Commit 45792081 authored Sep 24, 2014 by Fu Zhonghui Committed by Rafael J. Wysocki Sep 24, 2014

ACPI / platform / LPSS: disable async suspend/resume of LPSS devices

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: 8ce62f85 (ACPI / platform / LPSS: Enable async suspend/resume of LPSS devices)
Signed-off-by: Li Aubrey <aubrey.li@linux.intel.com>
Signed-off-by: Fu Zhonghui <zhonghui.fu@linux.intel.com>
Cc: 3.16+ <stable@vger.kernel.org> # 3.16+
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 0f33be00

drivers/acpi/acpi_lpss.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -419,7 +419,6 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
		adev->driver_data = pdata;
		pdev = acpi_create_platform_device(adev);
		if (!IS_ERR_OR_NULL(pdev)) {
		device_enable_async_suspend(&pdev->dev);
		return 1;
		}

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