If _OSC execution fails today for platforms without an _OSC
entry, code is printing a misleading message saying disabling
ASPM as follows:
acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
We need to ensure that platform supports ASPM to begin with.
Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxx>
Reported-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
---
drivers/acpi/pci_root.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 7433035..9d738e2 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -455,8 +455,13 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)
decode_osc_support(root, "OS supports", support);
status = acpi_pci_osc_support(root, support);
if (ACPI_FAILURE(status)) {
- dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
- acpi_format_exception(status));
+ char *aspm_msg = "";
+
+ if (pcie_aspm_support_enabled())
+ aspm_msg = "; disabling ASPM";
+
+ dev_info(&device->dev, "_OSC failed (%s) %s\n",
+ acpi_format_exception(status), aspm_msg);
*no_aspm = 1;
return;
}
--
2.7.4
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