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PCI: disable ASPM per ACPI FADT setting

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The ACPI FADT table includes an ASPM control bit. If the bit is set, do
not enable ASPM since it may indicate that the platform doesn't actually
support the feature.

Tested-by: Jack Howarth <[email protected]>
Signed-off-by: Shaohua Li <[email protected]>
Signed-off-by: Jesse Barnes <[email protected]>
This commit is contained in:
Shaohua Li 2008-07-23 10:32:24 +08:00 • committed by Jesse Barnes
commit 5fde244d39
4 changed files with 18 additions and 0 deletions
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1
include/acpi/actbl.h
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@ -277,6 +277,7 @@ enum acpi_prefered_pm_profiles {
#define BAF_LEGACY_DEVICES 0x0001
#define BAF_8042_KEYBOARD_CONTROLLER 0x0002
#define BAF_MSI_NOT_SUPPORTED 0x0008
#define BAF_PCIE_ASPM_CONTROL 0x0010
#define FADT2_REVISION_ID 3
#define FADT2_MINUS_REVISION_ID 2