Hi Michał,
kernel test robot noticed the following build warnings:
[auto build test WARNING on pci/for-linus]
[also build test WARNING on drm-xe/drm-xe-next drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-misc/drm-misc-next drm-tip/drm-tip linus/master v6.11 next-20240919]
[cannot apply to pci/next]
[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/Micha-Winiarski/PCI-Add-support-for-VF-Resizable-Bar-extended-cap/20240920-064112
base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git for-linus
patch link: https://lore.kernel.org/r/20240919223557.1897608-2-michal.winiarski%40intel.com
patch subject: [PATCH v2 1/3] PCI: Add support for VF Resizable Bar extended cap
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20240920/202409201629.QlC0MRbn-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240920/202409201629.QlC0MRbn-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409201629.QlC0MRbn-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/pci/pci.c:1920:20: warning: variable 'res' set but not used [-Wunused-but-set-variable]
1920 | struct resource *res;
| ^
1 warning generated.
vim +/res +1920 drivers/pci/pci.c
1903
1904 static void pci_restore_vf_rebar_state(struct pci_dev *pdev)
1905 {
1906 unsigned int pos, nbars, i;
1907 u32 ctrl;
1908
1909 if (!pdev->is_physfn)
1910 return;
1911
1912 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_VF_REBAR);
1913 if (!pos)
1914 return;
1915
1916 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
1917 nbars = FIELD_GET(PCI_REBAR_CTRL_NBAR_MASK, ctrl);
1918
1919 for (i = 0; i < nbars; i++, pos += 8) {
> 1920 struct resource *res;
1921 int bar_idx, size;
1922
1923 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
1924 bar_idx = ctrl & PCI_REBAR_CTRL_BAR_IDX;
1925 res = pdev->resource + bar_idx;
1926 size = pci_rebar_bytes_to_size(pdev->sriov->barsz[bar_idx]);
1927 ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE;
1928 ctrl |= FIELD_PREP(PCI_REBAR_CTRL_BAR_SIZE, size);
1929 pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl);
1930 }
1931 }
1932
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