This is a note to let you know that I've just added the patch titled
ACPI / scan: Enable GPEs before scanning the namespace
to the 4.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-scan-enable-gpes-before-scanning-the-namespace.patch
and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From eb7f43c4adb4a789f99f53916182c3401b4e33c7 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>
Date: Thu, 10 Aug 2017 00:34:23 +0200
Subject: ACPI / scan: Enable GPEs before scanning the namespace
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
commit eb7f43c4adb4a789f99f53916182c3401b4e33c7 upstream.
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@xxxxxxxxxxxxxxx>
Suggested-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Acked-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Tested-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/scan.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2058,6 +2058,9 @@ 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.
@@ -2082,9 +2085,6 @@ int __init acpi_scan_init(void)
}
}
- acpi_gpe_apply_masked_gpes();
- acpi_update_all_gpes();
-
acpi_scan_initialized = true;
out:
Patches currently in stable-queue which might be from rafael.j.wysocki@xxxxxxxxx are
queue-4.13/acpi-pm-blacklist-low-power-s0-idle-_dsm-for-dell-xps13-9360.patch
queue-4.13/acpica-make-it-possible-to-enable-runtime-gpes-earlier.patch
queue-4.13/acpica-dispatch-active-gpes-at-init-time.patch
queue-4.13/acpi-scan-enable-gpes-before-scanning-the-namespace.patch