snd_pcm_lib_ioctl (9)

int snd_pcm_lib_ioctl(struct snd_pcm_substream * substream, unsigned int cmd, void * arg);

substream

the pcm substream instance

cmd

ioctl command

arg

ioctl argument

Processes the generic ioctl commands for PCM. Can be passed as the ioctl callback for PCM ops.

Zero if successful, or a negative error code on failure.