1 files changed, 23 insertions, 26 deletions

diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c
index 1b9260108e482..b4672613c2613 100644
--- a/sound/core/seq/seq_virmidi.c
+++ b/sound/core/seq/seq_virmidi.c
@@ -62,6 +62,13 @@ static void snd_virmidi_init_event(struct snd_virmidi *vmidi,
 /*
  * decode input event and put to read buffer of each opened file
  */
+
+/* callback for snd_seq_dump_var_event(), bridging to snd_rawmidi_receive() */
+static int dump_to_rawmidi(void *ptr, void *buf, int count)
+{
+	return snd_rawmidi_receive(ptr, buf, count);
+}
+
 static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev,
 					 struct snd_seq_event *ev,
 					 bool atomic)
@@ -80,7 +87,7 @@ static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev,
 		if (ev->type == SNDRV_SEQ_EVENT_SYSEX) {
 			if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
 				continue;
-			snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)snd_rawmidi_receive, vmidi->substream);
+			snd_seq_dump_var_event(ev, dump_to_rawmidi, vmidi->substream);
 			snd_midi_event_reset_decode(vmidi->parser);
 		} else {
 			len = snd_midi_event_decode(vmidi->parser, msg, sizeof(msg), ev);
@@ -192,11 +199,10 @@ static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream)
 	vmidi->client = rdev->client;
 	vmidi->port = rdev->port;	
 	runtime->private_data = vmidi;
-	down_write(&rdev->filelist_sem);
-	write_lock_irq(&rdev->filelist_lock);
-	list_add_tail(&vmidi->list, &rdev->filelist);
-	write_unlock_irq(&rdev->filelist_lock);
-	up_write(&rdev->filelist_sem);
+	scoped_guard(rwsem_write, &rdev->filelist_sem) {
+		guard(write_lock_irq)(&rdev->filelist_lock);
+		list_add_tail(&vmidi->list, &rdev->filelist);
+	}
 	vmidi->rdev = rdev;
 	return 0;
 }
@@ -236,11 +242,10 @@ static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream)
 	struct snd_virmidi_dev *rdev = substream->rmidi->private_data;
 	struct snd_virmidi *vmidi = substream->runtime->private_data;
 
-	down_write(&rdev->filelist_sem);
-	write_lock_irq(&rdev->filelist_lock);
-	list_del(&vmidi->list);
-	write_unlock_irq(&rdev->filelist_lock);
-	up_write(&rdev->filelist_sem);
+	scoped_guard(rwsem_write, &rdev->filelist_sem) {
+		guard(write_lock_irq)(&rdev->filelist_lock);
+		list_del(&vmidi->list);
+	}
 	snd_midi_event_free(vmidi->parser);
 	substream->runtime->private_data = NULL;
 	kfree(vmidi);
@@ -356,26 +361,22 @@ static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev)
 {
 	int client;
 	struct snd_seq_port_callback pcallbacks;
-	struct snd_seq_port_info *pinfo;
+	struct snd_seq_port_info *pinfo __free(kfree) = NULL;
 	int err;
 
 	if (rdev->client >= 0)
 		return 0;
 
 	pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
-	if (!pinfo) {
-		err = -ENOMEM;
-		goto __error;
-	}
+	if (!pinfo)
+		return -ENOMEM;
 
 	client = snd_seq_create_kernel_client(rdev->card, rdev->device,
 					      "%s %d-%d", rdev->rmidi->name,
 					      rdev->card->number,
 					      rdev->device);
-	if (client < 0) {
-		err = client;
-		goto __error;
-	}
+	if (client < 0)
+		return client;
 	rdev->client = client;
 
 	/* create a port */
@@ -403,15 +404,11 @@ static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev)
 	if (err < 0) {
 		snd_seq_delete_kernel_client(client);
 		rdev->client = -1;
-		goto __error;
+		return err;
 	}
 
 	rdev->port = pinfo->addr.port;
-	err = 0; /* success */
-
- __error:
-	kfree(pinfo);
-	return err;
+	return 0; /* success */
 }