From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Li Aubrey , Fu Zhonghui , "Rafael J. Wysocki" Subject: [PATCH 3.16 197/357] ACPI / platform / LPSS: disable async suspend/resume of LPSS devices Date: Fri, 3 Oct 2014 14:29:43 -0700 Message-Id: <20141003212939.394437302@linuxfoundation.org> In-Reply-To: <20141003212933.458851516@linuxfoundation.org> References: <20141003212933.458851516@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fu Zhonghui 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 Signed-off-by: Fu Zhonghui [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- 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; }