snd_pcm_set_sync(substream);
mutex_unlock(&chip->open_mutex);
+ if (snd_BUG_ON(!runtime->hw.channels_min || !runtime->hw.channels_max))
+ return -EINVAL;
+ if (snd_BUG_ON(!runtime->hw.formats))
+ return -EINVAL;
+ if (snd_BUG_ON(!runtime->hw.rates))
+ return -EINVAL;
return 0;
}