diff options
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 4e1af7637501..a84f87247d2f 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -525,7 +525,7 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev) INIT_LIST_HEAD(&link->children); INIT_LIST_HEAD(&link->link); link->pdev = pdev; - if (pci_pcie_type(pdev) == PCI_EXP_TYPE_DOWNSTREAM) { + if (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) { struct pcie_link_state *parent; parent = pdev->bus->parent->self->link_state; if (!parent) { @@ -559,10 +559,15 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) if (!aspm_support_enabled) return; - if (!pci_is_pcie(pdev) || pdev->link_state) + if (pdev->link_state) return; - if (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT && - pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM) + + /* + * We allocate pcie_link_state for the component on the upstream + * end of a Link, so there's nothing to do unless this device has a + * Link on its secondary side. + */ + if (!pdev->has_secondary_link) return; /* VIA has a strange chipset, root port is under a bridge */ @@ -715,8 +720,7 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem) if (!pci_is_pcie(pdev)) return; - if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT || - pci_pcie_type(pdev) == PCI_EXP_TYPE_DOWNSTREAM) + if (pdev->has_secondary_link) parent = pdev; if (!parent || !parent->link_state) return; |