From patchwork Wed Nov 9 12:15:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 623362 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 7B3E3C43217 for ; Wed, 9 Nov 2022 12:15:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229874AbiKIMPu (ORCPT ); Wed, 9 Nov 2022 07:15:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229509AbiKIMPt (ORCPT ); Wed, 9 Nov 2022 07:15:49 -0500 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D07F13E9E; Wed, 9 Nov 2022 04:15:47 -0800 (PST) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.0.0) id f64f02712e042cbc; Wed, 9 Nov 2022 13:15:44 +0100 Received: from kreacher.localnet (unknown [213.134.163.195]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 0EB3C66EBA7; Wed, 9 Nov 2022 13:15:44 +0100 (CET) Authentication-Results: v370.home.net.pl; dmarc=none (p=none dis=none) header.from=rjwysocki.net Authentication-Results: v370.home.net.pl; spf=fail smtp.mailfrom=rjwysocki.net From: "Rafael J. Wysocki" To: Alexandre Belloni , linux-rtc@vger.kernel.org Cc: Linux ACPI , LKML , Linux PM , Zhang Rui , Alessandro Zummo , Andy Shevchenko , Bjorn Helgaas Subject: [PATCH v2 5/5] rtc: rtc-cmos: Disable ACPI RTC event on removal Date: Wed, 09 Nov 2022 13:15:36 +0100 Message-ID: <2224609.iZASKD2KPV@kreacher> In-Reply-To: <5640233.DvuYhMxLoT@kreacher> References: <5640233.DvuYhMxLoT@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.163.195 X-CLIENT-HOSTNAME: 213.134.163.195 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvgedrfedvgdefjecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvffeuiedtgfdvtddugeeujedtffetteegfeekffdvfedttddtuefhgeefvdejhfenucfkphepvddufedrudefgedrudeifedrudelheenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvudefrddufeegrdduieefrdduleehpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhnsggprhgtphhtthhopeelpdhrtghpthhtoheprghlvgigrghnughrvgdrsggvlhhlohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopehlihhnuhigqdhrthgtsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqrggtphhisehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghl rdhorhhgpdhrtghpthhtoheplhhinhhugidqphhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprhhuihdriihhrghnghesihhnthgvlhdrtghomhdprhgtphhtthhopegrrdiiuhhmmhhosehtohifvghrthgvtghhrdhithdprhgtphhtthhopegrnhgurhhihidrshhhvghvtghhvghnkhhosehlihhnuhigrdhinhhtvghlrdgtohhmpdhrtghpthhtohephhgvlhhgrggrsheskhgvrhhnvghlrdhorhhg X-DCC--Metrics: v370.home.net.pl 1024; Body=9 Fuz1=9 Fuz2=9 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Rafael J. Wysocki Make cmos_do_remove() drop the ACPI RTC fixed event handler so as to prevent it from operating on stale data in case the event triggers after driver removal. Fixes: 311ee9c151ad ("rtc: cmos: allow using ACPI for RTC alarm instead of HPET") Signed-off-by: Rafael J. Wysocki --- v1 -> v2: * Do not clear the driver data pointer (the driver core does that) (Andy) * Adjust the code pattern in acpi_rtc_event_cleanup() (Andy) * Drop inline from the full definition of acpi_rtc_event_cleanup() --- drivers/rtc/rtc-cmos.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) Index: linux-pm/drivers/rtc/rtc-cmos.c =================================================================== --- linux-pm.orig/drivers/rtc/rtc-cmos.c +++ linux-pm/drivers/rtc/rtc-cmos.c @@ -798,6 +798,14 @@ static void acpi_rtc_event_setup(struct acpi_disable_event(ACPI_EVENT_RTC, 0); } +static void acpi_rtc_event_cleanup(void) +{ + if (acpi_disabled) + return; + + acpi_remove_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler); +} + static void rtc_wake_on(struct device *dev) { acpi_clear_event(ACPI_EVENT_RTC); @@ -884,6 +892,10 @@ static inline void acpi_rtc_event_setup( { } +static inline void acpi_rtc_event_cleanup(void) +{ +} + static inline void acpi_cmos_wake_setup(struct device *dev) { } @@ -1138,6 +1150,9 @@ static void cmos_do_remove(struct device hpet_unregister_irq_handler(cmos_interrupt); } + if (!dev_get_platdata(dev)) + acpi_rtc_event_cleanup(); + cmos->rtc = NULL; ports = cmos->iomem;