From eb7f43c4adb4a789f99f53916182c3401b4e33c7 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 10 Aug 2017 00:34:23 +0200
Subject: [PATCH] ACPI / scan: Enable GPEs before scanning the namespace
Git-commit: eb7f43c4adb4a789f99f53916182c3401b4e33c7
Patch-mainline: v4.14-rc1
References: FATE#323948

On some systems the platform firmware expects GPEs to be enabled
before the enumeration of devices and if that expectation is not
met, the systems in question may not boot in some situations.

For this reason, change the initialization ordering of the ACPI
subsystem to make it enable GPEs before scanning the namespace
for the first time in order to enumerate devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Lv Zheng <lv.zheng@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/acpi/scan.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2059,6 +2059,9 @@ int __init acpi_scan_init(void)
 			acpi_get_spcr_uart_addr();
 	}
 
+	acpi_gpe_apply_masked_gpes();
+	acpi_update_all_gpes();
+
 	mutex_lock(&acpi_scan_lock);
 	/*
 	 * Enumerate devices in the ACPI namespace.
@@ -2083,9 +2086,6 @@ int __init acpi_scan_init(void)
 		}
 	}
 
-	acpi_gpe_apply_masked_gpes();
-	acpi_update_all_gpes();
-
 	acpi_scan_initialized = true;
 
  out: