ALSA: fireface: 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/fireface/ff-pcm.c

@@ -233,7 +233,6 @@ static int pcm_hw_free(struct snd_pcm_substream *substream)
 		--ff->substreams_counter;
 
 	snd_ff_stream_stop_duplex(ff);
-	snd_ff_stream_release_duplex(ff);
 
 	mutex_unlock(&ff->mutex);
 

sound/firewire/fireface/ff-stream.c

@@ -149,14 +149,6 @@ int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate)
 	return 0;
 }
 
-void snd_ff_stream_release_duplex(struct snd_ff *ff)
-{
-	if (ff->substreams_counter == 0) {
-		fw_iso_resources_free(&ff->tx_resources);
-		fw_iso_resources_free(&ff->rx_resources);
-	}
-}
-
 int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
 {
 	int err;
@@ -217,8 +209,12 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
 
 void snd_ff_stream_stop_duplex(struct snd_ff *ff)
 {
-	if (ff->substreams_counter == 0)
+	if (ff->substreams_counter == 0) {
 		finish_session(ff);
+
+		fw_iso_resources_free(&ff->tx_resources);
+		fw_iso_resources_free(&ff->rx_resources);
+	}
 }
 
 void snd_ff_stream_update_duplex(struct snd_ff *ff)

sound/firewire/fireface/ff.h

@@ -139,7 +139,6 @@ 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);
-void snd_ff_stream_release_duplex(struct snd_ff *ff);
 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);