This is a note to let you know that I've just added the patch titled
ACPI / platform / LPSS: disable async suspend/resume of LPSS devices
to the 3.16-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-platform-lpss-disable-async-suspend-resume-of-lpss-devices.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 457920817e645a7dee42c2a75c81c5ed8e12ee1c Mon Sep 17 00:00:00 2001
From: Fu Zhonghui <zhonghui.fu@xxxxxxxxxxxxxxx>
Date: Wed, 24 Sep 2014 22:42:26 +0200
Subject: ACPI / platform / LPSS: disable async suspend/resume of LPSS devices
From: Fu Zhonghui <zhonghui.fu@xxxxxxxxxxxxxxx>
commit 457920817e645a7dee42c2a75c81c5ed8e12ee1c upstream.
On some systems (Asus T100 in particular) there are strict ordering
dependencies between LPSS devices with respect to power management
that break if they suspend/resume asynchronously.
In theory it should be possible to follow those dependencies in the
async suspend/resume case too (the ACPI tables tell as that the
dependencies are there), but since we're missing infrastructure
for that at the moment, disable async suspend/resume for all of
the LPSS devices for the time being.
Link: http://marc.info/?l=linux-acpi&m=141158962321905&w=2
Fixes: 8ce62f85a81f (ACPI / platform / LPSS: Enable async suspend/resume of LPSS devices)
Signed-off-by: Li Aubrey <aubrey.li@xxxxxxxxxxxxxxx>
Signed-off-by: Fu Zhonghui <zhonghui.fu@xxxxxxxxxxxxxxx>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/acpi_lpss.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -392,7 +392,6 @@ static int acpi_lpss_create_device(struc
adev->driver_data = pdata;
pdev = acpi_create_platform_device(adev);
if (!IS_ERR_OR_NULL(pdev)) {
- device_enable_async_suspend(&pdev->dev);
return 1;
}
Patches currently in stable-queue which might be from zhonghui.fu@xxxxxxxxxxxxxxx are
queue-3.16/acpi-lpss-complete-pm-entries-for-lpss-power-domain.patch
queue-3.16/acpi-platform-lpss-disable-async-suspend-resume-of-lpss-devices.patch
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