> The code path is after snd_device_new() which has its own destructor callback. Thanks for your reminder. Can the properties of this programming interface be documented also together with the function declaration for the safer handling of ALSA components? https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/sound/kernel-api/writing-an-alsa-driver.rst?id=d6d5df1db6e9d7f8f76d2911707f7d5877251b02#n567 Can any more API information help to improve automatic source code analysis around similar functions? Regards, Markus