From patchwork Wed Mar 29 19:38:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13193159 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 61FFBC6FD18 for ; Wed, 29 Mar 2023 19:41:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229913AbjC2Tkt (ORCPT ); Wed, 29 Mar 2023 15:40:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230268AbjC2Tkk (ORCPT ); Wed, 29 Mar 2023 15:40:40 -0400 Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CDD64EEA; Wed, 29 Mar 2023 12:40:31 -0700 (PDT) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.west.internal (Postfix) with ESMTP id 3EAD43200319; Wed, 29 Mar 2023 15:40:30 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Wed, 29 Mar 2023 15:40:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h=cc :cc:content-transfer-encoding:content-type:content-type:date :date:from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:sender:subject:subject:to:to; s=fm3; t= 1680118829; x=1680205229; bh=oCRtzMP0uhnHc8NSGY+rMiPyQyD8My/WGPc wgMYk0ag=; b=Paflhy5zi3TirIwPS2HTxoOiDlOG02CcTSdYq1blKtVgdvYLgo+ 4/G3wzIli762MPh/EKPzUgd0knSEJMoD1vCg3eqFbfuvwKi1k/7DHaobJ6tvlHao vqE8EE2d89sRs3ywffKbDgMV/8IJ2/mzWK1SvU1pveGPtfRUCoGc/FEgGuU2b4ov eeYx0deL6hLxPaqRHfYLtC/Hve9mW3YSse1PlZRXAuJVvOw7OjLBhqu9DqfDfyyb 6TWsZxFEHut5HP4F3YUvegp2Z8cbAW1X+cPSMcDkYz1ZuSsTmf2IEDWZTiqp8x0T cfeZ+he3xZlI4SpejfNm17be6R6YUgs+oww== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:content-type:date:date:feedback-id:feedback-id :from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:sender:subject:subject:to:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; t= 1680118829; x=1680205229; bh=oCRtzMP0uhnHc8NSGY+rMiPyQyD8My/WGPc wgMYk0ag=; b=Zgx40hjLjF76VIwFo91xBQpFe2jCR8dhTe+wGrVnReOj0gTCX1O qZpXb6RAN7ided81NzRE/V2Nrtk525hZHIO+MN9GRzsYMw0UF09mIpTIgvP9IZqK 5TG55qQO+YjZdF8adkQpW/XofFmiSsHUMx9wGdFpemvV0jLSJur+0DdI6jW2+L1p p8jDCIzwJt1f8ePFxlaE1qKklXTTz8zGipjACIlvfaFClSogGHF4acTOlzeGVGs0 NuBtUGIycLYceU9LCXrD+TwK21tRsYMaCWNIhpqF7K9elYFLPxKxW930y4yVdhu3 3mf6wVCVzOuR7RsO58GV0L0ydQ2UUdtRhqw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdehiedgudegvdcutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgr gihimhgvucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtf frrghtthgvrhhnpeevvdelieejgedvkeffheekheeilefhgefgffehteekueelvddtueff heetledtffenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhroh hmpehmrgigihhmvgestggvrhhnohdrthgvtghh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 29 Mar 2023 15:40:29 -0400 (EDT) From: Maxime Ripard Date: Wed, 29 Mar 2023 20:38:32 +0100 Subject: [PATCH 2/2] drivers: base: Add basic devm tests for platform devices MIME-Version: 1.0 Message-Id: <20230329-kunit-devm-inconsistencies-test-v1-2-c33127048375@cerno.tech> References: <20230329-kunit-devm-inconsistencies-test-v1-0-c33127048375@cerno.tech> In-Reply-To: <20230329-kunit-devm-inconsistencies-test-v1-0-c33127048375@cerno.tech> To: Greg Kroah-Hartman , "Rafael J. Wysocki" Cc: Brendan Higgins , David Gow , linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, Maxime Ripard X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=9290; i=maxime@cerno.tech; h=from:subject:message-id; bh=9kHOXiUf2EZjMq29pOLHYOOkBT4xdY/UjBx4g2N5FhM=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCkqk3dFyOuzavx9HVJx8PqvLAueA3/f6y7MaTo3ocEzn Sl0zj6ujlIWBjEuBlkxRZYYYfMlcadmve5k45sHM4eVCWQIAxenAEykwYaR4dGJxBc3jqk6pXVz THpnxZqy4GrT4oLCwBf1VTsa9aoX9jD8M+UUje5nd33FJ/pWaE75XbvdSZPXLDrRXacvdjz5dw8 jMwA= X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Platform devices show some inconsistencies with how devm resources are released when the device has been probed and when it hasn't. Let's add a few tests to