diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index a8c20f2e3a46..138ff0efa6dd 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -1407,8 +1407,12 @@ static int __pci_enable_link_state(struct pci_dev *pdev, int state, bool locked) * the _OSC method), we can't honor that request. */ if (aspm_disabled) { - pci_warn(pdev, "can't override BIOS ASPM; OS doesn't have ASPM control\n"); - return -EPERM; + if (aspm_support_enabled && pdev->aspm_os_control) + pci_info(pdev, "BIOS can't program ASPM, let OS control it\n"); + else { + pci_warn(pdev, "can't override BIOS ASPM; OS doesn't have ASPM control\n"); + return -EPERM; + } } if (!locked) diff --git a/include/linux/pci.h b/include/linux/pci.h index 1f90649a6603..2ac7b3124230 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -465,6 +465,7 @@ struct pci_dev { unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */ unsigned int rom_bar_overlap:1; /* ROM BAR disable broken */ unsigned int rom_attr_enabled:1; /* Display of ROM attribute enabled? */ + unsigned int aspm_os_control:1; /* Display of ROM attribute enabled? */ pci_dev_flags_t dev_flags; atomic_t enable_cnt; /* pci_enable_device has been called */