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

[Christian Zigotzky]

> On 11 October 2025 at 07:36 pm, Manivannan Sadhasivam <mani at kernel.org> wrote:
> 
> Hi Lukas,
> 
> Thanks for looping me in. The referenced commit forcefully enables ASPM on all
> DT platforms as we decided to bite the bullet finally.
> 
> Looks like the device (0000:01:00.0) doesn't play nice with ASPM even though it
> advertises ASPM capability.
> 
> Christian, could you please test the below change and see if it fixes the issue?
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 214ed060ca1b..e006b0560b39 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -2525,6 +2525,15 @@ static void quirk_disable_aspm_l0s_l1(struct pci_dev *dev)
>  */
> 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, 0x6738, 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
> 
> 
> Going forward, we should be quirking the devices if they behave erratically.
> 
> - Mani
> 
> --
> மணிவண்ணன் சதாசிவம்

Hello Mani,

> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6738, quirk_disable_aspm_all);

Is this only for my AMD Radeon HD6870?

My AMD Radeon HD5870 is also affected.

And I tested it with my AMD Radeon HD5870.

What would the line be for all AMD graphics cards?

Thanks,
Christian