Hi Thomas, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on drm-tip/drm-tip linus/master v6.8-rc2 next-20240202] [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/Thomas-Zimmermann/video-Add-helpers-for-decoding-screen_info/20240202-200314 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20240202120140.3517-3-tzimmermann%40suse.de patch subject: [PATCH v2 2/8] video: Provide screen_info_get_pci_dev() to find screen_info's PCI device config: i386-buildonly-randconfig-004-20240203 (https://download.01.org/0day-ci/archive/20240204/202402040957.xNqUV75N-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240204/202402040957.xNqUV75N-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202402040957.xNqUV75N-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/video/screen_info_pci.c:10:6: warning: variable 'pdev' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 10 | if (!(res->flags & IORESOURCE_MEM)) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/video/screen_info_pci.c:13:19: note: uninitialized use occurs here 13 | for_each_pci_dev(pdev) { | ^~~~ include/linux/pci.h:546:80: note: expanded from macro 'for_each_pci_dev' 546 | #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) | ^ drivers/video/screen_info_pci.c:10:2: note: remove the 'if' if its condition is always true 10 | if (!(res->flags & IORESOURCE_MEM)) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 11 | return NULL; drivers/video/screen_info_pci.c:8:22: note: initialize the variable 'pdev' to silence this warning 8 | struct pci_dev *pdev; | ^ | = NULL 1 warning generated. vim +10 drivers/video/screen_info_pci.c 5 6 static struct pci_dev *__screen_info_pci_dev(struct resource *res) 7 { 8 struct pci_dev *pdev; 9 > 10 if (!(res->flags & IORESOURCE_MEM)) 11 return NULL; 12 13 for_each_pci_dev(pdev) { 14 const struct resource *r; 15 16 if ((pdev->class >> 16) != PCI_BASE_CLASS_DISPLAY) 17 continue; 18 19 r = pci_find_resource(pdev, res); 20 if (r) 21 return pdev; 22 } 23 24 return NULL; 25 } 26 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
