4 files changed, 17 insertions, 5 deletions

diff --git a/sound/firewire/fireworks/fireworks.h b/sound/firewire/fireworks/fireworks.h
index fc5f945a49ff..dda797209a27 100644
--- a/sound/firewire/fireworks/fireworks.h
+++ b/sound/firewire/fireworks/fireworks.h
@@ -208,7 +208,8 @@ int snd_efw_command_set_sampling_rate(struct snd_efw *efw, unsigned int rate);
 
 int snd_efw_stream_init_duplex(struct snd_efw *efw);
 int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate,
-				  unsigned int frames_per_period);
+				  unsigned int frames_per_period,
+				  unsigned int frames_per_buffer);
 int snd_efw_stream_start_duplex(struct snd_efw *efw);
 void snd_efw_stream_stop_duplex(struct snd_efw *efw);
 void snd_efw_stream_update_duplex(struct snd_efw *efw);
diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c
index e593f842ee8f..84621e356848 100644
--- a/sound/firewire/fireworks/fireworks_midi.c
+++ b/sound/firewire/fireworks/fireworks_midi.c
@@ -17,7 +17,7 @@ static int midi_open(struct snd_rawmidi_substream *substream)
 		goto end;
 
 	mutex_lock(&efw->mutex);
-	err = snd_efw_stream_reserve_duplex(efw, 0, 0);
+	err = snd_efw_stream_reserve_duplex(efw, 0, 0, 0);
 	if (err >= 0) {
 		++efw->substreams_counter;
 		err = snd_efw_stream_start_duplex(efw);
diff --git a/sound/firewire/fireworks/fireworks_pcm.c b/sound/firewire/fireworks/fireworks_pcm.c
index 314d1f8b8344..abcc53dac8a5 100644
--- a/sound/firewire/fireworks/fireworks_pcm.c
+++ b/sound/firewire/fireworks/fireworks_pcm.c
@@ -197,6 +197,7 @@ static int pcm_open(struct snd_pcm_substream *substream)
 	if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) ||
 	    (efw->substreams_counter > 0 && d->events_per_period > 0)) {
 		unsigned int frames_per_period = d->events_per_period;
+		unsigned int frames_per_buffer = d->events_per_buffer;
 		unsigned int sampling_rate;
 
 		err = snd_efw_command_get_sampling_rate(efw, &sampling_rate);
@@ -215,6 +216,14 @@ static int pcm_open(struct snd_pcm_substream *substream)
 				mutex_unlock(&efw->mutex);
 				goto err_locked;
 			}
+
+			err = snd_pcm_hw_constraint_minmax(substream->runtime,
+					SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+					frames_per_buffer, frames_per_buffer);
+			if (err < 0) {
+				mutex_unlock(&efw->mutex);
+				goto err_locked;
+			}
 		}
 	}
 
@@ -249,10 +258,11 @@ static int pcm_hw_params(struct snd_pcm_substream *substream,
 	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 		unsigned int rate = params_rate(hw_params);
 		unsigned int frames_per_period = params_period_size(hw_params);
+		unsigned int frames_per_buffer = params_buffer_size(hw_params);
 
 		mutex_lock(&efw->mutex);
 		err = snd_efw_stream_reserve_duplex(efw, rate,
-						    frames_per_period);
+					frames_per_period, frames_per_buffer);
 		if (err >= 0)
 			++efw->substreams_counter;
 		mutex_unlock(&efw->mutex);
diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c
index e4d4dd08c60a..f35a33d4d4e6 100644
--- a/sound/firewire/fireworks/fireworks_stream.c
+++ b/sound/firewire/fireworks/fireworks_stream.c
@@ -182,7 +182,8 @@ static int keep_resources(struct snd_efw *efw, struct amdtp_stream *stream,
 }
 
 int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate,
-				  unsigned int frames_per_period)
+				  unsigned int frames_per_period,
+				  unsigned int frames_per_buffer)
 {
 	unsigned int curr_rate;
 	int err;
@@ -231,7 +232,7 @@ int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate,
 		}
 
 		err = amdtp_domain_set_events_per_period(&efw->domain,
-							 frames_per_period, 0);
+					frames_per_period, frames_per_buffer);
 		if (err < 0) {
 			cmp_connection_release(&efw->in_conn);
 			cmp_connection_release(&efw->out_conn);