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commitccbc2a9e78upstream. On error platform_device_register_simple() returns ERR_PTR() value, check for NULL always fails. The change corrects the check itself and propagates the returned error upwards. Fixes:81fb0b9013("staging: android: ion_test: unregister the platform device") Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>