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This may happen when a module creating the device is removed or on failure in platform_device_add(). When we try to reuse that software node in a subsequent call to platform_device_register_full(), it will fails with -EBUSY. Add the missing call to device_remove_software_node() in release path. Fixes: 0fc434bc2c45 ("driver core: platform: allow attaching software nodes= when creating devices") Signed-off-by: Bartosz Golaszewski --- drivers/base/platform.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 75b4698d0e582e67adafa78c312d75c72fd654cf..a442abb4f1028a91f3c56b51211= 335678f7f18a2 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -600,6 +600,7 @@ static void platform_device_release(struct device *dev) pdev.dev); =20 of_node_put(pa->pdev.dev.of_node); + device_remove_software_node(dev); kfree(pa->pdev.dev.platform_data); kfree(pa->pdev.mfd_cell); kfree(pa->pdev.resource); --=20 2.47.3 From nobody Mon Jun 15 13:56:24 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 846B63B4E8A for ; Fri, 10 Apr 2026 11:51:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Signed-off-by: Bartosz Golaszewski --- drivers/base/test/platform-device-test.c | 62 ++++++++++++++++++++++++++++= ++++ 1 file changed, 62 insertions(+) diff --git a/drivers/base/test/platform-device-test.c b/drivers/base/test/p= latform-device-test.c index 6355a2231b741791b54eb78af42e13f31f745184..9046be1cd0f68b57f70eddb1522= 7609c925318ce 100644 --- a/drivers/base/test/platform-device-test.c +++ b/drivers/base/test/platform-device-test.c @@ -5,8 +5,10 @@ =20 #include #include +#include #include #include +#include =20 #define DEVICE_NAME "test" =20 @@ -253,9 +255,69 @@ static struct kunit_suite platform_device_match_test_s= uite =3D { .test_cases =3D platform_device_match_tests, }; =20 +static int platform_device_swnode_test_probe(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver platform_swnode_test_driver =3D { + .probe =3D platform_device_swnode_test_probe, + .driver =3D { + .name =3D DEVICE_NAME, + }, +}; + +static const struct software_node platform_device_test_swnode =3D { }; + +static void platform_device_swnode_add_twice(struct kunit *test) +{ + struct platform_device_info pdevinfo; + struct platform_device *pdev; + struct fwnode_handle fwnode; + int ret; + + ret =3D kunit_platform_driver_register(test, &platform_swnode_test_driver= ); + KUNIT_ASSERT_EQ(test, ret, 0); + + fwnode_init(&fwnode, NULL); + pdevinfo =3D (struct platform_device_info){ + .name =3D DEVICE_NAME, + .id =3D PLATFORM_DEVID_NONE, + .fwnode =3D &fwnode, + .swnode =3D &platform_device_test_swnode, + }; + + pdev =3D platform_device_register_full(&pdevinfo); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + wait_for_device_probe(); + KUNIT_ASSERT_TRUE(test, device_is_bound(&pdev->dev)); + + platform_device_unregister(pdev); + + pdev =3D platform_device_register_full(&pdevinfo); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + wait_for_device_probe(); + KUNIT_ASSERT_TRUE(test, device_is_bound(&pdev->dev)); + + platform_device_unregister(pdev); +} + +static struct kunit_case platform_device_swnode_tests[] =3D { + KUNIT_CASE(platform_device_swnode_add_twice), + {} +}; + +static struct kunit_suite platform_device_swnode_test_suite =3D { + .name =3D "platform-device-swnode", + .test_cases =3D platform_device_swnode_tests, +}; + kunit_test_suites( &platform_device_devm_test_suite, &platform_device_match_test_suite, + &platform_device_swnode_test_suite, ); =20 MODULE_DESCRIPTION("Test module for platform devices"); --=20 2.47.3