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Wysocki" , Rob Herring , Brian Norris Subject: [PATCH v2 3/3] drivers: base: test: Add ...find_device_by...(... NULL) tests Date: Wed, 11 Dec 2024 16:31:41 -0800 Message-ID: <20241212003201.2098123-4-briannorris@chromium.org> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog In-Reply-To: <20241212003201.2098123-1-briannorris@chromium.org> References: <20241212003201.2098123-1-briannorris@chromium.org> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 We recently updated these device_match*() (and therefore, various *find_device_by*()) functions to return a consistent 'false' value when trying to match a NULL handle. Add tests for this. This provides regression-testing coverage for the sorts of bugs that underly commit 5c8418cf4025 ("PCI/pwrctrl: Unregister platform device only if one actually exists"). Signed-off-by: Brian Norris --- Changes in v2: * Keep "devm" and "match" tests in separate suites drivers/base/test/platform-device-test.c | 42 +++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/base/test/platform-device-test.c b/drivers/base/test/platform-device-test.c index ea05b8785743..c8d4b0a385f2 100644 --- a/drivers/base/test/platform-device-test.c +++ b/drivers/base/test/platform-device-test.c @@ -3,6 +3,8 @@ #include #include +#include +#include #include #define DEVICE_NAME "test" @@ -217,7 +219,45 @@ static struct kunit_suite platform_device_devm_test_suite = { .test_cases = platform_device_devm_tests, }; -kunit_test_suite(platform_device_devm_test_suite); +static void platform_device_find_by_null_test(struct kunit *test) +{ + struct platform_device *pdev; + int ret; + + 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); + + KUNIT_EXPECT_PTR_EQ(test, of_find_device_by_node(NULL), NULL); + + KUNIT_EXPECT_PTR_EQ(test, bus_find_device_by_of_node(&platform_bus_type, NULL), NULL); + KUNIT_EXPECT_PTR_EQ(test, bus_find_device_by_fwnode(&platform_bus_type, NULL), NULL); + KUNIT_EXPECT_PTR_EQ(test, bus_find_device_by_acpi_dev(&platform_bus_type, NULL), NULL); + + KUNIT_EXPECT_FALSE(test, device_match_of_node(&pdev->dev, NULL)); + KUNIT_EXPECT_FALSE(test, device_match_fwnode(&pdev->dev, NULL)); + KUNIT_EXPECT_FALSE(test, device_match_acpi_dev(&pdev->dev, NULL)); + KUNIT_EXPECT_FALSE(test, device_match_acpi_handle(&pdev->dev, NULL)); + + platform_device_unregister(pdev); +} + +static struct kunit_case platform_device_match_tests[] = { + KUNIT_CASE(platform_device_find_by_null_test), + {} +}; + +static struct kunit_suite platform_device_match_test_suite = { + .name = "platform-device-match", + .test_cases = platform_device_match_tests, +}; + +kunit_test_suites( + &platform_device_devm_test_suite, + &platform_device_match_test_suite, +); MODULE_DESCRIPTION("Test module for platform devices"); MODULE_AUTHOR("Maxime Ripard ");