From patchwork Wed Dec 29 15:44:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 12701023 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 28F7FC433EF for ; Wed, 29 Dec 2021 15:46:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240605AbhL2PpD (ORCPT ); Wed, 29 Dec 2021 10:45:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240616AbhL2Po5 (ORCPT ); Wed, 29 Dec 2021 10:44:57 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13F48C06173E for ; Wed, 29 Dec 2021 07:44:57 -0800 (PST) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1n2b8I-0006sE-HY; Wed, 29 Dec 2021 16:44:54 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n2b8I-007KHh-4T; Wed, 29 Dec 2021 16:44:53 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1n2b8G-000162-MJ; Wed, 29 Dec 2021 16:44:52 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: William Breathitt Gray Cc: linux-iio@vger.kernel.org, kernel@pengutronix.de, Jonathan Cameron , Greg Kroah-Hartman , linux-kernel@vger.kernel.org Subject: [PATCH v3 23/23] counter: remove old and now unused registration API Date: Wed, 29 Dec 2021 16:44:41 +0100 Message-Id: <20211229154441.38045-24-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211229154441.38045-1-u.kleine-koenig@pengutronix.de> References: <20211229154441.38045-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=5703; h=from:subject; bh=d+n4DdZbQkz6lWvicNyaheFb+rPgVDrBk6eJ2FPNHVA=; b=owEBbQGS/pANAwAKAcH8FHityuwJAcsmYgBhzIJj+NcEdqt/DjAYBt+///jJf1VqDzQwBEQU4TsO Ll0kPLaJATMEAAEKAB0WIQR+cioWkBis/z50pAvB/BR4rcrsCQUCYcyCYwAKCRDB/BR4rcrsCWMcB/ 9H0crukzp2NJOXiQFRnWPtk0YaX2hx9XviQikRmf57UPC+EE8lKGYmRwo4k3N1bTNgaEHJXcAmIEcD ldm+2IHCa6SaqnXnrUBjbRdzINAncMMbuzTWso/GVLBL2yoCH62vI57CVsnioYtww8biZ5lGkyXBMR Z3uRYURSASGyRj+xF5UliMBoRBhVHJ/93zFQzQTS6CqNUTAhTt2ahyoMqu/BAq5XGvM4dvbdFNbfsv jfd5w9DJBL4Y01NgFpZhS3Yxtm6WyIRWe1oJ2ezYZVeliIiw9I/a07sUbnud2PXv5LKe92vchd7uSX Ys0e1ckCHVR6XpKsvMuG3zlpGBN379 X-Developer-Key: i=u.kleine-koenig@pengutronix.de; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-iio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Usage of counter_register() yields issues in device lifetime tracking. All drivers were converted to the new API, so the old one can go away. Reviewed-by: Jonathan Cameron Acked-by: William Breathitt Gray Signed-off-by: Uwe Kleine-König --- drivers/counter/counter-core.c | 100 ++------------------------------- include/linux/counter.h | 12 ---- 2 files changed, 4 insertions(+), 108 deletions(-) diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c index b3fa15bbcbdb..7e0957eea094 100644 --- a/drivers/counter/counter-core.c +++ b/drivers/counter/counter-core.c @@ -43,8 +43,7 @@ static void counter_device_release(struct device *dev) counter_chrdev_remove(counter); ida_free(&counter_ida, dev->id); - if (!counter->legacy_device) - kfree(container_of(counter, struct counter_device_allochelper, counter)); + kfree(container_of(counter, struct counter_device_allochelper, counter)); } static struct device_type counter_device_type = { @@ -67,76 +66,13 @@ static dev_t counter_devt; */ void *counter_priv(const struct counter_device *const counter) { - if (counter->legacy_device) { - return counter->priv; - } else { - struct counter_device_allochelper *ch = - container_of(counter, struct counter_device_allochelper, counter); + struct counter_device_allochelper *ch = + container_of(counter, struct counter_device_allochelper, counter); - return &ch->privdata; - } + return &ch->privdata; } EXPORT_SYMBOL_GPL(counter_priv); -/** - * counter_register - register Counter to the system - * @counter: pointer to Counter to register - * - * This function registers a Counter to the system. A