[Bluetooth] Add support for Canyon CN-BTU1 dongle

[pandora-kernel.git] / sound / core / info.c

diff --git a/sound/core/info.c b/sound/core/info.c
index 340332c..e43662b 100644 (file)
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -78,6 +78,7 @@ struct snd_info_private_data {
 
 static int snd_info_version_init(void);
 static int snd_info_version_done(void);
+static void snd_info_disconnect(struct snd_info_entry *entry);
 
 
 /* resize the proc r/w buffer */
@@ -174,15 +175,15 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig)
        switch (entry->content) {
        case SNDRV_INFO_CONTENT_TEXT:
                switch (orig) {
-               case 0: /* SEEK_SET */
+               case SEEK_SET:
                        file->f_pos = offset;
                        ret = file->f_pos;
                        goto out;
-               case 1: /* SEEK_CUR */
+               case SEEK_CUR:
                        file->f_pos += offset;
                        ret = file->f_pos;
                        goto out;
-               case 2: /* SEEK_END */
+               case SEEK_END:
                default:
                        ret = -EINVAL;
                        goto out;
@@ -304,7 +305,7 @@ static int snd_info_entry_open(struct inode *inode, struct file *file)
        mutex_lock(&info_mutex);
        p = PDE(inode);
        entry = p == NULL ? NULL : (struct snd_info_entry *)p->data;
-       if (entry == NULL || entry->disconnected) {
+       if (entry == NULL || ! entry->p) {
                mutex_unlock(&info_mutex);
                return -ENODEV;
        }
@@ -586,10 +587,10 @@ int __exit snd_info_done(void)
        snd_info_version_done();
        if (snd_proc_root) {
 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
-               snd_info_unregister(snd_seq_root);
+               snd_info_free_entry(snd_seq_root);
 #endif
 #ifdef CONFIG_SND_OSSEMUL
-               snd_info_unregister(snd_oss_root);
+               snd_info_free_entry(snd_oss_root);
 #endif
                snd_remove_proc_entry(&proc_root, snd_proc_root);
        }
@@ -648,17 +649,28 @@ int snd_info_card_register(struct snd_card *card)
  * de-register the card proc file
  * called from init.c
  */
-int snd_info_card_free(struct snd_card *card)
+void snd_info_card_disconnect(struct snd_card *card)
 {
-       snd_assert(card != NULL, return -ENXIO);
+       snd_assert(card != NULL, return);
+       mutex_lock(&info_mutex);
        if (card->proc_root_link) {
                snd_remove_proc_entry(snd_proc_root, card->proc_root_link);
                card->proc_root_link = NULL;
        }
-       if (card->proc_root) {
-               snd_info_unregister(card->proc_root);
-               card->proc_root = NULL;
-       }
+       if (card->proc_root)
+               snd_info_disconnect(card->proc_root);
+       mutex_unlock(&info_mutex);
+}
+
+/*
+ * release the card proc file resources
+ * called from init.c
+ */
+int snd_info_card_free(struct snd_card *card)
+{
+       snd_assert(card != NULL, return -ENXIO);
+       snd_info_free_entry(card->proc_root);
+       card->proc_root = NULL;
        return 0;
 }
 
@@ -767,6 +779,8 @@ static struct snd_info_entry *snd_info_create_entry(const char *name)
        entry->mode = S_IFREG | S_IRUGO;
        entry->content = SNDRV_INFO_CONTENT_TEXT;
        mutex_init(&entry->access);
+       INIT_LIST_HEAD(&entry->children);
+       INIT_LIST_HEAD(&entry->list);
        return entry;
 }
 
@@ -819,30 +833,35 @@ struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card,
 
 EXPORT_SYMBOL(snd_info_create_card_entry);
 
-static int snd_info_dev_free_entry(struct snd_device *device)
+static void snd_info_disconnect(struct snd_info_entry *entry)
 {
-       struct snd_info_entry *entry = device->device_data;
-       snd_info_free_entry(entry);
-       return 0;
-}
+       struct list_head *p, *n;
+       struct proc_dir_entry *root;
 
-static int snd_info_dev_register_entry(struct snd_device *device)
-{
-       struct snd_info_entry *entry = device->device_data;
-       return snd_info_register(entry);
+       list_for_each_safe(p, n, &entry->children) {
+               snd_info_disconnect(list_entry(p, struct snd_info_entry, list));
+       }
+
+       if (! entry->p)
+               return;
+       list_del_init(&entry->list);
+       root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
+       snd_assert(root, return);
+       snd_remove_proc_entry(root, entry->p);
+       entry->p = NULL;
 }
 
-static int snd_info_dev_disconnect_entry(struct snd_device *device)
+static int snd_info_dev_free_entry(struct snd_device *device)
 {
        struct snd_info_entry *entry = device->device_data;
-       entry->disconnected = 1;
+       snd_info_free_entry(entry);
        return 0;
 }
 
-static int snd_info_dev_unregister_entry(struct snd_device *device)
+static int snd_info_dev_register_entry(struct snd_device *device)
 {
        struct snd_info_entry *entry = device->device_data;
-       return snd_info_unregister(entry);
+       return snd_info_register(entry);
 }
 
 /**
@@ -871,8 +890,7 @@ int snd_card_proc_new(struct snd_card *card, const char *name,
        static struct snd_device_ops ops = {
                .dev_free = snd_info_dev_free_entry,
                .dev_register = snd_info_dev_register_entry,
-               .dev_disconnect = snd_info_dev_disconnect_entry,
-               .dev_unregister = snd_info_dev_unregister_entry
+               /* disconnect is done via snd_info_card_disconnect() */
        };
        struct snd_info_entry *entry;
        int err;
@@ -901,6 +919,11 @@ void snd_info_free_entry(struct snd_info_entry * entry)
 {
        if (entry == NULL)
                return;
+       if (entry->p) {
+               mutex_lock(&info_mutex);
+               snd_info_disconnect(entry);
+               mutex_unlock(&info_mutex);
+       }
        kfree(entry->name);
        if (entry->private_free)
                entry->private_free(entry);
@@ -935,38 +958,14 @@ int snd_info_register(struct snd_info_entry * entry)
        p->size = entry->size;
        p->data = entry;
        entry->p = p;
+       if (entry->parent)
+               list_add_tail(&entry->list, &entry->parent->children);
        mutex_unlock(&info_mutex);
        return 0;
 }
 
 EXPORT_SYMBOL(snd_info_register);
 
-/**
- * snd_info_unregister - de-register the info entry
- * @entry: the info entry
- *
- * De-registers the info entry and releases the instance.
- *
- * Returns zero if successful, or a negative error code on failure.
- */
-int snd_info_unregister(struct snd_info_entry * entry)
-{
-       struct proc_dir_entry *root;
-
-       if (! entry)
-               return 0;
-       snd_assert(entry->p != NULL, return -ENXIO);
-       root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
-       snd_assert(root, return -ENXIO);
-       mutex_lock(&info_mutex);
-       snd_remove_proc_entry(root, entry->p);
-       mutex_unlock(&info_mutex);
-       snd_info_free_entry(entry);
-       return 0;
-}
-
-EXPORT_SYMBOL(snd_info_unregister);
-
 /*
 
  */
@@ -999,8 +998,7 @@ static int __init snd_info_version_init(void)
 
 static int __exit snd_info_version_done(void)
 {
-       if (snd_info_version_entry)
-               snd_info_unregister(snd_info_version_entry);
+       snd_info_free_entry(snd_info_version_entry);
        return 0;
 }