From patchwork Thu May 5 01:58:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 570894 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BA2AC4167E for ; Thu, 5 May 2022 01:58:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237012AbiEECCW (ORCPT ); Wed, 4 May 2022 22:02:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237022AbiEECCS (ORCPT ); Wed, 4 May 2022 22:02:18 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E04B1517D7; Wed, 4 May 2022 18:58:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1651715913; x=1683251913; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4y+SqlpkERJz24KIBdtwYj/W11USKE8UV94SQY//KAI=; b=O9PMPZAKmqpVI4n5s2+vg6bRtUe4ZqDf7yCNr88Zz6MoXx8XjiN2texa pIrX/H/zd9N9LEl8e0oSl3sK4i4BU5Dfd/sms6hv0kJtQD3LSE3hjL7pc oq409nS2WD+U1lMvtFbVHBemhrCwAdQtzzdR1whvzg3v7QB0o/MCbrHXx qhPKUbIDuLi9gSIpquxpz8toNKzp6R9q/U6R4iECwL7ZyH0fOX7WKdEnd 0Q2SnO/vpZf4p3Xt8AYvlSwrrcwc+/Vz9uCYizhxZPGeJmCCVPkH14996 8/wHXJWbBNIeU+w52OJHYtqPj7EQe1yUNsD1k4uDGm00dKm76f9GOBMts A==; X-IronPort-AV: E=McAfee;i="6400,9594,10337"; a="293153497" X-IronPort-AV: E=Sophos;i="5.91,199,1647327600"; d="scan'208";a="293153497" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2022 18:58:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,199,1647327600"; d="scan'208";a="537106028" Received: from rzhang1-dev.sh.intel.com ([10.239.48.43]) by orsmga006.jf.intel.com with ESMTP; 04 May 2022 18:58:30 -0700 From: Zhang Rui To: rjw@rjwysocki.net, kvalo@kernel.org, alexandre.belloni@bootlin.com Cc: linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-rtc@vger.kernel.org, linux-wireless@vger.kernel.org, daniel.lezcano@linaro.org, merez@codeaurora.org, mat.jonczyk@o2.pl, sumeet.r.pawnikar@intel.com, len.brown@intel.com Subject: [PATCH 6/7] PM: suspend: introduce PM_SUSPEND_LATE event Date: Thu, 5 May 2022 09:58:13 +0800 Message-Id: <20220505015814.3727692-7-rui.zhang@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220505015814.3727692-1-rui.zhang@intel.com> References: <20220505015814.3727692-1-rui.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org In some cases, special handling is needed after the .suspend_noirq phase. Introduce a new suspend event PM_SUSPEND_LATE and call the notifier chain for this purpose. Signed-off-by: Zhang Rui Tested-by: Sumeet Pawnikar --- include/linux/suspend.h | 1 + kernel/power/suspend.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/include/linux/suspend.h b/include/linux/suspend.h index 300273ff40cc..01ec171e8f60 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -477,6 +477,7 @@ static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ #define PM_POST_RESTORE 0x0006 /* Restore failed */ +#define PM_SUSPEND_LATE 0x0007 /* Late suspend phase */ extern struct mutex system_transition_mutex; diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 6fcdee7e87a5..3c662acc908f 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -415,6 +415,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) if (suspend_test(TEST_PLATFORM)) goto Platform_wake; + pm_notifier_call_chain(PM_SUSPEND_LATE); + if (state == PM_SUSPEND_TO_IDLE) { s2idle_loop(); goto Platform_wake;