diff options
Diffstat (limited to 'sound/core/pcm_native.c')
| -rw-r--r-- | sound/core/pcm_native.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 6848dd9c70a..c5a97a8958d 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -842,6 +842,7 @@ static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) return -EBADFD; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && + !substream->hw_no_buffer && !snd_pcm_playback_data(substream)) return -EPIPE; runtime->trigger_master = substream; @@ -2028,6 +2029,12 @@ int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, goto error; } + if (substream->ops == NULL) { + snd_printd("cannot open back end PCMs directly\n"); + err = -ENODEV; + goto error; + } + if ((err = substream->ops->open(substream)) < 0) goto error; |