From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966241AbdGUAVE (ORCPT ); Thu, 20 Jul 2017 20:21:04 -0400 Received: from cloudserver094114.home.net.pl ([79.96.170.134]:45883 "EHLO cloudserver094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965855AbdGUAU0 (ORCPT ); Thu, 20 Jul 2017 20:20:26 -0400 From: "Rafael J. Wysocki" To: Linux PM Cc: LKML Subject: [PATCH 1/4] PM / s2idle: Rearrange the main suspend-to-idle loop Date: Fri, 21 Jul 2017 02:07:54 +0200 Message-ID: <4195890.oK06yMODBD@aspire.rjw.lan> User-Agent: KMail/4.14.10 (Linux/4.12.0-rc1+; KDE/4.14.9; x86_64; ; ) In-Reply-To: <1846472.PIoZyNk2cf@aspire.rjw.lan> References: <1846472.PIoZyNk2cf@aspire.rjw.lan> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rafael J. Wysocki As a preparation for subsequent changes, rearrange the core suspend-to-idle code by moving the initial invocation of dpm_suspend_noirq() into s2idle_loop(). This also causes debug messages from that code to appear in a less confusing order. Signed-off-by: Rafael J. Wysocki --- kernel/power/power.h | 4 ++++ kernel/power/suspend.c | 26 +++++++++++++------------- 2 files changed, 17 insertions(+), 13 deletions(-) Index: linux-pm/kernel/power/suspend.c =================================================================== --- linux-pm.orig/kernel/power/suspend.c +++ linux-pm/kernel/power/suspend.c @@ -106,7 +106,13 @@ static void s2idle_loop(void) { pm_pr_dbg("suspend-to-idle\n"); - do { + while (!dpm_suspend_noirq(PMSG_SUSPEND)) { + /* + * Suspend-to-idle equals + * frozen processes + suspended devices + idle processors. + * Thus freeze_enter() should be called right after + * all devices have been suspended. + */ freeze_enter(); if (freeze_ops && freeze_ops->wake) @@ -120,7 +126,7 @@ static void s2idle_loop(void) break; pm_wakeup_clear(false); - } while (!dpm_suspend_noirq(PMSG_SUSPEND)); + } pm_pr_dbg("resume from suspend-to-idle\n"); } @@ -377,6 +383,11 @@ static int suspend_enter(suspend_state_t if (error) goto Devices_early_resume; + if (state == PM_SUSPEND_FREEZE && pm_test_level != TEST_PLATFORM) { + s2idle_loop(); + goto Platform_early_resume; + } + error = dpm_suspend_noirq(PMSG_SUSPEND); if (error) { pr_err("PM: noirq suspend of devices failed\n"); @@ -389,17 +400,6 @@ static int suspend_enter(suspend_state_t if (suspend_test(TEST_PLATFORM)) goto Platform_wake; - /* - * PM_SUSPEND_FREEZE equals - * frozen processes + suspended devices + idle processors. - * Thus we should invoke freeze_enter() soon after - * all the devices are suspended. - */ - if (state == PM_SUSPEND_FREEZE) { - s2idle_loop(); - goto Platform_early_resume; - } - error = disable_nonboot_cpus(); if (error || suspend_test(TEST_CPUS)) goto Enable_cpus; Index: linux-pm/kernel/power/power.h =================================================================== --- linux-pm.orig/kernel/power/power.h +++ linux-pm/kernel/power/power.h @@ -245,7 +245,11 @@ enum { #define TEST_FIRST TEST_NONE #define TEST_MAX (__TEST_AFTER_LAST - 1) +#ifdef CONFIG_PM_DEBUG extern int pm_test_level; +#else +#define pm_test_level (TEST_NONE) +#endif #ifdef CONFIG_SUSPEND_FREEZER static inline int suspend_freeze_processes(void)