[cc += Ilpo, Maciej; start of thread: https://lore.kernel.org/r/7iNzXbCGpf8yUMJZBQjLdbjPcXrEJqBxy5-bHfppz0ek-h4_-G93b1KUrm106r2VNF2FV_sSq0nENv4RsRIUGnlYZMlQr2ZD2NyB5sdj5aU=@protonmail.com/ ] On Mon, Jun 23, 2025 at 11:54:02AM +0000, andreasx0 wrote: > I am encountering a PCIe bandwidth control warning on my Lenovo 82XT > laptop during boot with kernel version 6.15.3. The warning occurs > inside the `pcie_set_target_speed()` function in the PCIe bwctrl > driver and appears related to setting link speeds on AMD Phoenix > GPP Bridge devices. Thanks for the report. If you apply the patch below, does the issue go away? -- >8 -- diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index d7f4ee6..deaaf4f 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -108,7 +108,7 @@ int pcie_failed_link_retrain(struct pci_dev *dev) pcie_capability_read_word(dev, PCI_EXP_LNKCTL2, &lnkctl2); pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnksta); if (!(lnksta & PCI_EXP_LNKSTA_DLLLA) && pcie_lbms_seen(dev, lnksta)) { - u16 oldlnkctl2 = lnkctl2; + u16 oldlnkctl2 = lnkctl2 & PCI_EXP_LNKCTL2_TLS; pci_info(dev, "broken device, retraining non-functional downstream link at 2.5GT/s\n");
