diff options
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_lib.c | 3 | ||||
| -rw-r--r-- | sound/core/pcm_native.c | 7 |
2 files changed, 10 insertions, 0 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 3388442..cd69b38 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1961,6 +1961,9 @@ static int pcm_sanity_check(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime; if (PCM_RUNTIME_CHECK(substream)) return -ENXIO; + /* TODO: consider and -EINVAL here */ + if (substream->hw_no_buffer) + snd_printd("%s: warning this PCM is host less\n", __func__); runtime = substream->runtime; if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) return -EINVAL; diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 1c6be91..0e97248 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; @@ -2035,6 +2036,12 @@ 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; |