);
   269		return 0;
   270	}
   271	

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

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