Prevent the kernel from disabling ASPM

gistfile1.txt

diff -rupN linux-4.10-orig/drivers/acpi/pci_root.c linux-4.10/drivers/acpi/pci_root.c
--- linux-4.10-orig/drivers/acpi/pci_root.c	2017-04-03 11:16:04.296665638 +0200
+++ linux-4.10/drivers/acpi/pci_root.c	2017-04-03 11:17:21.696665034 +0200
@@ -494,13 +494,13 @@ static void negotiate_os_control(struct
 			 * it's unsupported. Leave existing configuration
 			 * intact and prevent the OS from touching it.
 			 */
-			dev_info(&device->dev, "FADT indicates ASPM is unsupported, using BIOS configuration\n");
-			*no_aspm = 1;
+			dev_info(&device->dev, "FADT indicates ASPM is unsupported, not caring and keeping ASPM\n");
+			*no_aspm = 0;
 		}
 	} else {
 		decode_osc_control(root, "OS requested", requested);
 		decode_osc_control(root, "platform willing to grant", control);
-		dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
+		dev_info(&device->dev, "_OSC failed (%s); keeping ASPM on anyway\n",
 			acpi_format_exception(status));
 
 		/*
@@ -510,7 +510,7 @@ static void negotiate_os_control(struct
 		 * flag here, to defer the action until after the ACPI
 		 * root scan.
 		 */
-		*no_aspm = 1;
+		*no_aspm = 0;
 	}
 }
 
diff -rupN linux-4.10-orig/drivers/pci/pci-acpi.c linux-4.10/drivers/pci/pci-acpi.c
--- linux-4.10-orig/drivers/pci/pci-acpi.c	2017-04-03 11:16:04.696665635 +0200
+++ linux-4.10/drivers/pci/pci-acpi.c	2017-04-03 11:17:47.266664834 +0200
@@ -863,8 +863,7 @@ static int __init acpi_pci_init(void)
 	}
 
 	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
-		pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
-		pcie_no_aspm();
+		pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, we keep it anyway\n");
 	}
 
 	ret = register_acpi_bus_type(&acpi_pci_bus);