diff options
Diffstat (limited to 'sound/core/init.c')
| -rw-r--r-- | sound/core/init.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index 726a8353201f..193dae361fac 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -215,6 +215,8 @@ static void __snd_card_release(struct device *dev, void *data) * via snd_card_free() call in the error; otherwise it may lead to UAF due to * devres call orders. You can use snd_card_free_on_error() helper for * handling it more easily. + * + * Return: zero if successful, or a negative error code */ int snd_devm_card_new(struct device *parent, int idx, const char *xid, struct module *module, size_t extra_size, @@ -249,6 +251,8 @@ EXPORT_SYMBOL_GPL(snd_devm_card_new); * This function handles the explicit snd_card_free() call at the error from * the probe callback. It's just a small helper for simplifying the error * handling with the managed devices. + * + * Return: zero if successful, or a negative error code */ int snd_card_free_on_error(struct device *dev, int ret) { @@ -310,6 +314,10 @@ static int snd_card_init(struct snd_card *card, struct device *parent, rwlock_init(&card->ctl_files_rwlock); INIT_LIST_HEAD(&card->controls); INIT_LIST_HEAD(&card->ctl_files); +#ifdef CONFIG_SND_CTL_FAST_LOOKUP + xa_init(&card->ctl_numids); + xa_init(&card->ctl_hash); +#endif spin_lock_init(&card->files_lock); INIT_LIST_HEAD(&card->files_list); mutex_init(&card->memory_mutex); @@ -366,6 +374,8 @@ static int snd_card_init(struct snd_card *card, struct device *parent, * * Returns a card object corresponding to the given index or NULL if not found. * Release the object via snd_card_unref(). + * + * Return: a card object or NULL */ struct snd_card *snd_card_ref(int idx) { @@ -604,6 +614,8 @@ static int snd_card_do_free(struct snd_card *card) * resource immediately, but tries to disconnect at first. When the card * is still in use, the function returns before freeing the resources. * The card resources will be freed when the refcount gets to zero. + * + * Return: zero if successful, or a negative error code */ int snd_card_free_when_closed(struct snd_card *card) { @@ -772,7 +784,7 @@ static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct snd_card *card = container_of(dev, struct snd_card, card_dev); - return scnprintf(buf, PAGE_SIZE, "%s\n", card->id); + return sysfs_emit(buf, "%s\n", card->id); } static ssize_t id_store(struct device *dev, struct device_attribute *attr, @@ -810,7 +822,7 @@ static ssize_t number_show(struct device *dev, struct device_attribute *attr, char *buf) { struct snd_card *card = container_of(dev, struct snd_card, card_dev); - return scnprintf(buf, PAGE_SIZE, "%i\n", card->number); + return sysfs_emit(buf, "%i\n", card->number); } static DEVICE_ATTR_RO(number); @@ -829,6 +841,8 @@ static const struct attribute_group card_dev_attr_group = { * snd_card_add_dev_attr - Append a new sysfs attribute group to card * @card: card instance * @group: attribute group to append + * + * Return: zero if successful, or a negative error code */ int snd_card_add_dev_attr(struct snd_card *card, const struct attribute_group *group) |