From patchwork Mon Nov 7 20:03:06 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: 622689 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 05F44C4332F for ; Mon, 7 Nov 2022 20:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232741AbiKGUDi (ORCPT ); Mon, 7 Nov 2022 15:03:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231398AbiKGUDh (ORCPT ); Mon, 7 Nov 2022 15:03:37 -0500 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56F7F178BB; Mon, 7 Nov 2022 12:03:35 -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 0badc597a4899159; Mon, 7 Nov 2022 21:03:31 +0100 Received: from kreacher.localnet (unknown [213.134.188.205]) (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 D8CB46682BE; Mon, 7 Nov 2022 21:03:30 +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 Subject: [PATCH v1 5/5] rtc: rtc-cmos: Disable ACPI RTC event on removal Date: Mon, 07 Nov 2022 21:03:06 +0100 Message-ID: <2219830.iZASKD2KPV@kreacher> In-Reply-To: <2276401.ElGaqSPkdT@kreacher> References: <2276401.ElGaqSPkdT@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.188.205 X-CLIENT-HOSTNAME: 213.134.188.205 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvgedrvdekgddufedtucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgjfhgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepvdffueeitdfgvddtudegueejtdffteetgeefkeffvdeftddttdeuhfegfedvjefhnecukfhppedvudefrddufeegrddukeekrddvtdehnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudekkedrvddthedphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepkedprhgtphhtthhopegrlhgvgigrnhgurhgvrdgsvghllhhonhhisegsohhothhlihhnrdgtohhmpdhrtghpthhtoheplhhinhhugidqrhhttgesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgv lhdrohhrghdprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehruhhirdiihhgrnhhgsehinhhtvghlrdgtohhmpdhrtghpthhtoheprgdriihumhhmohesthhofigvrhhtvggthhdrihhtpdhrtghpthhtoheprghnughrihihrdhshhgvvhgthhgvnhhkoheslhhinhhugidrihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 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. While at it, make cmos_do_remove() also clear the driver data pointer of the device and make cmos_acpi_wake_setup() do that in the error path too. Signed-off-by: Rafael J. Wysocki --- 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 +798,12 @@ static inline void acpi_rtc_event_setup( acpi_disable_event(ACPI_EVENT_RTC, 0); } +static inline void acpi_rtc_event_cleanup(void) +{ + if (!acpi_disabled) + 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 +890,10 @@ static inline void acpi_rtc_event_setup( { } +static inline void acpi_rtc_event_cleanup(void) +{ +} + static inline void cmos_acpi_wake_setup(struct device *dev) { } @@ -1109,6 +1119,7 @@ cleanup2: free_irq(rtc_irq, cmos_rtc.rtc); cleanup1: cmos_rtc.dev = NULL; + dev_set_drvdata(dev, NULL); cleanup0: if (RTC_IOMAPPED) release_region(ports->start, resource_size(ports)); @@ -1138,6 +1149,9 @@ 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; @@ -1148,6 +1162,7 @@ static void cmos_do_remove(struct device cmos->iomem = NULL; cmos->dev = NULL; + dev_set_drvdata(dev, NULL); } static int cmos_aie_poweroff(struct device *dev)