Re: [PATCH] platform/x86/intel/pmc/mtl: Put GNA/IPU/VPU devices in D3

[kernel test robot <lkp@xxxxxxxxx>]

Hi David,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 4f59630a5ed0a4e7d275bd7e5d253a8f5a425c5a]

url:    https://github.com/intel-lab-lkp/linux/commits/David-E-Box/platform-x86-intel-pmc-mtl-Put-GNA-IPU-VPU-devices-in-D3/20230408-102651
base:   4f59630a5ed0a4e7d275bd7e5d253a8f5a425c5a
patch link:    https://lore.kernel.org/r/20230408022629.727721-1-david.e.box%40linux.intel.com
patch subject: [PATCH] platform/x86/intel/pmc/mtl: Put GNA/IPU/VPU devices in D3
config: i386-randconfig-a003-20230403 (https://download.01.org/0day-ci/archive/20230408/202304081356.jXr7C3fH-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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-lab-lkp/linux/commit/04453d42ee1b0c97f9fa68644c6234f7b9e2d14a
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review David-E-Box/platform-x86-intel-pmc-mtl-Put-GNA-IPU-VPU-devices-in-D3/20230408-102651
        git checkout 04453d42ee1b0c97f9fa68644c6234f7b9e2d14a
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/platform/x86/intel/pmc/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304081356.jXr7C3fH-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/intel/pmc/mtl.c:52:6: warning: no previous prototype for function 'mtl_set_device_d3' [-Wmissing-prototypes]
   void mtl_set_device_d3(unsigned int device)
        ^
   drivers/platform/x86/intel/pmc/mtl.c:52:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void mtl_set_device_d3(unsigned int device)
   ^
   static 
   1 warning generated.


vim +/mtl_set_device_d3 +52 drivers/platform/x86/intel/pmc/mtl.c

    48	
    49	#define MTL_GNA_PCI_DEV	0x7e4c
    50	#define MTL_IPU_PCI_DEV	0x7d19
    51	#define MTL_VPU_PCI_DEV	0x7d1d
  > 52	void mtl_set_device_d3(unsigned int device)
    53	{
    54		struct pci_dev *pcidev;
    55	
    56		pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
    57		if (pcidev) {
    58			if (!device_trylock(&pcidev->dev)) {
    59				pci_dev_put(pcidev);
    60				return;
    61			}
    62			if (!pcidev->dev.driver) {
    63				dev_info(&pcidev->dev, "Setting to D3hot\n");
    64				pci_set_power_state(pcidev, PCI_D3hot);
    65			}
    66			device_unlock(&pcidev->dev);
    67			pci_dev_put(pcidev);
    68		}
    69	}
    70	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests