Re: [PATCH v11 4/6] PCI: dwc: Use common PCI host bridge APIs for finding the capabilities

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

Hi Hans,

kernel test robot noticed the following build warnings:

[auto build test WARNING on ca91b9500108d4cf083a635c2e11c884d5dd20ea]

url:    https://github.com/intel-lab-lkp/linux/commits/Hans-Zhang/PCI-Introduce-generic-bus-config-read-helper-function/20250506-004221
base:   ca91b9500108d4cf083a635c2e11c884d5dd20ea
patch link:    https://lore.kernel.org/r/20250505163420.198012-5-18255117159%40163.com
patch subject: [PATCH v11 4/6] PCI: dwc: Use common PCI host bridge APIs for finding the capabilities
config: parisc-randconfig-r063-20250509 (https://download.01.org/0day-ci/archive/20250509/202505092036.Sw8SstSY-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250509/202505092036.Sw8SstSY-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/202505092036.Sw8SstSY-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In function 'dw_pcie_read_cfg',
       inlined from 'dw_pcie_find_capability' at drivers/pci/controller/dwc/pcie-designware.c:219:9:
>> drivers/pci/controller/dwc/pcie-designware.c:212:14: warning: write of 32-bit data outside the bound of destination object, data truncated into 8-bit [-Wextra]
     212 |         *val = dw_pcie_read_dbi(pci, where, size);
         |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +212 drivers/pci/controller/dwc/pcie-designware.c

   207	
   208	static int dw_pcie_read_cfg(void *priv, int where, int size, u32 *val)
   209	{
   210		struct dw_pcie *pci = priv;
   211	
 > 212		*val = dw_pcie_read_dbi(pci, where, size);
   213	
   214		return PCIBIOS_SUCCESSFUL;
   215	}
   216	

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