ALSA: seq: oss: Use automatic cleanup of kfree()

There are common patterns where a temporary buffer is allocated and
freed at the exit, and those can be simplified with the recent cleanup
mechanism via __free(kfree).

No functional changes, only code refactoring.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20240222111509.28390-7-tiwai@suse.de

2 files changed, 8 insertions, 18 deletions

diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c
index 76bf41c26acda..676246fa02f15 100644
--- a/sound/core/seq/oss/seq_oss_init.c
+++ b/sound/core/seq/oss/seq_oss_init.c
@@ -63,20 +63,18 @@ int __init
 snd_seq_oss_create_client(void)
 {
 	int rc;
-	struct snd_seq_port_info *port;
+	struct snd_seq_port_info *port __free(kfree) = NULL;
 	struct snd_seq_port_callback port_callback;
 
 	port = kzalloc(sizeof(*port), GFP_KERNEL);
-	if (!port) {
-		rc = -ENOMEM;
-		goto __error;
-	}
+	if (!port)
+		return -ENOMEM;
 
 	/* create ALSA client */
 	rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS,
 					  "OSS sequencer");
 	if (rc < 0)
-		goto __error;
+		return rc;
 
 	system_client = rc;
 
@@ -104,14 +102,11 @@ snd_seq_oss_create_client(void)
 		subs.dest.port = system_port;
 		call_ctl(SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs);
 	}
-	rc = 0;
 
 	/* look up midi devices */
 	schedule_work(&async_lookup_work);
 
- __error:
-	kfree(port);
-	return rc;
+	return 0;
 }
 
 
diff --git a/sound/core/seq/oss/seq_oss_midi.c b/sound/core/seq/oss/seq_oss_midi.c
index f2940b29595f0..f8e247d9e5c99 100644
--- a/sound/core/seq/oss/seq_oss_midi.c
+++ b/sound/core/seq/oss/seq_oss_midi.c
@@ -64,16 +64,13 @@ static int send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,
 int
 snd_seq_oss_midi_lookup_ports(int client)
 {
-	struct snd_seq_client_info *clinfo;
-	struct snd_seq_port_info *pinfo;
+	struct snd_seq_client_info *clinfo __free(kfree) = NULL;
+	struct snd_seq_port_info *pinfo __free(kfree) = NULL;
 
 	clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL);
 	pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
-	if (! clinfo || ! pinfo) {
-		kfree(clinfo);
-		kfree(pinfo);
+	if (!clinfo || !pinfo)
 		return -ENOMEM;
-	}
 	clinfo->client = -1;
 	while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) {
 		if (clinfo->client == client)
@@ -83,8 +80,6 @@ snd_seq_oss_midi_lookup_ports(int client)
 		while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0)
 			snd_seq_oss_midi_check_new_port(pinfo);
 	}
-	kfree(clinfo);
-	kfree(pinfo);
 	return 0;
 }