snd_trident_ioctl() does nothing but calling the default handler. Now PCM core accepts NULL as the default ioctl ops(*), so let's drop altogether. (*) commit fc033cbf6fb7 ("ALSA: pcm: Allow NULL ioctl ops") Link: https://lore.kernel.org/r/20191210061145.24641-15-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>