Re: [PATCH] PCI: rzg3s-host: Add Renesas RZ/G3S SoC host driver

[kernel test robot <lkp@intel.com>]

Hi Claudiu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on pci/next]
[also build test WARNING on pci/for-linus linus/master v6.17-rc6 next-20250919]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Claudiu/PCI-rzg3s-host-Add-Renesas-RZ-G3S-SoC-host-driver/20250919-174238
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next
patch link:    https://lore.kernel.org/r/20250919093741.1695015-1-claudiu.beznea.uj%40bp.renesas.com
patch subject: [PATCH] PCI: rzg3s-host: Add Renesas RZ/G3S SoC host driver
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20250920/202509201730.nTm6qpou-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 7c861bcedf61607b6c087380ac711eb7ff918ca6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250920/202509201730.nTm6qpou-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509201730.nTm6qpou-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from <built-in>:3:
   In file included from include/linux/compiler_types.h:171:
   include/linux/compiler-clang.h:28:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined]
      28 | #define __SANITIZE_ADDRESS__
         |         ^
   <built-in>:371:9: note: previous definition is here
     371 | #define __SANITIZE_ADDRESS__ 1
         |         ^
>> drivers/pci/controller/pcie-rzg3s-host.c:834:29: warning: variable 'irq' is uninitialized when used here [-Wuninitialized]
     834 |                 return dev_err_probe(dev, irq ? irq : -EINVAL,
         |                                           ^~~
   drivers/pci/controller/pcie-rzg3s-host.c:826:9: note: initialize the variable 'irq' to silence this warning
     826 |         int irq, ret;
         |                ^
         |                 = 0
   2 warnings generated.


vim +/irq +834 drivers/pci/controller/pcie-rzg3s-host.c

   819	
   820	static int rzg3s_pcie_msi_enable(struct rzg3s_pcie_host *host)
   821	{
   822		struct platform_device *pdev = to_platform_device(host->dev);
   823		struct rzg3s_pcie_msi *msi = &host->msi;
   824		struct device *dev = host->dev;
   825		const char *devname;
   826		int irq, ret;
   827	
   828		ret = devm_mutex_init(dev, &msi->map_lock);
   829		if (ret)
   830			return ret;
   831	
   832		msi->irq = platform_get_irq_byname(pdev, "msi");
   833		if (msi->irq < 0)
 > 834			return dev_err_probe(dev, irq ? irq : -EINVAL,
   835					     "Failed to get MSI IRQ!\n");
   836	
   837		devname = devm_kasprintf(dev, GFP_KERNEL, "%s-msi", dev_name(dev));
   838		if (!devname)
   839			return -ENOMEM;
   840	
   841		ret = rzg3s_pcie_msi_allocate_domains(msi);
   842		if (ret)
   843			return ret;
   844	
   845		ret = request_irq(msi->irq, rzg3s_pcie_msi_irq, 0, devname, host);
   846		if (ret) {
   847			dev_err_probe(dev, ret, "Failed to request IRQ: %d\n", ret);
   848			goto free_domains;
   849		}
   850	
   851		ret = rzg3s_pcie_msi_setup(host);
   852		if (ret) {
   853			dev_err_probe(dev, ret, "Failed to setup MSI!\n");
   854			goto free_irq;
   855		}
   856	
   857		return 0;
   858	
   859	free_irq:
   860		free_irq(msi->irq, host);
   861	free_domains:
   862		irq_domain_remove(msi->domain);
   863		return ret;
   864	}
   865	

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