3 files changed, 17 insertions, 4 deletions

diff --git a/sound/firewire/fireface/ff-pcm.c b/sound/firewire/fireface/ff-pcm.c
index 415bc9ccd1c7..005d959f8651 100644
--- a/sound/firewire/fireface/ff-pcm.c
+++ b/sound/firewire/fireface/ff-pcm.c
@@ -180,6 +180,7 @@ static int pcm_open(struct snd_pcm_substream *substream)
 	} else {
 		if (ff->substreams_counter > 0) {
 			unsigned int frames_per_period = d->events_per_period;
+			unsigned int frames_per_buffer = d->events_per_buffer;
 
 			rate = amdtp_rate_table[ff->rx_stream.sfc];
 			substream->runtime->hw.rate_min = rate;
@@ -192,6 +193,14 @@ static int pcm_open(struct snd_pcm_substream *substream)
 				mutex_unlock(&ff->mutex);
 				goto release_lock;
 			}
+
+			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(&ff->mutex);
+				goto release_lock;
+			}
 		}
 	}
 
@@ -229,9 +238,11 @@ 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(&ff->mutex);
-		err = snd_ff_stream_reserve_duplex(ff, rate, frames_per_period);
+		err = snd_ff_stream_reserve_duplex(ff, rate, frames_per_period,
+						   frames_per_buffer);
 		if (err >= 0)
 			++ff->substreams_counter;
 		mutex_unlock(&ff->mutex);
diff --git a/sound/firewire/fireface/ff-stream.c b/sound/firewire/fireface/ff-stream.c
index cbe0e5087b05..a13754f914e8 100644
--- a/sound/firewire/fireface/ff-stream.c
+++ b/sound/firewire/fireface/ff-stream.c
@@ -107,7 +107,8 @@ void snd_ff_stream_destroy_duplex(struct snd_ff *ff)
 }
 
 int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate,
-				 unsigned int frames_per_period)
+				 unsigned int frames_per_period,
+				 unsigned int frames_per_buffer)
 {
 	unsigned int curr_rate;
 	enum snd_ff_clock_src src;
@@ -153,7 +154,7 @@ int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate,
 			return err;
 
 		err = amdtp_domain_set_events_per_period(&ff->domain,
-							 frames_per_period, 0);
+					frames_per_period, frames_per_buffer);
 		if (err < 0) {
 			fw_iso_resources_free(&ff->tx_resources);
 			fw_iso_resources_free(&ff->rx_resources);
diff --git a/sound/firewire/fireface/ff.h b/sound/firewire/fireface/ff.h
index 970d4ae571ee..dc7a20f75983 100644
--- a/sound/firewire/fireface/ff.h
+++ b/sound/firewire/fireface/ff.h
@@ -140,7 +140,8 @@ int snd_ff_stream_get_multiplier_mode(enum cip_sfc sfc,
 int snd_ff_stream_init_duplex(struct snd_ff *ff);
 void snd_ff_stream_destroy_duplex(struct snd_ff *ff);
 int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate,
-				 unsigned int frames_per_period);
+				 unsigned int frames_per_period,
+				 unsigned int frames_per_buffer);
 int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate);
 void snd_ff_stream_stop_duplex(struct snd_ff *ff);
 void snd_ff_stream_update_duplex(struct snd_ff *ff);