Re: arc-linux-ld: drivers/pci/controller/cadence/pci-j721e.c:648: undefined reference to `cdns_pcie_host_disable'

[Chen Wang]

On 1/19/2026 10:00 PM, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7
> commit: 1c72774df028429836eec3394212f2921bb830fc PCI: sg2042: Add Sophgo SG2042 PCIe driver
> date:   4 months ago
> config: arc-randconfig-002-20260119 (https://download.01.org/0day-ci/archive/20260119/202601192149.m9qDmfLW-lkp@xxxxxxxxx/config)
> compiler: arc-linux-gcc (GCC) 8.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260119/202601192149.m9qDmfLW-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/202601192149.m9qDmfLW-lkp@xxxxxxxxx/
>
> All errors (new ones prefixed by >>):
>
>     arc-linux-ld: drivers/pci/controller/cadence/pci-j721e.o: in function `j721e_pcie_remove':
>     drivers/pci/controller/cadence/pci-j721e.c:648: undefined reference to `cdns_pcie_host_disable'
> > > arc-linux-ld: drivers/pci/controller/cadence/pci-j721e.c:648: undefined reference to `cdns_pcie_host_disable'

This appears to be a configuration-related issue. 
"CONFIG_PCIE_CADENCE_HOST=m" but "CONFIG_PCI_J721E=y".

I don't think this issue is related to sophgo drivers.

Adding Vignesh and Siddharth who might be interested in this.

Thanks,

Chen