From 376c10a25a8b73b90e67d2fa870bfda288fa067d Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Mon, 8 Jun 2009 09:27:25 +0800 Subject: [PATCH] PCI: disable ASPM on VIA root-port-under-bridge configurations commit 8e822df700694ca6850d1e0c122fd7004b2778d8 upstream. VIA has a strange chipset, it has root port under a bridge. Disable ASPM for such strange chipset. Tested-by: Wolfgang Denk Signed-off-by: Shaohua Li Signed-off-by: Jesse Barnes Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pcie/aspm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index b0367f168af4..777b2c76caf5 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -638,6 +638,10 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) if (pdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT && pdev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM) return; + /* VIA has a strange chipset, root port is under a bridge */ + if (pdev->pcie_type == PCI_EXP_TYPE_ROOT_PORT && + pdev->bus->self) + return; down_read(&pci_bus_sem); if (list_empty(&pdev->subordinate->devices)) goto out; -- 2.39.5