[PATCH v1 2/2] PCI/ACPI: Request LTR control from platform before using it

From: Bjorn Helgaas Per the PCI Firmware spec r3.2, sec 4.5, an ACPI-based OS should use _OSC to request control of Latency Tolerance Reporting (LTR) before using it. Request control of LTR, and if the platform does not grant control, don't use it. N.B. If the hardware

[PATCH v1 2/2] PCI/ACPI: Request LTR control from platform before using it

From: Bjorn Helgaas Per the PCI Firmware spec r3.2, sec 4.5, an ACPI-based OS should use _OSC to request control of Latency Tolerance Reporting (LTR) before using it. Request control of LTR, and if the platform does not grant control, don't use it. N.B. If the hardware supports LTR and the