ALSA: firewire-digi00x: unify stop and release method for duplex streams

>From callbacks for pcm and rawmidi interfaces, the functions to stop
and release duplex streams are called at the same time. This commit
merges the two functions.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/digi00x/digi00x-midi.c

@@ -37,7 +37,6 @@ static int midi_close(struct snd_rawmidi_substream *substream)
 	mutex_lock(&dg00x->mutex);
 	--dg00x->substreams_counter;
 	snd_dg00x_stream_stop_duplex(dg00x);
-	snd_dg00x_stream_release_duplex(dg00x);
 	mutex_unlock(&dg00x->mutex);
 
 	snd_dg00x_stream_lock_release(dg00x);

sound/firewire/digi00x/digi00x-pcm.c

@@ -189,7 +189,6 @@ static int pcm_hw_free(struct snd_pcm_substream *substream)
 		--dg00x->substreams_counter;
 
 	snd_dg00x_stream_stop_duplex(dg00x);
-	snd_dg00x_stream_release_duplex(dg00x);
 
 	mutex_unlock(&dg00x->mutex);
 

sound/firewire/digi00x/digi00x-stream.c

@@ -293,14 +293,6 @@ int snd_dg00x_stream_reserve_duplex(struct snd_dg00x *dg00x, unsigned int rate)
 	return 0;
 }
 
-void snd_dg00x_stream_release_duplex(struct snd_dg00x *dg00x)
-{
-	if (dg00x->substreams_counter == 0) {
-		fw_iso_resources_free(&dg00x->tx_resources);
-		fw_iso_resources_free(&dg00x->rx_resources);
-	}
-}
-
 int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x)
 {
 	unsigned int generation = dg00x->rx_resources.generation;
@@ -372,8 +364,12 @@ int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x)
 
 void snd_dg00x_stream_stop_duplex(struct snd_dg00x *dg00x)
 {
-	if (dg00x->substreams_counter == 0)
+	if (dg00x->substreams_counter == 0) {
 		finish_session(dg00x);
+
+		fw_iso_resources_free(&dg00x->tx_resources);
+		fw_iso_resources_free(&dg00x->rx_resources);
+	}
 }
 
 void snd_dg00x_stream_update_duplex(struct snd_dg00x *dg00x)

sound/firewire/digi00x/digi00x.h

@@ -143,7 +143,6 @@ int snd_dg00x_stream_init_duplex(struct snd_dg00x *dg00x);
 int snd_dg00x_stream_reserve_duplex(struct snd_dg00x *dg00x, unsigned int rate);
 int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x);
 void snd_dg00x_stream_stop_duplex(struct snd_dg00x *dg00x);
-void snd_dg00x_stream_release_duplex(struct snd_dg00x *dg00x);
 void snd_dg00x_stream_update_duplex(struct snd_dg00x *dg00x);
 void snd_dg00x_stream_destroy_duplex(struct snd_dg00x *dg00x);