ALSA: fireworks: code refactoring for rawmidi.open/close

Two sets of callbacks for rawmidi.open/close but they have the same
codes. This commit unifies each of the callbacks.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/fireworks/fireworks_midi.c

@@ -8,7 +8,7 @@
  */
 #include "fireworks.h"
 
-static int midi_capture_open(struct snd_rawmidi_substream *substream)
+static int midi_open(struct snd_rawmidi_substream *substream)
 {
 	struct snd_efw *efw = substream->rmidi->private_data;
 	int err;
@@ -23,44 +23,11 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream)
 	mutex_unlock(&efw->mutex);
 	if (err < 0)
 		snd_efw_stream_lock_release(efw);
-
 end:
 	return err;
 }
 
-static int midi_playback_open(struct snd_rawmidi_substream *substream)
-{
-	struct snd_efw *efw = substream->rmidi->private_data;
-	int err;
-
-	err = snd_efw_stream_lock_try(efw);
-	if (err < 0)
-		goto end;
-
-	mutex_lock(&efw->mutex);
-	++efw->substreams_counter;
-	err = snd_efw_stream_start_duplex(efw, 0);
-	mutex_unlock(&efw->mutex);
-	if (err < 0)
-		snd_efw_stream_lock_release(efw);
-end:
-	return err;
-}
-
-static int midi_capture_close(struct snd_rawmidi_substream *substream)
-{
-	struct snd_efw *efw = substream->rmidi->private_data;
-
-	mutex_lock(&efw->mutex);
-	--efw->substreams_counter;
-	snd_efw_stream_stop_duplex(efw);
-	mutex_unlock(&efw->mutex);
-
-	snd_efw_stream_lock_release(efw);
-	return 0;
-}
-
-static int midi_playback_close(struct snd_rawmidi_substream *substream)
+static int midi_close(struct snd_rawmidi_substream *substream)
 {
 	struct snd_efw *efw = substream->rmidi->private_data;
 
@@ -121,13 +88,13 @@ static void set_midi_substream_names(struct snd_efw *efw,
 int snd_efw_create_midi_devices(struct snd_efw *efw)
 {
 	static const struct snd_rawmidi_ops capture_ops = {
-		.open		= midi_capture_open,
-		.close		= midi_capture_close,
+		.open		= midi_open,
+		.close		= midi_close,
 		.trigger	= midi_capture_trigger,
 	};
 	static const struct snd_rawmidi_ops playback_ops = {
-		.open		= midi_playback_open,
-		.close		= midi_playback_close,
+		.open		= midi_open,
+		.close		= midi_close,
 		.trigger	= midi_playback_trigger,
 	};
 	struct snd_rawmidi *rmidi;