> +/* Stream disable request timeout during USB device disconnect */ > +#define DEV_RELEASE_WAIT_TIMEOUT 10000 /* in ms */ 10s really? That seems rather large for a stream disable timeout... > +static struct snd_usb_platform_ops offload_ops = { > + .connect_cb = qc_usb_audio_offload_probe, > + .disconnect_cb = qc_usb_audio_offload_disconnect, > + .suspend_cb = qc_usb_audio_offload_suspend, > +}; You probably want to explain why there's no .resume_cb? The comments mention also that the suspend_cb has to stop playback, but then who resumes playback :-)