1 files changed, 25 insertions, 61 deletions

diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c
index f5da2cd4ce42..405106a6aef9 100644
--- a/sound/firewire/fireworks/fireworks_midi.c
+++ b/sound/firewire/fireworks/fireworks_midi.c
@@ -1,73 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fireworks_midi.c - a part of driver for Fireworks based devices
  *
  * Copyright (c) 2009-2010 Clemens Ladisch
  * Copyright (c) 2013-2014 Takashi Sakamoto
- *
- * Licensed under the terms of the GNU General Public License, version 2.
  */
 #include "fireworks.h"
 
-static int midi_capture_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->capture_substreams++;
-	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_playback_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;
 
 	err = snd_efw_stream_lock_try(efw);
 	if (err < 0)
-		goto end;
+		return err;
 
-	mutex_lock(&efw->mutex);
-	efw->playback_substreams++;
-	err = snd_efw_stream_start_duplex(efw, 0);
-	mutex_unlock(&efw->mutex);
+	scoped_guard(mutex, &efw->mutex) {
+		err = snd_efw_stream_reserve_duplex(efw, 0, 0, 0);
+		if (err >= 0) {
+			++efw->substreams_counter;
+			err = snd_efw_stream_start_duplex(efw);
+			if (err < 0)
+				--efw->substreams_counter;
+		}
+	}
 	if (err < 0)
 		snd_efw_stream_lock_release(efw);
-end:
 	return err;
 }
 
-static int midi_capture_close(struct snd_rawmidi_substream *substream)
+static int midi_close(struct snd_rawmidi_substream *substream)
 {
 	struct snd_efw *efw = substream->rmidi->private_data;
 
-	mutex_lock(&efw->mutex);
-	efw->capture_substreams--;
-	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)
-{
-	struct snd_efw *efw = substream->rmidi->private_data;
-
-	mutex_lock(&efw->mutex);
-	efw->playback_substreams--;
-	snd_efw_stream_stop_duplex(efw);
-	mutex_unlock(&efw->mutex);
+	scoped_guard(mutex, &efw->mutex) {
+		--efw->substreams_counter;
+		snd_efw_stream_stop_duplex(efw);
+	}
 
 	snd_efw_stream_lock_release(efw);
 	return 0;
@@ -76,9 +46,8 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream)
 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
 {
 	struct snd_efw *efw = substrm->rmidi->private_data;
-	unsigned long flags;
 
-	spin_lock_irqsave(&efw->lock, flags);
+	guard(spinlock_irqsave)(&efw->lock);
 
 	if (up)
 		amdtp_am824_midi_trigger(&efw->tx_stream,
@@ -86,16 +55,13 @@ static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
 	else
 		amdtp_am824_midi_trigger(&efw->tx_stream,
 					  substrm->number, NULL);
-
-	spin_unlock_irqrestore(&efw->lock, flags);
 }
 
 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
 {
 	struct snd_efw *efw = substrm->rmidi->private_data;
-	unsigned long flags;
 
-	spin_lock_irqsave(&efw->lock, flags);
+	guard(spinlock_irqsave)(&efw->lock);
 
 	if (up)
 		amdtp_am824_midi_trigger(&efw->rx_stream,
@@ -103,8 +69,6 @@ static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
 	else
 		amdtp_am824_midi_trigger(&efw->rx_stream,
 					 substrm->number, NULL);
-
-	spin_unlock_irqrestore(&efw->lock, flags);
 }
 
 static void set_midi_substream_names(struct snd_efw *efw,
@@ -113,21 +77,21 @@ static void set_midi_substream_names(struct snd_efw *efw,
 	struct snd_rawmidi_substream *subs;
 
 	list_for_each_entry(subs, &str->substreams, list) {
-		snprintf(subs->name, sizeof(subs->name),
-			 "%s MIDI %d", efw->card->shortname, subs->number + 1);
+		scnprintf(subs->name, sizeof(subs->name),
+			  "%s MIDI %d", efw->card->shortname, subs->number + 1);
 	}
 }
 
 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;