From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:52684 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928AbdKEOoz (ORCPT ); Sun, 5 Nov 2017 09:44:55 -0500 Subject: Patch "PM / QoS: Fix default runtime_pm device resume latency" has been added to the 4.13-stable tree To: t-kristo@ti.com, gregkh@linuxfoundation.org, rafael.j.wysocki@intel.com Cc: , From: Date: Sun, 05 Nov 2017 15:44:38 +0100 Message-ID: <1509893078233166@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled PM / QoS: Fix default runtime_pm device resume latency to the 4.13-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: pm-qos-fix-default-runtime_pm-device-resume-latency.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 2a9a86d5c81389cd9afe6a4fea42c585733cd705 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Mon, 30 Oct 2017 09:10:46 +0200 Subject: PM / QoS: Fix default runtime_pm device resume latency From: Tero Kristo commit 2a9a86d5c81389cd9afe6a4fea42c585733cd705 upstream. The recent change to the PM QoS framework to introduce a proper no constraint value overlooked to handle the devices which don't implement PM QoS OPS. Runtime PM is one of the more severely impacted subsystems, failing every attempt to runtime suspend a device. This leads into some nasty second level issues like probe failures and increased power consumption among other things. Fix this by adding a proper return value for devices that don't implement PM QoS. Fixes: 0cc2b4e5a020 (PM / QoS: Fix device resume latency PM QoS) Signed-off-by: Tero Kristo Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- include/linux/pm_qos.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -175,7 +175,8 @@ static inline s32 dev_pm_qos_requested_f static inline s32 dev_pm_qos_raw_read_value(struct device *dev) { return IS_ERR_OR_NULL(dev->power.qos) ? - 0 : pm_qos_read_value(&dev->power.qos->resume_latency); + PM_QOS_RESUME_LATENCY_NO_CONSTRAINT : + pm_qos_read_value(&dev->power.qos->resume_latency); } #else static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, Patches currently in stable-queue which might be from t-kristo@ti.com are queue-4.13/pm-qos-fix-default-runtime_pm-device-resume-latency.patch