Re: linux-next: Tree for Jul 30 (pci/controller/cadence/)

[Bjorn Helgaas <helgaas@kernel.org>]

On Thu, Jul 30, 2026 at 07:27:42PM -0500, Bjorn Helgaas wrote:
> [+cc authors of everything on pci/controller/cadence; I haven't
> triaged this at all, sorry, and don't have time right now to drop that
> branch from pci/next]
> 
> On Thu, Jul 30, 2026 at 04:06:44PM -0700, Randy Dunlap wrote:
> > 
> > 
> > On 7/30/26 8:02 AM, Mark Brown wrote:
> > > Hi all,
> > > 
> > > Changes since 20260729:
> > > 
> > 
> > (1) /usr/bin/ld.bfd: drivers/pci/controller/cadence/pcie-cadence-plat.o: in function `cdns_plat_pcie_probe':
> > pcie-cadence-plat.c:(.text+0x2f8): undefined reference to `cdns_pcie_ep_setup'
> > 
> > In this case, a builtin driver attempts to call into a loadable module:
> > 
> > #
> > # Cadence-based PCIe controllers
> > #
> > CONFIG_PCIE_CADENCE=y
> > # CONFIG_PCIE_CADENCE_DEBUGFS is not set
> > CONFIG_PCIE_CADENCE_HOST=y
> > CONFIG_PCIE_CADENCE_EP=m
> > CONFIG_PCIE_CADENCE_PLAT=y
> > CONFIG_PCIE_CADENCE_PLAT_HOST=y
> > CONFIG_PCIE_CADENCE_PLAT_EP=m
> > # end of Cadence-based PCIe controllers

I was unable to reproduce this issue, so I didn't do anything.  I
didn't figure out how to make CONFIG_PCIE_CADENCE_EP=m; the config I
used was:

  CONFIG_PCIE_CADENCE=y
  # CONFIG_PCIE_CADENCE_DEBUGFS is not set
  CONFIG_PCIE_CADENCE_HOST=y
  CONFIG_PCIE_CADENCE_EP=y
  CONFIG_PCIE_CADENCE_PLAT=y
  CONFIG_PCIE_CADENCE_PLAT_HOST=y
  CONFIG_PCIE_CADENCE_PLAT_EP=m

> > (2) /usr/bin/ld.bfd: drivers/pci/controller/cadence/pcie-cadence-plat.o: in function `cdns_plat_pcie_probe':
> > pcie-cadence-plat.c:(.text+0x11f): undefined reference to `cdns_pcie_host_setup'
> > 
> > 
> > This is similar, just a different driver is =m in the failure case.
> > 
> > #
> > # Cadence-based PCIe controllers
> > #
> > CONFIG_PCIE_CADENCE=y
> > CONFIG_PCIE_CADENCE_DEBUGFS=y
> > CONFIG_PCIE_CADENCE_HOST=m
> > CONFIG_PCIE_CADENCE_EP=y
> > CONFIG_PCIE_CADENCE_PLAT=y
> > CONFIG_PCIE_CADENCE_PLAT_HOST=m
> > CONFIG_PCIE_CADENCE_PLAT_EP=y
> > 
> > 
> > -- 
> > ~Randy
> >