ALSA: core: Clean up OSS proc file management

A few minor cleanups:
- Move the call of snd_info_minor_register() into snd_info_init() so
  that we can call all proc-related stuff in a shot
- Add missing __init prefix to snd_info_minor_register()
- Return an error properly from snd_oss_info_register()
- Drop snd_info_minor_unregister() that is superfluous now

Acked-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/info.h

@@ -94,10 +94,8 @@ struct snd_info_entry {
 
 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
 int snd_info_minor_register(void);
-int snd_info_minor_unregister(void);
 #else
-#define snd_info_minor_register() /* NOP */
-#define snd_info_minor_unregister() /* NOP */
+#define snd_info_minor_register()	0
 #endif
 
 

sound/core/info.c

@@ -479,7 +479,8 @@ int __init snd_info_init(void)
 	if (snd_info_version_init() < 0 ||
 	    snd_minor_info_init() < 0 ||
 	    snd_minor_info_oss_init() < 0 ||
-	    snd_card_info_init() < 0)
+	    snd_card_info_init() < 0 ||
+	    snd_info_minor_register() < 0)
 		goto error;
 	return 0;
 

sound/core/info_oss.c

@@ -35,7 +35,6 @@
 
 static DEFINE_MUTEX(strings);
 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
-static struct snd_info_entry *snd_sndstat_proc_entry;
 
 int snd_oss_info_register(int dev, int num, char *string)
 {
@@ -110,25 +109,15 @@ static void snd_sndstat_proc_read(struct snd_info_entry *entry,
 	snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
 }
 
-int snd_info_minor_register(void)
+int __init snd_info_minor_register(void)
 {
 	struct snd_info_entry *entry;
 
 	memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
-	if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) {
-		entry->c.text.read = snd_sndstat_proc_read;
-		if (snd_info_register(entry) < 0) {
-			snd_info_free_entry(entry);
-			entry = NULL;
-		}
-	}
-	snd_sndstat_proc_entry = entry;
-	return 0;
-}
-
-int snd_info_minor_unregister(void)
-{
-	snd_info_free_entry(snd_sndstat_proc_entry);
-	snd_sndstat_proc_entry = NULL;
-	return 0;
+	entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
+					     snd_oss_root);
+	if (!entry)
+		return -ENOMEM;
+	entry->c.text.read = snd_sndstat_proc_read;
+	return snd_info_register(entry); /* freed in error path */
 }

sound/core/sound.c

@@ -409,7 +409,6 @@ static int __init alsa_sound_init(void)
 		unregister_chrdev(major, "alsa");
 		return -ENOMEM;
 	}
-	snd_info_minor_register();
 #ifndef MODULE
 	pr_info("Advanced Linux Sound Architecture Driver Initialized.\n");
 #endif
@@ -418,7 +417,6 @@ static int __init alsa_sound_init(void)
 
 static void __exit alsa_sound_exit(void)
 {
-	snd_info_minor_unregister();
 	snd_info_done();
 	unregister_chrdev(major, "alsa");
 }