[intel-linux-intel-lts:5.4/yocto 413/1142] drivers/pci/controller/dwc/pcie-keembay.c:799:2: warning: 'strncpy' output truncated before terminating nul copying 2 bytes from a string of the same length

[intel-linux-intel-lts:5.4/yocto 413/1142] drivers/pci/controller/dwc/pcie-keembay.c:799:2: warning: 'strncpy' output truncated before terminating nul copying 2 bytes from a string of the same length

[kernel test robot]

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tree:   https://github.com/intel/linux-intel-lts.git 5.4/yocto
head:   eeb611e5394c56d45c5cc8f7dc484c9f19e93143
commit: 4d568c88671a6778939cb0d961566f95e6ce18ad [413/1142] PCI: keembay: Changes to support VPU PCIe driver
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/intel/linux-intel-lts/commit/4d568c88671a6778939cb0d961566f95e6ce18ad
        git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-linux-intel-lts 5.4/yocto
        git checkout 4d568c88671a6778939cb0d961566f95e6ce18ad
        # 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/pci/controller/dwc/pcie-keembay.c: In function 'keembay_pcie_probe':
>> drivers/pci/controller/dwc/pcie-keembay.c:799:2: warning: 'strncpy' output truncated before terminating nul copying 2 bytes from a string of the same length [-Wstringop-truncation]
     799 |  strncpy(pcie->stepping, "B0", strlen("B0"));
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/strncpy +799 drivers/pci/controller/dwc/pcie-keembay.c

   749	
   750	static int keembay_pcie_probe(struct platform_device *pdev)
   751	{
   752		const struct keembay_pcie_of_data *data;
   753		const struct of_device_id *match;
   754		struct device *dev = &pdev->dev;
   755		struct keembay_pcie *pcie;
   756		struct dw_pcie *pci;
   757		struct resource *res;
   758		struct device_node *soc_node, *version_node;
   759		enum dw_pcie_device_mode mode;
   760		const char *prop;
   761		int prop_size;
   762		int ret;
   763	
   764		match = of_match_device(keembay_pcie_of_match, dev);
   765		if (!match)
   766			return -EINVAL;
   767	
   768		data = (struct keembay_pcie_of_data *)match->data;
   769		mode = (enum dw_pcie_device_mode)data->mode;
   770	
   771		pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
   772		if (!pcie)
   773			return -ENOMEM;
   774	
   775		pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
   776		if (!pci)
   777			return -ENOMEM;
   778	
   779		pci->dev = dev;
   780		pci->ops = &keembay_pcie_ops;
   781	
   782		pcie->pci = pci;
   783		pcie->mode = mode;
   784	
   785		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb");
   786		pcie->apb_base = devm_ioremap_resource(dev, res);
   787		if (IS_ERR(pcie->apb_base))
   788			return PTR_ERR(pcie->apb_base);
   789	
   790		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
   791		pci->dbi_base = devm_ioremap_resource(dev, res);
   792		if (IS_ERR(pci->dbi_base))
   793			return PTR_ERR(pci->dbi_base);
   794	
   795		/* DBI2 shadow register */
   796		pci->dbi_base2 = pci->dbi_base + PCIE_DBI2_MASK;
   797	
   798		/* Keem Bay stepping info, based on DT */
 > 799		strncpy(pcie->stepping, "B0", strlen("B0"));
   800		soc_node = of_get_parent(pdev->dev.of_node);
   801		if (soc_node) {
   802			version_node = of_get_child_by_name(soc_node, "version-info");
   803			if (version_node) {
   804				prop = of_get_property(version_node, "stepping",
   805						       &prop_size);
   806				if (prop && prop_size <= KEEMBAY_PCIE_STEPPING_MAXLEN)
   807					strncpy(pcie->stepping, prop, prop_size);
   808				of_node_put(version_node);
   809			}
   810			of_node_put(soc_node);
   811		}
   812	
   813		platform_set_drvdata(pdev, pcie);
   814	
   815		switch (pcie->mode) {
   816		case DW_PCIE_RC_TYPE:
   817			if (!IS_ENABLED(CONFIG_PCIE_KEEMBAY_HOST))
   818				return -ENODEV;
   819	
   820			ret = keembay_pcie_add_pcie_port(pcie, pdev);
   821			if (ret < 0)
   822				return ret;
   823			break;
   824		case DW_PCIE_EP_TYPE:
   825			if (!IS_ENABLED(CONFIG_PCIE_KEEMBAY_EP))
   826				return -ENODEV;
   827	
   828			ret = keembay_pcie_add_pcie_ep(pcie, pdev);
   829			if (ret < 0)
   830				return ret;
   831			break;
   832		default:
   833			dev_err(dev, "INVALID device type %d\n", pcie->mode);
   834		}
   835	
   836		return 0;
   837	}
   838	

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

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