From patchwork Sat Feb 13 11:58:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vaittinen, Matti" X-Patchwork-Id: 12086683 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15ACFC433E0 for ; Sat, 13 Feb 2021 11:59:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D22736023B for ; Sat, 13 Feb 2021 11:59:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229531AbhBML7I (ORCPT ); Sat, 13 Feb 2021 06:59:08 -0500 Received: from mail-lf1-f50.google.com ([209.85.167.50]:33776 "EHLO mail-lf1-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229580AbhBML7I (ORCPT ); Sat, 13 Feb 2021 06:59:08 -0500 Received: by mail-lf1-f50.google.com with SMTP id b2so3338062lfq.0; Sat, 13 Feb 2021 03:58:50 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition; bh=GosurqFqirHdQWyzX6cWeJ6swt8DHy8QXcFDoJi5ZkU=; b=OSpgtWiaMP41tltyjBK9m9F26XZGhn3fjci5HPUz+Dh1HmYxE3YJlwn25YBfr80MVo w9blByx/FQDPVdXecmairzfHmeqCp2j8tjDBHHePneZYXcZ6qPGFPWZs4WuVPTfgrWMi zCVHA2g2TVd+Buc/8SG7QB9mLpq3/LXzJmu6Xzn8p1u32Wrv7bYrZGIRaZenT+0qOayn eZldQUnGvhKXd7+TnyMxy0FxqQ2oQ86pQajeAIxVizLxQW1r2JWPPdTKaBi1w+7VyRMg MubGOrtVNJxBDtXla/J7ag873GWnFd45sRaupzyhUv0LOLT1USmrrZKHk+kiJTagCeSl IeOA== X-Gm-Message-State: AOAM533T/+wiY0e1JXAhUiT5BF7l0Dtuw/2umlLJr7MUb9G1nTcWC18N gbNSv7htTlGsGUtWM3QDng4= X-Google-Smtp-Source: ABdhPJzkMegmGR3Q1jpC7ira2DsUWneGtFG/3HdAvrJEBdUAnT0Wtr1aUFM0Qwze3n3LrKxXHRY7jw== X-Received: by 2002:a05:6512:3741:: with SMTP id a1mr3794390lfs.137.1613217505179; Sat, 13 Feb 2021 03:58:25 -0800 (PST) Received: from localhost.localdomain (dc7vkhyyyyyyyyyyyyycy-3.rev.dnainternet.fi. [2001:14ba:16e2:8300::4]) by smtp.gmail.com with ESMTPSA id r6sm1853428lfc.8.2021.02.13.03.58.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 13 Feb 2021 03:58:24 -0800 (PST) Date: Sat, 13 Feb 2021 13:58:17 +0200 From: Matti Vaittinen To: mazziesaccount@gmail.com, matti.vaittinen@fi.rohmeurope.com Cc: Greg Kroah-Hartman , "Rafael J. Wysocki" , MyungJoo Ham , Chanwoo Choi , Andy Gross , Bjorn Andersson , Jean Delvare , Guenter Roeck , Hans de Goede , Mark Gross , Sebastian Reichel , Chen-Yu Tsai , Liam Girdwood , Mark Brown , Wim Van Sebroeck , Saravana Kannan , Heikki Krogerus , Andy Shevchenko , Joerg Roedel , Dan Williams , Bartosz Golaszewski , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-hwmon@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org, linux-watchdog@vger.kernel.org Subject: [RFC PATCH 0/7] Add managed version of delayed work init Message-ID: MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org It's not rare that device drivers need delayed work. It's not rare that this work needs driver's data. Often this means that driver must ensure the work is not queued when driver exits. Usually this is done by ensuring new work is not added and then calling cancel_delayed_work_sync() at remove(). In many cases this may also require cleanup at probe error path - which is easy to forget. It might be helpful for (a) few drivers if there was a work init function which would ensure cancel_delayed_work_sync() is called at driver exit. So this series implements one on top of devm and replaces the obvious cases where only thing remove call-back in a driver does is cancelling the work. There might be other cases where we could switch more than just work cancellation to use managed version and thus get rid of remove. Main reson why this is RFC is that I had hard time deciding where this function should be introduced. It's not nice to include all device stuff in workqueue - because many workqueue users are not interested in devices. In same way, not all of the devices are interested in WQs. OTOH, adding own file just for this sounds like an overkill. This time I decided that it is more correct that devices use WQs than that WQs use devices. Hence the function is introduced in include/linux/device.h and drivers/base/devres.c --- Matti Vaittinen (7): drivers: base: Add resource managed version of delayed work init extconn: Clean-up few drivers by using managed work init hwmon: raspberry-pi: Clean-up few drivers by using managed work init platform/x86: gpd pocket fan: Clean-up by using managed work init power: supply: Clean-up few drivers by using managed work init regulator: qcom_spmi-regulator: Clean-up by using managed work init watchdog: retu_wdt: Clean-up by using managed work init drivers/base/devres.c | 33 ++++++++++++++++++++ drivers/extcon/extcon-gpio.c | 14 ++------- drivers/extcon/extcon-intel-int3496.c | 15 ++------- drivers/extcon/extcon-palmas.c | 16 +++------- drivers/extcon/extcon-qcom-spmi-misc.c | 16 +++------- drivers/hwmon/raspberrypi-hwmon.c | 16 +++------- drivers/platform/x86/gpd-pocket-fan.c | 16 +++------- drivers/power/supply/axp20x_usb_power.c | 15 +++------ drivers/power/supply/bq24735-charger.c | 17 +++------- drivers/power/supply/ltc2941-battery-gauge.c | 19 ++++------- drivers/power/supply/sbs-battery.c | 15 +++------ drivers/regulator/qcom_spmi-regulator.c | 33 +++++--------------- drivers/watchdog/retu_wdt.c | 21 +++---------- include/linux/device.h | 5 +++ 14 files changed, 95 insertions(+), 156 deletions(-) base-commit: 92bf22614b21a2706f4993b278017e437f7785b3