tree: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git pci-dw-cleanups head: 62645842bd85958552314ba85bd14565c16bb392 commit: 9d1e1e624ea779b4abd5f346effd9a46c3caa49d [23/40] PCI: dwc: Add a 'num_lanes' field to struct dw_pcie config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): git checkout 9d1e1e624ea779b4abd5f346effd9a46c3caa49d # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/pci/controller/dwc/pcie-designware.c: In function 'dw_pcie_setup': 549 | int ret; | ^~~ # https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git/commit/?id... git remote add robh https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git git fetch --no-tags robh pci-dw-cleanups git checkout 9d1e1e624ea779b4abd5f346effd9a46c3caa49d vim +/ret +549 drivers/pci/controller/dwc/pcie-designware.c a9f4c2d2f99ec85 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 546 feb85d9b1c47ea8 drivers/pci/dwc/pcie-designware.c Kishon Vijay Abraham I 2017-02-15 547 void dw_pcie_setup(struct dw_pcie *pci) 340cba6092c2c16 drivers/pci/host/pcie-designware.c Jingoo Han 2013-06-21 548 { 5f334db665173fa drivers/pci/dwc/pcie-designware.c Kishon Vijay Abraham I 2017-02-15 @549 int ret; :::::: The code at line 549 was first introduced by commit :::::: 5f334db665173facf2213854408bb5fa2445d0b3 PCI: dwc: designware: Parse "num-lanes" property in dw_pcie_setup_rc() :::::: TO: Kishon Vijay Abraham I <kishon(a)ti.com&gt; :::::: CC: Bjorn Helgaas <bhelgaas(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org