exercise thos paths and odd cases. Signed-off-by: Maxime Ripard --- drivers/base/test/Makefile | 1 + drivers/base/test/platform-device-test.c | 278 +++++++++++++++++++++++++++++++ 2 files changed, 279 insertions(+) diff --git a/drivers/base/test/Makefile b/drivers/base/test/Makefile index d589ca3fa8fc..e321dfc7e922 100644 --- a/drivers/base/test/Makefile +++ b/drivers/base/test/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_TEST_ASYNC_DRIVER_PROBE) += test_async_driver_probe.o obj-$(CONFIG_DM_KUNIT_TEST) += root-device-test.o +obj-$(CONFIG_DM_KUNIT_TEST) += platform-device-test.o obj-$(CONFIG_DRIVER_PE_KUNIT_TEST) += property-entry-test.o CFLAGS_property-entry-test.o += $(DISABLE_STRUCTLEAK_PLUGIN) diff --git a/drivers/base/test/platform-device-test.c b/drivers/base/test/platform-device-test.c new file mode 100644 index 000000000000..2779c6dfac06 --- /dev/null +++ b/drivers/base/test/platform-device-test.c @@ -0,0 +1,278 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +#include +#include + +#define DEVICE_NAME "test" + +struct test_priv { + bool probe_done; + bool release_done; + wait_queue_head_t release_wq; + struct device *dev; +}; + +static void devm_device_action(void *ptr) +{ + struct test_priv *priv = ptr; + + priv->release_done = true; + wake_up_interruptible(&priv->release_wq); +} + +static void devm_put_device_action(void *ptr) +{ + struct test_priv *priv = ptr; + + put_device(priv->dev); + priv->release_done = true; + wake_up_interruptible(&priv->release_wq); +} + +#define RELEASE_TIMEOUT_MS 500 + +static void platform_device_devm_register_unregister_test(struct kunit *test) +{ + struct platform_device *pdev; + struct test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + init_waitqueue_head(&priv->release_wq); + + pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + ret = platform_device_add(pdev); + KUNIT_ASSERT_EQ(test, ret, 0); + + priv->dev = &pdev->dev; + + ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv); + KUNIT_ASSERT_EQ(test, ret, 0); + + platform_device_unregister(pdev); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_EXPECT_GT(test, ret, 0); +} + +static void platform_device_devm_register_get_put_unregister_test(struct kunit *test) +{ + struct platform_device *pdev; + struct test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + init_waitqueue_head(&priv->release_wq); + + pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + ret = platform_device_add(pdev); + KUNIT_ASSERT_EQ(test, ret, 0); + + priv->dev = &pdev->dev; + + get_device(priv->dev); + + ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv); + KUNIT_ASSERT_EQ(test, ret, 0); + + put_device(priv->dev); + + platform_device_unregister(pdev); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_EXPECT_GT(test, ret, 0); +} + +static void platform_device_devm_register_get_unregister_with_devm_test(struct kunit *test) +{ + struct platform_device *pdev; + struct test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + init_waitqueue_head(&priv->release_wq); + + pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + ret = platform_device_add(pdev); + KUNIT_ASSERT_EQ(test, ret, 0); + + priv->dev = &pdev->dev; + + get_device(priv->dev); + + ret = devm_add_action_or_reset(priv->dev, devm_put_device_action, priv); + KUNIT_ASSERT_EQ(test, ret, 0); + + platform_device_unregister(pdev); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_EXPECT_GT(test, ret, 0); +} + +static int fake_probe(struct platform_device *pdev) +{ + struct test_priv *priv = platform_get_drvdata(pdev); + + priv->probe_done = true; + wake_up_interruptible(&priv->release_wq); + + return 0; +} + +static struct platform_driver