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Fu Zhonghuirafaeljw
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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: 8ce62f8 (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>
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drivers/acpi/acpi_lpss.c

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