b39e077fcb28 ("ALSA: usb-audio: remove some dead code")
52c3e317a857 ("ALSA: usb-audio: Unify the release of usb_mixer_elem_info objects")
cb5173594d50 ("ALSA: usb-audio: Fix a memory leak bug")
2f6e24d3151f ("Merge tag 'sound-fix-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound")