[SRU] [F/G/Unstable/OEM-5.6] [PATCH 0/2] Refresh ACPI wakeup power to make Thunderbolt hotplug detection work

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1906229

[Impact]
Dell Precision 5550 cannot detect Thunderbolt device hotplug.

[Fix]
Refresh ACPI wakeup power if it's already enabled to make GPE work.

[Test]
Make sure the root port of TBT hierachy is in D3cold.
Plug a Thunderbolt Dock or Thunderbolt Disk, the system cannot detect
anything.

With the patch applied, OS can always detect hotplugged Thunderbolt
devices.

[Where problems could occur]
Though we refresh the wakeup device power, we didn't disable/enable ACPI
GPEs, so we won't miss any GPE event from this fix.

Rafael J. Wysocki (2):
  PM: ACPI: PCI: Drop acpi_pm_set_bridge_wakeup()
  PM: ACPI: Refresh wakeup device power configuration every time

 drivers/acpi/device_pm.c | 62 +++++++++++++++++++---------------------
 drivers/pci/pci-acpi.c   |  4 +--
 include/acpi/acpi_bus.h  |  5 ----
 3 files changed, 31 insertions(+), 40 deletions(-)

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2.29.2