[alsa-devel] [PATCH 6/6 v2] alsa-lib:pcm: don't return bogus buffer levels in xrun state

[sutar.mounesh at gmail.com]

From: Andreas Pape <apape at de.adit-jv.com>

Signed-off-by: Andreas Pape <apape at de.adit-jv.com>

diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c
index dc1b032..3e1dc0a 100644
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -882,6 +882,9 @@ static snd_pcm_sframes_t snd_pcm_dmix_avail_update(snd_pcm_t *pcm)
 		if (( err = snd_pcm_dmix_sync_ptr(pcm)) < 0)
 			return err;
 	}
+	if (dmix->state == SND_PCM_STATE_XRUN)
+		return -EPIPE;
+
 	return snd_pcm_mmap_playback_avail(pcm);
 }
 
diff --git a/src/pcm/pcm_dshare.c b/src/pcm/pcm_dshare.c
index 90ac6ed..8bdb4bc 100644
--- a/src/pcm/pcm_dshare.c
+++ b/src/pcm/pcm_dshare.c
@@ -569,6 +569,9 @@ static snd_pcm_sframes_t snd_pcm_dshare_avail_update(snd_pcm_t *pcm)
 		if ((err = snd_pcm_dshare_sync_ptr(pcm)) < 0)
 			return err;
 	}
+	if (dshare->state == SND_PCM_STATE_XRUN)
+		return -EPIPE;
+
 	return snd_pcm_mmap_playback_avail(pcm);
 }
 
diff --git a/src/pcm/pcm_dsnoop.c b/src/pcm/pcm_dsnoop.c
index 2b0df89..60a5843 100644
--- a/src/pcm/pcm_dsnoop.c
+++ b/src/pcm/pcm_dsnoop.c
@@ -454,6 +454,9 @@ static snd_pcm_sframes_t snd_pcm_dsnoop_avail_update(snd_pcm_t *pcm)
 		if (err < 0)
 			return err;
 	}
+	if (dsnoop->state == SND_PCM_STATE_XRUN)
+		return -EPIPE;
+
 	return snd_pcm_mmap_capture_avail(pcm);
 }
 
-- 
2.7.4