Messages in this thread Patch in this message | | | Date | Tue, 30 Jun 2009 16:59:52 -0700 | From | Greg KH <> | Subject | [patch 08/30] PCI: disable ASPM on VIA root-port-under-bridge configurations |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
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From: Shaohua Li <shaohua.li@intel.com>
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 <wd@denx.de> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/pci/pcie/aspm.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -633,6 +633,10 @@ void pcie_aspm_init_link_state(struct pc 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;
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