1 files changed, 16 insertions, 0 deletions
diff --git a/sound/firewire/fireface/ff-pcm.c b/sound/firewire/fireface/ff-pcm.c
index 93cee1978e8e..adb5c87f492f 100644
--- a/sound/firewire/fireface/ff-pcm.c
+++ b/sound/firewire/fireface/ff-pcm.c
@@ -365,6 +365,20 @@ static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 	return amdtp_stream_pcm_pointer(&ff->rx_stream);
 }
 
+static int pcm_capture_ack(struct snd_pcm_substream *substream)
+{
+	struct snd_ff *ff = substream->private_data;
+
+	return amdtp_stream_pcm_ack(&ff->tx_stream);
+}
+
+static int pcm_playback_ack(struct snd_pcm_substream *substream)
+{
+	struct snd_ff *ff = substream->private_data;
+
+	return amdtp_stream_pcm_ack(&ff->rx_stream);
+}
+
 static struct snd_pcm_ops pcm_capture_ops = {
 	.open		= pcm_open,
 	.close		= pcm_close,
@@ -374,6 +388,7 @@ static struct snd_pcm_ops pcm_capture_ops = {
 	.prepare	= pcm_capture_prepare,
 	.trigger	= pcm_capture_trigger,
 	.pointer	= pcm_capture_pointer,
+	.ack		= pcm_capture_ack,
 	.page		= snd_pcm_lib_get_vmalloc_page,
 };
 
@@ -386,6 +401,7 @@ static struct snd_pcm_ops pcm_playback_ops = {
 	.prepare	= pcm_playback_prepare,
 	.trigger	= pcm_playback_trigger,
 	.pointer	= pcm_playback_pointer,
+	.ack		= pcm_playback_ack,
 	.page		= snd_pcm_lib_get_vmalloc_page,
 	.mmap		= snd_pcm_lib_mmap_vmalloc,
 };