{
        struct channel *const channel = data;
 
-       pr_info("playback thread started\n");
-
        while (!kthread_should_stop()) {
                struct mbo *mbo = NULL;
                bool period_elapsed = false;
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct most_channel_config *cfg = channel->cfg;
 
-       pr_info("pcm_open(), %s\n", substream->name);
-
        channel->substream = substream;
 
        if (cfg->direction == MOST_CH_TX) {
 {
        struct channel *channel = substream->private_data;
 
-       pr_info("pcm_close(), %s\n", substream->name);
-
        if (channel->cfg->direction == MOST_CH_TX)
                kthread_stop(channel->playback_task);
        most_stop_channel(channel->iface, channel->id, &audio_aim);
        int ret;
        struct channel *channel = substream->private_data;
 
-       pr_info("pcm_hw_params()\n");
-
        if ((params_channels(hw_params) > channel->pcm_hardware.channels_max) ||
            (params_channels(hw_params) < channel->pcm_hardware.channels_min) ||
            !(params_format(hw_params) != channel->pcm_hardware.formats))
  */
 static int pcm_hw_free(struct snd_pcm_substream *substream)
 {
-       pr_info("pcm_hw_free()\n");
-
        return snd_pcm_lib_free_vmalloc_buffer(substream);
 }
 
        char *card_name;
        char *pcm_format;
 
-       pr_info("sound_probe_channel()\n");
-
        if (!iface)
                return -EINVAL;
 
 {
        struct channel *channel;
 
-       pr_info("sound_disconnect_channel()\n");
-
        channel = get_channel(iface, channel_id);
        if (!channel) {
                pr_err("sound_disconnect_channel(), invalid channel %d\n",