From patchwork Thu Jun 9 13:58:24 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: 580486 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 61E0AC433EF for ; Thu, 9 Jun 2022 14:21:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245392AbiFIOVb (ORCPT ); Thu, 9 Jun 2022 10:21:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244867AbiFIOUv (ORCPT ); Thu, 9 Jun 2022 10:20:51 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8A532C369A; Thu, 9 Jun 2022 07:20:48 -0700 (PDT) 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 85a8a82d3f3e703d; Thu, 9 Jun 2022 16:20:47 +0200 Received: from kreacher.localnet (unknown [213.134.186.232]) (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 155AD66C7CA; Thu, 9 Jun 2022 16:20:46 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux ACPI Cc: LKML , Linux PM , Andy Shevchenko , Mika Westerberg , Hans de Goede , Sakari Ailus Subject: [PATCH v1 06/16] ACPI: container: Use acpi_dev_for_each_child() Date: Thu, 09 Jun 2022 15:58:24 +0200 Message-ID: <3131424.5fSG56mABF@kreacher> In-Reply-To: <1843211.tdWV9SEqCh@kreacher> References: <1843211.tdWV9SEqCh@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.186.232 X-CLIENT-HOSTNAME: 213.134.186.232 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvfedruddtledgjeduucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgjfhgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepvdffueeitdfgvddtudegueejtdffteetgeefkeffvdeftddttdeuhfegfedvjefhnecukfhppedvudefrddufeegrddukeeirddvfedvnecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvddufedrudefgedrudekiedrvdefvddphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepjedprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegrnhgurhhihidrshhhvghvtghhvghnkhhosehlihhnuhigrdhi nhhtvghlrdgtohhmpdhrtghpthhtohepmhhikhgrrdifvghsthgvrhgsvghrgheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopehhuggvghhovgguvgesrhgvughhrghtrdgtohhmpdhrtghpthhtohepshgrkhgrrhhirdgrihhluhhssehlihhnuhigrdhinhhtvghlrdgtohhm X-DCC--Metrics: v370.home.net.pl 1024; Body=7 Fuz1=7 Fuz2=7 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Rafael J. Wysocki Instead of walking the list of children of an ACPI device directly, use acpi_dev_for_each_child() to carry out an action for all of the given ACPI device's children. This will help to eliminate the children list head from struct acpi_device as it is redundant and it is used in questionable ways in some places (in particular, locking is needed for walking the list pointed to it safely, but it is often missing). Signed-off-by: Rafael J. Wysocki --- drivers/acpi/container.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) Index: linux-pm/drivers/acpi/container.c =================================================================== --- linux-pm.orig/drivers/acpi/container.c +++ linux-pm/drivers/acpi/container.c @@ -23,17 +23,19 @@ static const struct acpi_device_id conta #ifdef CONFIG_ACPI_CONTAINER -static int acpi_container_offline(struct container_dev *cdev) +static int check_offline(struct acpi_device *adev, void *not_used) { - struct acpi_device *adev = ACPI_COMPANION(&cdev->dev); - struct acpi_device *child; + if (acpi_scan_is_offline(adev, false)) + return 0; - /* Check all of the dependent devices' physical companions. */ - list_for_each_entry(child, &adev->children, node) - if (!acpi_scan_is_offline(child, false)) - return -EBUSY; + return -EBUSY; +} - return 0; +static int acpi_container_offline(struct container_dev *cdev) +{ + /* Check all of the dependent devices' physical companions. */ + return acpi_dev_for_each_child(ACPI_COMPANION(&cdev->dev), + check_offline, NULL); } static void acpi_container_release(struct device *dev)