ACPI / ACPICA: Defer enabling of runtime GPEs (v3)

The current ACPI GPEs initialization code has a problem that it
enables some GPEs pointed to by device _PRW methods, generally
intended for signaling wakeup events (system or device wakeup).
These GPEs are then almost immediately disabled by the ACPI namespace
scanning code with the help of acpi_gpe_can_wake(), but it would be
better not to enable them at all until really necessary.

Modify the initialization of GPEs so that the ones that have
associated _Lxx or _Exx methods and are not pointed to by any _PRW
methods will be enabled after the namespace scan is complete.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 0 insertions, 13 deletions

diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
index 7f8cefc..16cc48c 100644
--- a/drivers/acpi/acpica/utxface.c
+++ b/drivers/acpi/acpica/utxface.c
@@ -290,19 +290,6 @@ acpi_status acpi_initialize_objects(u32 flags)
 	}
 
 	/*
-	 * Complete the GPE initialization for the GPE blocks defined in the FADT
-	 * (GPE block 0 and 1).
-	 *
-	 * NOTE: Currently, there seems to be no need to run the _REG methods
-	 * before enabling the GPEs.
-	 */
-	if (!(flags & ACPI_NO_EVENT_INIT)) {
-		status = acpi_ev_install_fadt_gpes();
-		if (ACPI_FAILURE(status))
-			return (status);
-	}
-
-	/*
 	 * Empty the caches (delete the cached objects) on the assumption that
 	 * the table load filled them up more than they will be at runtime --
 	 * thus wasting non-paged memory.