[PPC] Boot problems after the pci-v6.18-changes

[Manivannan Sadhasivam]

On Tue, Oct 14, 2025 at 06:55:07AM +0200, Christian Zigotzky wrote:
> On 13 October 2025 at 05:58 pm, Manivannan Sadhasivam wrote:
> > Either the Root Port could be triggering these AER messages due to ASPM
> issue or
> > due to the endpoint connected downstream.
> >
> > If possible, please share the whole dmesg log instead of the snippet so
> that we
> > can be sure from where the AER messages are coming from.
> >
> > You can also add the below quirk and check:
> >
> > DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FSL, 0x0451,
> quirk_disable_aspm_all);
> >
> > But it would be better to get the whole dmesg.
> >
> > - Mani
> 
> Hello Mani,
> 
> Thanks for your help.
> 
> The kernel doesn't compile with PCI_VENDOR_ID_FSL but it compiles with
> PCI_VENDOR_ID_FREESCALE.
> 
> I tried it with the following patch:
> 
> diff -rupN a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> --- a/drivers/pci/quirks.c    2025-10-12 22:42:36.000000000 +0200
> +++ b/drivers/pci/quirks.c    2025-10-13 17:59:51.473097708 +0200
> @@ -2525,6 +2525,16 @@ static void quirk_disable_aspm_l0s_l1(st
>   */
>  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x1080,
> quirk_disable_aspm_l0s_l1);
> 
> +
> +static void quirk_disable_aspm_all(struct pci_dev *dev)
> +{
> +       pci_info(dev, "Disabling ASPM\n");
> +       pci_disable_link_state(dev, PCIE_LINK_STATE_ALL);
> +}
> +
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
> quirk_disable_aspm_all);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
> quirk_disable_aspm_all);
> +
>  /*
>   * Some Pericom PCIe-to-PCI bridges in reverse mode need the PCIe Retrain
>   * Link bit cleared after starting the link retrain process to allow this
> 
> ---
> 
> Unfortunately it doesn't solve the issue with pcieport 0001:00:00.0.
> 

That's unfortunate indeed. Could you please share the 'sudo lspci -vv' output?

That will allow us to see the topology and AER status.

- Mani

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