This is a note to let you know that I've just added the patch titled
ACPI / PM: Runtime resume devices when waking from hibernate
to the 4.5-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-pm-runtime-resume-devices-when-waking-from-hibernate.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fbda4b38fa3995aa0777fe9cbbdcb223c6292083 Mon Sep 17 00:00:00 2001
From: Lukas Wunner <lukas@xxxxxxxxx>
Date: Wed, 23 Mar 2016 00:11:20 +0100
Subject: ACPI / PM: Runtime resume devices when waking from hibernate
From: Lukas Wunner <lukas@xxxxxxxxx>
commit fbda4b38fa3995aa0777fe9cbbdcb223c6292083 upstream.
Commit 58a1fbbb2ee8 ("PM / PCI / ACPI: Kick devices that might have been
reset by firmware") added a runtime resume for devices that were runtime
suspended when the system entered suspend-to-RAM.
Briefly, the motivation was to ensure that devices did not remain in a
reset-power-on state after resume, potentially preventing deep SoC-wide
low-power states from being entered on idle.
Currently we're not doing the same when leaving suspend-to-disk and this
asymmetry is a problem if drivers rely on the automatic resume triggered
by pm_complete_with_resume_check(). Fix it.
Fixes: 58a1fbbb2ee8 (PM / PCI / ACPI: Kick devices that might have been reset by firmware)
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/sleep.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -714,6 +714,7 @@ static int acpi_hibernation_enter(void)
static void acpi_hibernation_leave(void)
{
+ pm_set_resume_via_firmware();
/*
* If ACPI is not enabled by the BIOS and the boot kernel, we need to
* enable it here.
Patches currently in stable-queue which might be from lukas@xxxxxxxxx are
queue-4.5/acpi-pm-runtime-resume-devices-when-waking-from-hibernate.patch
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