Commit 2650ef42 authored Apr 28, 2014 by Aaron Lu Committed by Rafael J. Wysocki Apr 28, 2014

ACPI / scan: do not scan fixed hardware on HW-reduced platform



Fixed hardware does not exist on HW-reduced ACPI platforms since the
programming interface for them is not implemented on them, so no need
to scan that hardware on them.

This patch avoids creating the fixed power button ACPI device and
eliminates a probe error message from ACPI button driver on ASUS T100.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent d1db0eea

drivers/acpi/scan.c

+10 −6

Original line number	Diff line number	Diff line
		@@ -2259,13 +2259,17 @@ int __init acpi_scan_init(void)
		if (result)
		goto out;

		/* Fixed feature devices do not exist on HW-reduced platform */
		if (!acpi_gbl_reduced_hardware) {
		result = acpi_bus_scan_fixed();
		if (result) {
		acpi_detach_data(acpi_root->handle, acpi_scan_drop_device);
		acpi_detach_data(acpi_root->handle,
		acpi_scan_drop_device);
		acpi_device_del(acpi_root);
		put_device(&acpi_root->dev);
		goto out;
		}
		}

		acpi_update_all_gpes();