From 575b98e39d817537afdc6c39d35c1de484a64d42 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 10 Nov 2025 16:22:26 -0600 Subject: PCI/ASPM: Add pcie_aspm_remove_cap() to override advertised link states Add pcie_aspm_remove_cap(). A quirk can use this to prevent use of ASPM L0s or L1 link states, even if the device advertised support for them. Signed-off-by: Bjorn Helgaas Tested-by: Shawn Lin Reviewed-by: Lukas Wunner Link: https://patch.msgid.link/20251110222929.2140564-3-helgaas@kernel.org --- drivers/pci/pci.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/pci/pci.h') diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 4492b809094b..36f8c0985430 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -958,6 +958,7 @@ void pci_save_aspm_l1ss_state(struct pci_dev *dev); void pci_restore_aspm_l1ss_state(struct pci_dev *dev); #ifdef CONFIG_PCIEASPM +void pcie_aspm_remove_cap(struct pci_dev *pdev, u32 lnkcap); void pcie_aspm_init_link_state(struct pci_dev *pdev); void pcie_aspm_exit_link_state(struct pci_dev *pdev); void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked); @@ -965,6 +966,7 @@ void pcie_aspm_powersave_config_link(struct pci_dev *pdev); void pci_configure_ltr(struct pci_dev *pdev); void pci_bridge_reconfigure_ltr(struct pci_dev *pdev); #else +static inline void pcie_aspm_remove_cap(struct pci_dev *pdev, u32 lnkcap) { } static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { } static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { } static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked) { } -- cgit v1.2.3