#include <linux/mutex.h>
#include <stdarg.h>
-/*
- *
- */
-
-#ifdef CONFIG_PROC_FS
-
int snd_info_check_reserved_words(const char *str)
{
static char *reserved[] =
return entry;
}
-static struct snd_info_entry *snd_info_create_entry(const char *name);
+static struct snd_info_entry *
+snd_info_create_entry(const char *name, struct snd_info_entry *parent);
int __init snd_info_init(void)
{
- snd_proc_root = snd_info_create_entry("asound");
+ snd_proc_root = snd_info_create_entry("asound", NULL);
if (!snd_proc_root)
return -ENOMEM;
snd_proc_root->mode = S_IFDIR | S_IRUGO | S_IXUGO;
if (!snd_seq_root)
goto error;
#endif
- snd_info_version_init();
- snd_minor_info_init();
- snd_minor_info_oss_init();
- snd_card_info_init();
+ if (snd_info_version_init() < 0 ||
+ snd_minor_info_init() < 0 ||
+ snd_minor_info_oss_init() < 0 ||
+ snd_card_info_init() < 0 ||
+ snd_info_minor_register() < 0)
+ goto error;
return 0;
error:
int __exit snd_info_done(void)
{
- snd_card_info_done();
- snd_minor_info_oss_done();
- snd_minor_info_done();
snd_info_free_entry(snd_proc_root);
return 0;
}
return 0;
}
+/* register all pending info entries */
+static int snd_info_register_recursive(struct snd_info_entry *entry)
+{
+ struct snd_info_entry *p;
+ int err;
+
+ if (!entry->p) {
+ err = snd_info_register(entry);
+ if (err < 0)
+ return err;
+ }
+
+ list_for_each_entry(p, &entry->children, list) {
+ err = snd_info_register_recursive(p);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
/*
* register the card proc file
* called from init.c
+ * can be called multiple times for reinitialization
*/
int snd_info_card_register(struct snd_card *card)
{
struct proc_dir_entry *p;
+ int err;
if (snd_BUG_ON(!card))
return -ENXIO;
+ err = snd_info_register_recursive(card->proc_root);
+ if (err < 0)
+ return err;
+
if (!strcmp(card->id, card->proc_root->name))
return 0;
+ if (card->proc_root_link)
+ return 0;
p = proc_symlink(card->id, snd_proc_root->p, card->proc_root->name);
- if (p == NULL)
+ if (!p)
return -ENOMEM;
card->proc_root_link = p;
return 0;
EXPORT_SYMBOL(snd_info_get_str);
-/**
+/*
* snd_info_create_entry - create an info entry
* @name: the proc file name
+ * @parent: the parent directory
*
* Creates an info entry with the given file name and initializes as
* the default state.
*
* Return: The pointer of the new instance, or %NULL on failure.
*/
-static struct snd_info_entry *snd_info_create_entry(const char *name)
+static struct snd_info_entry *
+snd_info_create_entry(const char *name, struct snd_info_entry *parent)
{
struct snd_info_entry *entry;
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
mutex_init(&entry->access);
INIT_LIST_HEAD(&entry->children);
INIT_LIST_HEAD(&entry->list);
+ entry->parent = parent;
+ if (parent)
+ list_add_tail(&entry->list, &parent->children);
return entry;
}
const char *name,
struct snd_info_entry *parent)
{
- struct snd_info_entry *entry = snd_info_create_entry(name);
- if (entry) {
+ struct snd_info_entry *entry = snd_info_create_entry(name, parent);
+ if (entry)
entry->module = module;
- entry->parent = parent;
- }
return entry;
}
const char *name,
struct snd_info_entry * parent)
{
- struct snd_info_entry *entry = snd_info_create_entry(name);
+ struct snd_info_entry *entry = snd_info_create_entry(name, parent);
if (entry) {
entry->module = card->module;
entry->card = card;
- entry->parent = parent;
}
return entry;
}
static void snd_info_disconnect(struct snd_info_entry *entry)
{
- struct snd_info_entry *p, *n;
+ struct snd_info_entry *p;
if (!entry->p)
return;
- list_for_each_entry_safe(p, n, &entry->children, list)
+ list_for_each_entry(p, &entry->children, list)
snd_info_disconnect(p);
- list_del_init(&entry->list);
proc_remove(entry->p);
entry->p = NULL;
}
list_for_each_entry_safe(p, n, &entry->children, list)
snd_info_free_entry(p);
+ list_del(&entry->list);
kfree(entry->name);
if (entry->private_free)
entry->private_free(entry);
proc_set_size(p, entry->size);
}
entry->p = p;
- if (entry->parent)
- list_add_tail(&entry->list, &entry->parent->children);
mutex_unlock(&info_mutex);
return 0;
}
if (entry == NULL)
return -ENOMEM;
entry->c.text.read = snd_info_version_read;
- if (snd_info_register(entry) < 0) {
- snd_info_free_entry(entry);
- return -ENOMEM;
- }
- return 0;
+ return snd_info_register(entry); /* freed in error path */
}
-
-#endif /* CONFIG_PROC_FS */