[PATCH] PCI/ASPM: Should not report ASPM support to BIOS if FADT indicates ASPM is unsupported

Manyi Li
2022-07-13T11:26:49Z

Startup log of ASUSTeK X456UJ Notebook show:
[ 0.130563] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
[ 48.092472] pcieport 0000:00:1c.5: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID)
[ 48.092479] pcieport 0000:00:1c.5: device [8086:9d15] error status/mask=00000001/00002000
[ 48.092481] pcieport 0000:00:1c.5: [ 0] RxErr
[ 48.092490] pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
[ 48.092504] pcieport 0000:00:1c.5: AER: can't find device of ID00e5
[ 48.092506] pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5

Signed-off-by: Manyi Li <limanyi@uniontech.com>
---
drivers/pci/pcie/aspm.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index a96b7424c9bc..b173d3c75ae7 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1359,6 +1359,7 @@ void pcie_no_aspm(void)
if (!aspm_force) {
aspm_policy = POLICY_DEFAULT;
aspm_disabled = 1;
+ aspm_support_enabled = false;
}
}

--
2.20.1