[microchip-ung-linux-upstream:v5.12-rc2.net-next.sparx5_switchdev 25/41] drivers/uio/uio_fireant_irqmux.c:264:3: warning: 'strncpy' specified bound 16 equals destination size

[microchip-ung-linux-upstream:v5.12-rc2.net-next.sparx5_switchdev 25/41] drivers/uio/uio_fireant_irqmux.c:264:3: warning: 'strncpy' specified bound 16 equals destination size

[kernel test robot]

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tree:   https://github.com/microchip-ung/linux-upstream.git v5.12-rc2.net-next.sparx5_switchdev
head:   c647e473e6ff8532c02ea3bd816aa477df3687f2
commit: 5c575d7626ed53e4ccf148d834dde04b91c29b77 [25/41] sparx5: Add IRQ muxing UIO driver [LOCAL]
config: nds32-allyesconfig (attached as .config)
compiler: nds32le-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/5c575d7626ed53e4ccf148d834dde04b91c29b77
        git remote add microchip-ung-linux-upstream https://github.com/microchip-ung/linux-upstream.git
        git fetch --no-tags microchip-ung-linux-upstream v5.12-rc2.net-next.sparx5_switchdev
        git checkout 5c575d7626ed53e4ccf148d834dde04b91c29b77
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 

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_fireant_irqmux_request_irqs',
       inlined from 'uio_fireant_irqmux_probe' at drivers/uio/uio_fireant_irqmux.c:304:8:
>> drivers/uio/uio_fireant_irqmux.c:264:3: warning: 'strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
     264 |   strncpy(priv->sirq[num].name, r->name, MAXNAMELEN);
         |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/strncpy +264 drivers/uio/uio_fireant_irqmux.c

   241	
   242	static int uio_fireant_irqmux_request_irqs(struct irqmux_platdata *priv)
   243	{
   244		struct platform_device *pdev = priv->pdev;
   245		int irq, num, max;
   246	
   247		priv->n_sirq = platform_irq_count(pdev);
   248		priv->sirq = devm_kzalloc(&pdev->dev,
   249					  sizeof(struct slave_irq)*priv->n_sirq,
   250					  GFP_KERNEL);
   251		if (!priv->sirq)
   252			return -ENOMEM;
   253	
   254		for (num = 0, max = priv->n_sirq; num < max; num++) {
   255			struct resource *r;
   256	
   257			r = platform_get_resource(pdev, IORESOURCE_IRQ, num);
   258			if (!r)
   259				return -ENXIO;
   260			irq = platform_get_irq(pdev, num);
   261			priv->sirq[num].index = num;
   262			priv->sirq[num].irq = irq;
   263			priv->sirq[num].priv = priv;
 > 264			strncpy(priv->sirq[num].name, r->name, MAXNAMELEN);
   265			if (irq <= 0) {
   266				dev_err(&pdev->dev, "failed to get IRQ %d\n", num);
   267				return irq;
   268			}
   269			if (num == 0) {
   270				priv->info.irq = irq;
   271				if (strcmp(r->name, "master")) {
   272					dev_err(&pdev->dev,
   273						"First irq must be 'master'\n");
   274					return -ENXIO;
   275				}
   276			} else {
   277				int ret = request_irq(irq, slave_irq, 0, r->name,
   278						      (void *) &priv->sirq[num]);
   279				if (ret < 0) {
   280					dev_err(&pdev->dev, "can not get IRQ %d\n",
   281						irq);
   282					return -ENXIO;
   283				}
   284			}
   285		}
   286	
   287		return 0;
   288	}
   289	

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

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