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path: root/drivers/acpi/pci_root.c
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Diffstat (limited to 'drivers/acpi/pci_root.c')
-rw-r--r--drivers/acpi/pci_root.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 4eac59393ed..1f67057af2a 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -33,6 +33,7 @@
#include <linux/pm_runtime.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
+#include <linux/pci-aspm.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <acpi/acpi_bus.h>
@@ -543,6 +544,14 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (flags != base_flags)
acpi_pci_osc_support(root, flags);
+ status = acpi_pci_osc_control_set(root->device->handle,
+ OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
+
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_INFO "Unable to assume PCIe control: Disabling ASPM\n");
+ pcie_no_aspm();
+ }
+
pci_acpi_add_bus_pm_notifier(device, root->bus);
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);