113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright 2023 Maxime Ripard <mripard@kernel.org>
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#include <kunit/resource.h>
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#include <linux/device.h>
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#define DEVICE_NAME "test"
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struct test_priv {
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bool probe_done;
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bool release_done;
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wait_queue_head_t release_wq;
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struct device *dev;
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};
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static int root_device_devm_init(struct kunit *test)
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{
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struct test_priv *priv;
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priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
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init_waitqueue_head(&priv->release_wq);
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test->priv = priv;
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return 0;
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}
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static void devm_device_action(void *ptr)
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{
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struct test_priv *priv = ptr;
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priv->release_done = true;
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wake_up_interruptible(&priv->release_wq);
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}
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#define RELEASE_TIMEOUT_MS 100
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/*
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* Tests that a bus-less, non-probed device will run its device-managed
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* actions when unregistered.
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*/
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static void root_device_devm_register_unregister_test(struct kunit *test)
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{
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struct test_priv *priv = test->priv;
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int ret;
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priv->dev = root_device_register(DEVICE_NAME);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);
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ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv);
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KUNIT_ASSERT_EQ(test, ret, 0);
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root_device_unregister(priv->dev);
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ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done,
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msecs_to_jiffies(RELEASE_TIMEOUT_MS));
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KUNIT_EXPECT_GT(test, ret, 0);
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}
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static void devm_put_device_action(void *ptr)
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{
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struct test_priv *priv = ptr;
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put_device(priv->dev);
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priv->release_done = true;
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wake_up_interruptible(&priv->release_wq);
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}
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/*
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* Tests that a bus-less, non-probed device will run its device-managed
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* actions when unregistered, even if someone still holds a reference to
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* it.
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*/
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static void root_device_devm_register_get_unregister_with_devm_test(struct kunit *test)
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{
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struct test_priv *priv = test->priv;
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int ret;
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priv->dev = root_device_register(DEVICE_NAME);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);
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get_device(priv->dev);
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ret = devm_add_action_or_reset(priv->dev, devm_put_device_action, priv);
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KUNIT_ASSERT_EQ(test, ret, 0);
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root_device_unregister(priv->dev);
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ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done,
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msecs_to_jiffies(RELEASE_TIMEOUT_MS));
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KUNIT_EXPECT_GT(test, ret, 0);
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}
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static struct kunit_case root_device_devm_tests[] = {
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KUNIT_CASE(root_device_devm_register_unregister_test),
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KUNIT_CASE(root_device_devm_register_get_unregister_with_devm_test),
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{}
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};
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static struct kunit_suite root_device_devm_test_suite = {
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.name = "root-device-devm",
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.init = root_device_devm_init,
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.test_cases = root_device_devm_tests,
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};
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kunit_test_suite(root_device_devm_test_suite);
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MODULE_DESCRIPTION("Test module for root devices");
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MODULE_AUTHOR("Maxime Ripard <mripard@kernel.org>");
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MODULE_LICENSE("GPL");
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