fake_driver = { + .probe = fake_probe, + .driver = { + .name = DEVICE_NAME, + }, +}; + +static void probed_platform_device_devm_register_unregister_test(struct kunit *test) +{ + struct platform_device *pdev; + struct test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + init_waitqueue_head(&priv->release_wq); + + ret = platform_driver_register(&fake_driver); + KUNIT_ASSERT_EQ(test, ret, 0); + + pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + priv->dev = &pdev->dev; + platform_set_drvdata(pdev, priv); + + ret = platform_device_add(pdev); + KUNIT_ASSERT_EQ(test, ret, 0); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->probe_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_ASSERT_GT(test, ret, 0); + + ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv); + KUNIT_ASSERT_EQ(test, ret, 0); + + platform_device_unregister(pdev); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_EXPECT_GT(test, ret, 0); + + platform_driver_unregister(&fake_driver); +} + +static void probed_platform_device_devm_register_get_put_unregister_test(struct kunit *test) +{ + struct platform_device *pdev; + struct test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + init_waitqueue_head(&priv->release_wq); + + ret = platform_driver_register(&fake_driver); + KUNIT_ASSERT_EQ(test, ret, 0); + + pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + priv->dev = &pdev->dev; + platform_set_drvdata(pdev, priv); + + ret = platform_device_add(pdev); + KUNIT_ASSERT_EQ(test, ret, 0); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->probe_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_ASSERT_GT(test, ret, 0); + + get_device(priv->dev); + + ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv); + KUNIT_ASSERT_EQ(test, ret, 0); + + put_device(priv->dev); + + platform_device_unregister(pdev); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_EXPECT_GT(test, ret, 0); + + platform_driver_unregister(&fake_driver); +} + +static void probed_platform_device_devm_register_get_unregister_with_devm_test(struct kunit *test) +{ + struct platform_device *pdev; + struct test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + init_waitqueue_head(&priv->release_wq); + + ret = platform_driver_register(&fake_driver); + KUNIT_ASSERT_EQ(test, ret, 0); + + pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + priv->dev = &pdev->dev; + platform_set_drvdata(pdev, priv); + + ret = platform_device_add(pdev); + KUNIT_ASSERT_EQ(test, ret, 0); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->probe_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_ASSERT_GT(test, ret, 0); + + get_device(priv->dev); + + ret = devm_add_action_or_reset(priv->dev, devm_put_device_action, priv); + KUNIT_ASSERT_EQ(test, ret, 0); + + platform_device_unregister(pdev); + + ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done, + msecs_to_jiffies(RELEASE_TIMEOUT_MS)); + KUNIT_EXPECT_GT(test, ret, 0); + + platform_driver_unregister(&fake_driver); +} + +static struct kunit_case platform_device_devm_tests[] = { + KUNIT_CASE(platform_device_devm_register_unregister_test), + KUNIT_CASE(platform_device_devm_register_get_put_unregister_test), + KUNIT_CASE(platform_device_devm_register_get_unregister_with_devm_test), + KUNIT_CASE(probed_platform_device_devm_register_unregister_test), + KUNIT_CASE(probed_platform_device_devm_register_get_put_unregister_test), + KUNIT_CASE(probed_platform_device_devm_register_get_unregister_with_devm_test), + {} +}; + +static struct kunit_suite platform_device_devm_test_suite = { + .name = "platform-device-devm", + .test_cases = platform_device_devm_tests, +}; + +kunit_test_suite(platform_device_devm_test_suite);