diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c
index 581e138a3115..de7ec7d15f23 100644
--- a/sound/core/seq/seq_midi.c
+++ b/sound/core/seq/seq_midi.c
@@ -265,9 +265,8 @@ static void snd_seq_midisynth_delete(struct seq_midisynth *msynth)
 
 /* register new midi synth port */
 static int
-snd_seq_midisynth_probe(struct device *_dev)
+snd_seq_midisynth_probe(struct snd_seq_device *dev)
 {
-	struct snd_seq_device *dev = to_seq_dev(_dev);
 	struct seq_midisynth_client *client;
 	struct seq_midisynth *msynth, *ms;
 	struct snd_seq_port_info *port __free(kfree) = NULL;
@@ -411,10 +410,9 @@ snd_seq_midisynth_probe(struct device *_dev)
 }
 
 /* release midi synth port */
-static int
-snd_seq_midisynth_remove(struct device *_dev)
+static void
+snd_seq_midisynth_remove(struct snd_seq_device *dev)
 {
-	struct snd_seq_device *dev = to_seq_dev(_dev);
 	struct seq_midisynth_client *client;
 	struct seq_midisynth *msynth;
 	struct snd_card *card = dev->card;
@@ -423,7 +421,7 @@ snd_seq_midisynth_remove(struct device *_dev)
 	guard(mutex)(&register_mutex);
 	client = synths[card->number];
 	if (client == NULL || client->ports[device] == NULL)
-		return -ENODEV;
+		return;
 	ports = client->ports_per_device[device];
 	client->ports_per_device[device] = 0;
 	msynth = client->ports[device];
@@ -437,14 +435,13 @@ snd_seq_midisynth_remove(struct device *_dev)
 		synths[card->number] = NULL;
 		kfree(client);
 	}
-	return 0;
 }
 
 static struct snd_seq_driver seq_midisynth_driver = {
+	.probe = snd_seq_midisynth_probe,
+	.remove = snd_seq_midisynth_remove,
 	.driver = {
 		.name = KBUILD_MODNAME,
-		.probe = snd_seq_midisynth_probe,
-		.remove = snd_seq_midisynth_remove,
 	},
 	.id = SNDRV_SEQ_DEV_ID_MIDISYNTH,
 	.argsize = 0,