From patchwork Mon May 9 23:32:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12844168 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 CAAA2C43219 for ; Mon, 9 May 2022 23:34:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232966AbiEIXiC (ORCPT ); Mon, 9 May 2022 19:38:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232620AbiEIXhY (ORCPT ); Mon, 9 May 2022 19:37:24 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EAB4521B169; Mon, 9 May 2022 16:33:19 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id 17BD61F41D8C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1652139198; bh=95ioqXFiu/sMhB4rC2pN2mOqsgk/IiTVsJJFignNnOY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kd6IbYNbTMtYO8XHzDROg022CiuVMjD14vclGIX2y/UPqQJTY83k+AAQHlzWmnvvY DIbOq+AJ+ca0dm9KVPtIZY6LIwJR0dvHVODvj+gWmFv2rrA23tSPFfLb/Ld7WXpuF/ H2du8HyPkBmRsP8eQLukPdey+A1NM1blJJ0oKFmsjrsM19cx1w60DHdJiFj+BNJHgA CT2Gw205sJVKh3AqToaLUeLHth6M3pyFt+gPqA8mU19vHxX0uyWcQDKqZ8zNR9Nmqu cRtxZ2gdReA9506AcmJOJiJA6+rn1NttYLHyho2AlivK1XjmQN+dXmlaF9eF72LNY1 oD4iLEbpsl5mw== From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Russell King , Catalin Marinas , Will Deacon , Guo Ren , Geert Uytterhoeven , Greg Ungerer , Joshua Thompson , Thomas Bogendoerfer , Sebastian Reichel , Linus Walleij , Philipp Zabel , Greentime Hu , Vincent Chen , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Yoshinori Sato , Rich Felker , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , "Rafael J. Wysocki" , Len Brown , Santosh Shilimkar , Krzysztof Kozlowski , Liam Girdwood , Mark Brown , Pavel Machek , Lee Jones , Andrew Morton , Guenter Roeck , Daniel Lezcano , Andy Shevchenko , Ulf Hansson , =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Cc: linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, xen-devel@lists.xenproject.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v8 04/27] kernel/reboot: Wrap legacy power-off callbacks into sys-off handlers Date: Tue, 10 May 2022 02:32:12 +0300 Message-Id: <20220509233235.995021-5-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220509233235.995021-1-dmitry.osipenko@collabora.com> References: <20220509233235.995021-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org Wrap legacy power-off callbacks into sys-off handlers in order to support co-existence of both legacy and new callbacks while we're in process of upgrading legacy callbacks to the new API. Signed-off-by: Dmitry Osipenko --- kernel/reboot.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 42 insertions(+), 2 deletions(-) diff --git a/kernel/reboot.c b/kernel/reboot.c index 672a658f21ee..2fb0357d9483 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -463,6 +463,47 @@ int devm_register_sys_off_handler(struct device *dev, } EXPORT_SYMBOL_GPL(devm_register_sys_off_handler); +static int legacy_pm_power_off_prepare(struct sys_off_data *data) +{ + if (pm_power_off_prepare) + pm_power_off_prepare(); + + return NOTIFY_DONE; +} + +static int legacy_pm_power_off(struct sys_off_data *data) +{ + if (pm_power_off) + pm_power_off(); + + return NOTIFY_DONE; +} + +/* + * Register sys-off handlers for legacy PM callbacks. This allows legacy + * PM callbacks co-exist with the new sys-off API. + * + * TODO: Remove legacy handlers once all legacy PM users will be switched + * to the sys-off based APIs. + */ +static int __init legacy_pm_init(void) +{ + register_sys_off_handler(SYS_OFF_MODE_POWER_OFF_PREPARE, + SYS_OFF_PRIO_DEFAULT, + legacy_pm_power_off_prepare, NULL); + + register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_DEFAULT, + legacy_pm_power_off, NULL); + + return 0; +} +core_initcall(legacy_pm_init); + +static void do_kernel_power_off_prepare(void) +{ + blocking_notifier_call_chain(&power_off_prep_handler_list, 0, NULL); +} + /** * kernel_power_off - power_off the system * @@ -471,8 +512,7 @@ EXPORT_SYMBOL_GPL(devm_register_sys_off_handler); void kernel_power_off(void) { kernel_shutdown_prepare(SYSTEM_POWER_OFF); - if (pm_power_off_prepare) - pm_power_off_prepare(); + do_kernel_power_off_prepare(); migrate_to_reboot_cpu(); syscore_shutdown(); pr_emerg("Power down\n");