From patchwork Mon Jun 13 18:11:36 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: 581645 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 256ABCCA47D for ; Mon, 13 Jun 2022 20:07:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344203AbiFMUHz (ORCPT ); Mon, 13 Jun 2022 16:07:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344627AbiFMUHB (ORCPT ); Mon, 13 Jun 2022 16:07:01 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1BCD5BD1D; Mon, 13 Jun 2022 11:41:07 -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 a4edbe782fab070e; Mon, 13 Jun 2022 20:41:06 +0200 Received: from kreacher.localnet (unknown [213.134.187.64]) (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 0589866C81D; Mon, 13 Jun 2022 20:41:04 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux ACPI Cc: LKML , Linux PM , Andy Shevchenko , Mika Westerberg , Hans de Goede , Sakari Ailus , Andreas Noever , Michael Jamet , Yehezkel Bernat , linux-usb@vger.kernel.org, Heikki Krogerus Subject: [PATCH v2 04/16] thunderbolt: ACPI: Replace tb_acpi_find_port() with acpi_find_child_by_adr() Date: Mon, 13 Jun 2022 20:11:36 +0200 Message-ID: <2851774.e9J7NaK4W3@kreacher> In-Reply-To: <2653857.mvXUDI8C0e@kreacher> References: <1843211.tdWV9SEqCh@kreacher> <2653857.mvXUDI8C0e@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.187.64 X-CLIENT-HOSTNAME: 213.134.187.64 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvfedruddujedguddviecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvffeuiedtgfdvtddugeeujedtffetteegfeekffdvfedttddtuefhgeefvdejhfenucfkphepvddufedrudefgedrudekjedrieegnecuvehluhhsthgvrhfuihiivgepfeenucfrrghrrghmpehinhgvthepvddufedrudefgedrudekjedrieegpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhnsggprhgtphhtthhopeduvddprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegrnhgurhhihidrshhhvghvtghhvghnkhhosehlihhnuhigrdhi nhhtvghlrdgtohhmpdhrtghpthhtohepmhhikhgrrdifvghsthgvrhgsvghrgheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopehhuggvghhovgguvgesrhgvughhrghtrdgtohhmpdhrtghpthhtohepshgrkhgrrhhirdgrihhluhhssehlihhnuhigrdhinhhtvghlrdgtohhmpdhrtghpthhtoheprghnughrvggrshdrnhhovghvvghrsehgmhgrihhlrdgtohhmpdhrtghpthhtohepmhhitghhrggvlhdrjhgrmhgvthesihhnthgvlhdrtghomhdprhgtphhtthhopegjvghhvgiikhgvlhfuhheusehgmhgrihhlrdgtohhmpdhrtghpthhtoheplhhinhhugidquhhssgesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehhvghikhhkihdrkhhrohhgvghruhhssehlihhnuhigrdhinhhtvghlrdgtohhm X-DCC--Metrics: v370.home.net.pl 1024; Body=12 Fuz1=12 Fuz2=12 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Rafael J. Wysocki Use acpi_find_child_by_adr() to find the child matching a given bus address instead of tb_acpi_find_port() that walks the list of children of an ACPI device directly for this purpose and drop the latter. Apart from simplifying the code, 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 Acked-by: Mika Westerberg --- v1 -> v2: * Drop tb_acpi_find_port() (Heikki, Andy). * Change the subject accordingly --- drivers/thunderbolt/acpi.c | 27 ++++----------------------- 1 file changed, 4 insertions(+), 23 deletions(-) Index: linux-pm/drivers/thunderbolt/acpi.c =================================================================== --- linux-pm.orig/drivers/thunderbolt/acpi.c +++ linux-pm/drivers/thunderbolt/acpi.c @@ -301,26 +301,6 @@ static bool tb_acpi_bus_match(struct dev return tb_is_switch(dev) || tb_is_usb4_port_device(dev); } -static struct acpi_device *tb_acpi_find_port(struct acpi_device *adev, - const struct tb_port *port) -{ - struct acpi_device *port_adev; - - if (!adev) - return NULL; - - /* - * Device routers exists under the downstream facing USB4 port - * of the parent router. Their _ADR is always 0. - */ - list_for_each_entry(port_adev, &adev->children, node) { - if (acpi_device_adr(port_adev) == port->port) - return port_adev; - } - - return NULL; -} - static struct acpi_device *tb_acpi_switch_find_companion(struct tb_switch *sw) { struct acpi_device *adev = NULL; @@ -331,7 +311,8 @@ static struct acpi_device *tb_acpi_switc struct tb_port *port = tb_port_at(tb_route(sw), parent_sw); struct acpi_device *port_adev; - port_adev = tb_acpi_find_port(ACPI_COMPANION(&parent_sw->dev), port); + port_adev = acpi_find_child_by_adr(ACPI_COMPANION(&parent_sw->dev), + port->port); if (port_adev) adev = acpi_find_child_device(port_adev, 0, false); } else { @@ -364,8 +345,8 @@ static struct acpi_device *tb_acpi_find_ if (tb_is_switch(dev)) return tb_acpi_switch_find_companion(tb_to_switch(dev)); else if (tb_is_usb4_port_device(dev)) - return tb_acpi_find_port(ACPI_COMPANION(dev->parent), - tb_to_usb4_port_device(dev)->port); + return acpi_find_child_by_adr(ACPI_COMPANION(dev->parent), + tb_to_usb4_port_device(dev)->port->port); return NULL; }