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PCI: pciehp: Request control of native hotplug only if supported

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[ Upstream commit 408fec36a1 ]

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>
This commit is contained in:
Mika Westerberg
2018-05-23 17:19:22 -05:00
committed by Chris
parent da84bd26f3
commit 5b49358f87
1 changed files with 3 additions and 1 deletions
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4
drivers/acpi/pci_root.c
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@@ -472,9 +472,11 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)
}
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,