[PATCH 5.0 002/101] Revert "ACPICA: Clear status of GPEs before enabling them"

From: Greg Kroah-Hartman
Date: Thu May 02 2019 - 11:40:37 EST

From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

commit 2c2a2fb1e2a9256714338875bede6b7cbd4b9542 upstream.

Revert commit c8b1917c8987 ("ACPICA: Clear status of GPEs before
enabling them") that causes problems with Thunderbolt controllers
to occur if a dock device is connected at init time (the xhci_hcd
and thunderbolt modules crash which prevents peripherals connected
through them from working).

Commit c8b1917c8987 effectively causes commit ecc1165b8b74 ("ACPICA:
Dispatch active GPEs at init time") to get undone, so the problem
addressed by commit ecc1165b8b74 appears again as a result of it.

Fixes: c8b1917c8987 ("ACPICA: Clear status of GPEs before enabling them")
Link: https://lore.kernel.org/lkml/s5hy33siofw.wl-tiwai@xxxxxxx/T/#u
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1132943
Reported-by: Michael Hirmke <opensuse@xxxxxxxxxxxxxxx>
Reported-by: Takashi Iwai <tiwai@xxxxxxx>
Cc: 4.17+ <stable@xxxxxxxxxxxxxxx> # 4.17+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/acpi/acpica/evgpe.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -81,12 +81,8 @@ acpi_status acpi_ev_enable_gpe(struct ac


- /* Clear the GPE status */
- status = acpi_hw_clear_gpe(gpe_event_info);
- if (ACPI_FAILURE(status))
- return_ACPI_STATUS(status);
/* Enable the requested GPE */
status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);