[alsa-devel] [PATCH 6/6] 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 320c948..127b06f 100644
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -884,6 +884,9 @@ 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 f4fa32b..5b897f5 100644
--- a/src/pcm/pcm_dshare.c
+++ b/src/pcm/pcm_dshare.c
@@ -570,6 +570,9 @@ 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 0729a5a..61579e8 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);
 }
 
-- 
1.7.9.5