Re: [PATCH v3 2/5] PCI: Put PCIe ports with downstream devices into D3 at hibernate

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

Hi Mario,

kernel test robot noticed the following build errors:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on rafael-pm/bleeding-edge mkp-scsi/for-next jejb-scsi/for-next linus/master v6.16-rc1 next-20250606]
[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/Mario-Limonciello/PM-Use-hibernate-flows-for-system-power-off/20250609-105658
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20250609024619.407257-3-superm1%40kernel.org
patch subject: [PATCH v3 2/5] PCI: Put PCIe ports with downstream devices into D3 at hibernate
config: i386-buildonly-randconfig-003-20250609 (https://download.01.org/0day-ci/archive/20250609/202506091639.HaxwbWtd-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250609/202506091639.HaxwbWtd-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/202506091639.HaxwbWtd-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/pci/pci-driver.c:1221:7: error: call to undeclared function 'pci_pm_set_prepare_bus_pm'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1221 |         if (!pci_pm_set_prepare_bus_pm(pci_dev))
         |              ^
   1 error generated.


vim +/pci_pm_set_prepare_bus_pm +1221 drivers/pci/pci-driver.c

  1195	
  1196	static int pci_pm_poweroff_noirq(struct device *dev)
  1197	{
  1198		struct pci_dev *pci_dev = to_pci_dev(dev);
  1199		const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
  1200	
  1201		if (dev_pm_skip_suspend(dev))
  1202			return 0;
  1203	
  1204		if (pci_has_legacy_pm_support(pci_dev))
  1205			return pci_legacy_suspend_late(dev);
  1206	
  1207		if (!pm) {
  1208			pci_fixup_device(pci_fixup_suspend_late, pci_dev);
  1209			return 0;
  1210		}
  1211	
  1212		if (pm->poweroff_noirq) {
  1213			int error;
  1214	
  1215			error = pm->poweroff_noirq(dev);
  1216			suspend_report_result(dev, pm->poweroff_noirq, error);
  1217			if (error)
  1218				return error;
  1219		}
  1220	
> 1221		if (!pci_pm_set_prepare_bus_pm(pci_dev))
  1222			goto Fixup;
  1223	
  1224		/*
  1225		 * The reason for doing this here is the same as for the analogous code
  1226		 * in pci_pm_suspend_noirq().
  1227		 */
  1228		if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
  1229			pci_write_config_word(pci_dev, PCI_COMMAND, 0);
  1230	
  1231	Fixup:
  1232		pci_fixup_device(pci_fixup_suspend_late, pci_dev);
  1233	
  1234		return 0;
  1235	}
  1236	

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