4.4-stable review patch. If anyone has any objections, please let me know.
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From: Mika Westerberg mika.westerberg@linux.intel.com
[ Upstream commit 408fec36a1ab3d14273c2116b449ef1e9be3cb8b ]
Currently we request control of native PCIe hotplug unconditionally. Native PCIe hotplug events are handled by the pciehp driver, and if it is not enabled those events will be lost.
Request control of native PCIe hotplug only if the pciehp driver is enabled, so we will actually handle native PCIe hotplug events.
Suggested-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: Mika Westerberg mika.westerberg@linux.intel.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/pci_root.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -472,9 +472,11 @@ static void negotiate_os_control(struct }
control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL - | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | OSC_PCI_EXPRESS_PME_CONTROL;
+ if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE)) + control |= OSC_PCI_EXPRESS_NATIVE_HP_CONTROL; + if (pci_aer_available()) { if (aer_acpi_firmware_first()) dev_info(&device->dev,