sysfs "counter" directory - * will be created and populated with sysfs attributes correlating with the - * Counter Signals, Synapses, and Counts respectively. - * - * RETURNS: - * 0 on success, negative error number on failure. - */ -int counter_register(struct counter_device *const counter) -{ - struct device *const dev = &counter->dev; - int id; - int err; - - counter->legacy_device = true; - - /* Acquire unique ID */ - id = ida_alloc(&counter_ida, GFP_KERNEL); - if (id < 0) - return id; - - mutex_init(&counter->ops_exist_lock); - - /* Configure device structure for Counter */ - dev->id = id; - dev->type = &counter_device_type; - dev->bus = &counter_bus_type; - dev->devt = MKDEV(MAJOR(counter_devt), id); - if (counter->parent) { - dev->parent = counter->parent; - dev->of_node = counter->parent->of_node; - } - device_initialize(dev); - - err = counter_sysfs_add(counter); - if (err < 0) - goto err_free_id; - - err = counter_chrdev_add(counter); - if (err < 0) - goto err_free_id; - - err = cdev_device_add(&counter->chrdev, dev); - if (err < 0) - goto err_remove_chrdev; - - return 0; - -err_remove_chrdev: - counter_chrdev_remove(counter); -err_free_id: - put_device(dev); - return err; -} -EXPORT_SYMBOL_GPL(counter_register); - /** * counter_alloc - allocate a counter_device * @sizeof_priv: size of the driver private data @@ -245,9 +181,6 @@ void counter_unregister(struct counter_device *const counter) wake_up(&counter->events_wait); mutex_unlock(&counter->ops_exist_lock); - - if (counter->legacy_device) - put_device(&counter->dev); } EXPORT_SYMBOL_GPL(counter_unregister); @@ -256,31 +189,6 @@ static void devm_counter_release(void *counter) counter_unregister(counter); } -/** - * devm_counter_register - Resource-managed counter_register - * @dev: device to allocate counter_device for - * @counter: pointer to Counter to register - * - * Managed counter_register. The Counter registered with this function is - * automatically unregistered on driver detach. This function calls - * counter_register internally. Refer to that function for more information. - * - * RETURNS: - * 0 on success, negative error number on failure. - */ -int devm_counter_register(struct device *dev, - struct counter_device *const counter) -{ - int err; - - err = counter_register(counter); - if (err < 0) - return err; - - return devm_add_action_or_reset(dev, devm_counter_release, counter); -} -EXPORT_SYMBOL_GPL(devm_counter_register); - static void devm_counter_put(void *counter) { counter_put(counter); diff --git a/include/linux/counter.h b/include/linux/counter.h index f1350a43cd48..9afa0f1e9cea 100644 --- a/include/linux/counter.h +++ b/include/linux/counter.h @@ -314,8 +314,6 @@ struct counter_device { struct counter_comp *ext; size_t num_ext; - void *priv; - struct device dev; struct cdev chrdev; struct list_head events_list; @@ -327,25 +325,15 @@ struct counter_device { spinlock_t events_in_lock; struct mutex events_out_lock; struct mutex ops_exist_lock; - - /* - * This can go away once all drivers are converted to - * counter_alloc()/counter_add(). - */ - bool legacy_device; }; void *counter_priv(const struct counter_device *const counter); -int counter_register(struct counter_device *const counter); - struct counter_device *counter_alloc(size_t sizeof_priv); void counter_put(struct counter_device *const counter); int counter_add(struct counter_device *const counter); void counter_unregister(struct counter_device *const counter); -int devm_counter_register(struct device *dev, - struct counter_device *const counter); struct counter_device *devm_counter_alloc(struct device *dev, size_t sizeof_priv); int devm_counter_add(struct device *dev,