Re: [PATCH v1] PCI: Set no io resource for bridges that behind VMD controller

[kernel test robot]

Hi Xiaochun,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on helgaas-pci/next]
[also build test ERROR on linus/master v6.0-rc6 next-20220923]
[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/Xiaochun-Lee/PCI-Set-no-io-resource-for-bridges-that-behind-VMD-controller/20220913-213745
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20220924/202209240714.ronvmf1X-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/f97a8ba561d7cf5a755c8f42421138e8b1073cf9
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Xiaochun-Lee/PCI-Set-no-io-resource-for-bridges-that-behind-VMD-controller/20220913-213745
        git checkout f97a8ba561d7cf5a755c8f42421138e8b1073cf9
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   drivers/pci/quirks.c: In function 'quirk_vmd_no_iosize':
>> drivers/pci/quirks.c:5985:13: error: implicit declaration of function 'is_vmd' [-Werror=implicit-function-declaration]
    5985 |         if (is_vmd(bridge->bus) && bridge->is_hotplug_bridge) {
         |             ^~~~~~
   cc1: some warnings being treated as errors


vim +/is_vmd +5985 drivers/pci/quirks.c

  5959	
  5960	#if defined(CONFIG_X86_64) || defined(CONFIG_X86)
  5961	/*
  5962	 * VMD-enabled root ports use Enhanced Configuration Access Mechanism (ECAM)
  5963	 * access PCI Express configuration space, and offer VMD_CFGBAR as
  5964	 * base of PCI Express configuration space for the bridges behind it.
  5965	 * The configuration space includes IO resources, but these IO
  5966	 * resources are not actually used on X86, especially the NVMes as
  5967	 * device connnected on this hot plug bridges, and it can result
  5968	 * in BAR#13 assign IO resource failed. So we clear IO resources
  5969	 * by setting an IO base value greater than limit to these bridges.
  5970	 * Hence, append kernel parameter "pci=hpiosize=0KB" can avoid
  5971	 * this BAR#13 failed messages show out.
  5972	 */
  5973	static void quirk_vmd_no_iosize(struct pci_dev *bridge)
  5974	{
  5975		u8 io_base_lo, io_limit_lo;
  5976		u16 io_low;
  5977		u32 io_upper16;
  5978		unsigned long io_mask,  base, limit;
  5979	
  5980		io_mask = PCI_IO_RANGE_MASK;
  5981		if (bridge->io_window_1k)
  5982			io_mask = PCI_IO_1K_RANGE_MASK;
  5983	
  5984		/* VMD Domain */
> 5985		if (is_vmd(bridge->bus) && bridge->is_hotplug_bridge) {

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