Merge branch 'topic/pcm-drain-nonblock' into for-linus

* topic/pcm-drain-nonblock:
  ALSA: pcm - Increase protocol version
  ALSA: pcm - Fix drain behavior in non-blocking mode

1 files changed, 8 insertions, 4 deletions

diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 9db60d831bb2..30f410832a25 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -197,12 +197,16 @@ static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream,
                 avail = snd_pcm_capture_avail(runtime);
         if (avail > runtime->avail_max)
                 runtime->avail_max = avail;
-        if (avail >= runtime->stop_threshold) {
-                if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING)
+        if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
+                if (avail >= runtime->buffer_size) {
                         snd_pcm_drain_done(substream);
-                else
+                        return -EPIPE;
+                }
+        } else {
+                if (avail >= runtime->stop_threshold) {
                         xrun(substream);
-                return -EPIPE;
+                        return -EPIPE;
+                }
         }
         if (avail >= runtime->control->avail_min)
                 wake_up(&runtime->sleep);