tree: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/hotplug head: 9bb3bb1b6688cf16691f98a422aaa47a0f38507f commit: 50b623f07b02fc48e4d7d3e8b5a302abf40b3a7a [34/35] PCI: Whitelist native hotplug ports for runtime D3 config: powerpc-walnut_defconfig (attached as .config) compiler: powerpc-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 50b623f07b02fc48e4d7d3e8b5a302abf40b3a7a # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=powerpc All errors (new ones prefixed by >>): drivers/pci/pci.c: In function 'pci_bridge_d3_possible': >> drivers/pci/pci.c:2311:37: error: implicit declaration of function 'pciehp_is_native'; did you mean 'pcie_ports_native'? [-Werror=implicit-function-declaration] if (bridge->is_hotplug_bridge && !pciehp_is_native(bridge)) ^~~~~~~~~~~~~~~~ pcie_ports_native cc1: some warnings being treated as errors vim +2311 drivers/pci/pci.c 2287 2288 /** 2289 * pci_bridge_d3_possible - Is it possible to put the bridge into D3 2290 * @bridge: Bridge to check 2291 * 2292 * This function checks if it is possible to move the bridge to D3. 2293 * Currently we only allow D3 for recent enough PCIe ports. 2294 */ 2295 bool pci_bridge_d3_possible(struct pci_dev *bridge) 2296 { 2297 if (!pci_is_pcie(bridge)) 2298 return false; 2299 2300 switch (pci_pcie_type(bridge)) { 2301 case PCI_EXP_TYPE_ROOT_PORT: 2302 case PCI_EXP_TYPE_UPSTREAM: 2303 case PCI_EXP_TYPE_DOWNSTREAM: 2304 if (pci_bridge_d3_disable) 2305 return false; 2306 2307 /* 2308 * Hotplug ports handled by firmware in System Management Mode 2309 * may not be put into D3 by the OS (Thunderbolt on non-Macs). 2310 */ > 2311 if (bridge->is_hotplug_bridge && !pciehp_is_native(bridge)) 2312 return false; 2313 2314 if (pci_bridge_d3_force) 2315 return true; 2316 2317 /* 2318 * Hotplug ports handled natively by the OS were not validated 2319 * by vendors for runtime D3 at least until 2018 because there 2320 * was no OS support. 2321 */ 2322 if (bridge->is_hotplug_bridge) 2323 return false; 2324 2325 /* 2326 * It should be safe to put PCIe ports from 2015 or newer 2327 * to D3. 2328 */ 2329 if (dmi_get_bios_year() >= 2015) 2330 return true; 2331 break; 2332 } 2333 2334 return false; 2335 } 2336 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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