Revert "ACPICA: Clear status of GPEs before enabling them"

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@suse.de/T/#u
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1132943
Reported-by: Michael Hirmke <opensuse@mike.franken.de>
Reported-by: Takashi Iwai <tiwai@suse.de>
Cc: 4.17+ <stable@vger.kernel.org> # 4.17+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 5e9d7348c16f784f93ea117d537dbfbfe454a783..62d3aa74277b4d03cb4bd1e7d5cee705864bd41b 100644 (file)
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -81,12 +81,8 @@ acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
 
        ACPI_FUNCTION_TRACE(ev_enable_gpe);
 
-       /* 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);
        return_ACPI_STATUS(status);
 }