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Diffstat (limited to 'sound/core/control.c')
-rw-r--r--sound/core/control.c69
1 files changed, 50 insertions, 19 deletions
diff --git a/sound/core/control.c b/sound/core/control.c
index 180e5768a10f..30741293708d 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -475,7 +475,7 @@ static int __snd_ctl_add_replace(struct snd_card *card,
if (id.index > UINT_MAX - kcontrol->count)
return -EINVAL;
- old = snd_ctl_find_id(card, &id);
+ old = snd_ctl_find_id_locked(card, &id);
if (!old) {
if (mode == CTL_REPLACE)
return -EINVAL;
@@ -641,7 +641,7 @@ int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id)
int ret;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, id);
+ kctl = snd_ctl_find_id_locked(card, id);
if (kctl == NULL) {
up_write(&card->controls_rwsem);
return -ENOENT;
@@ -670,7 +670,7 @@ static int snd_ctl_remove_user_ctl(struct snd_ctl_file * file,
int idx, ret;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, id);
+ kctl = snd_ctl_find_id_locked(card, id);
if (kctl == NULL) {
ret = -ENOENT;
goto error;
@@ -711,7 +711,7 @@ int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
int ret;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, id);
+ kctl = snd_ctl_find_id_locked(card, id);
if (kctl == NULL) {
ret = -ENOENT;
goto unlock;
@@ -765,7 +765,7 @@ int snd_ctl_rename_id(struct snd_card *card, struct snd_ctl_elem_id *src_id,
int saved_numid;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, src_id);
+ kctl = snd_ctl_find_id_locked(card, src_id);
if (kctl == NULL) {
up_write(&card->controls_rwsem);
return -ENOENT;
@@ -820,7 +820,7 @@ snd_ctl_find_numid_slow(struct snd_card *card, unsigned int numid)
#endif /* !CONFIG_SND_CTL_FAST_LOOKUP */
/**
- * snd_ctl_find_numid - find the control instance with the given number-id
+ * snd_ctl_find_numid_locked - find the control instance with the given number-id
* @card: the card instance
* @numid: the number-id to search
*
@@ -830,9 +830,9 @@ snd_ctl_find_numid_slow(struct snd_card *card, unsigned int numid)
* (if the race condition can happen).
*
* Return: The pointer of the instance if found, or %NULL if not.
- *
*/
-struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid)
+struct snd_kcontrol *
+snd_ctl_find_numid_locked(struct snd_card *card, unsigned int numid)
{
if (snd_BUG_ON(!card || !numid))
return NULL;
@@ -842,10 +842,26 @@ struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numi
return snd_ctl_find_numid_slow(card, numid);
#endif
}
+EXPORT_SYMBOL(snd_ctl_find_numid_locked);
+
+/**
+ * snd_ctl_find_numid - find the control instance with the given number-id
+ * @card: the card instance
+ * @numid: the number-id to search
+ *
+ * Finds the control instance with the given number-id from the card.
+ *
+ * Return: The pointer of the instance if found, or %NULL if not.
+ */
+struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card,
+ unsigned int numid)
+{
+ return snd_ctl_find_numid_locked(card, numid);
+}
EXPORT_SYMBOL(snd_ctl_find_numid);
/**
- * snd_ctl_find_id - find the control instance with the given id
+ * snd_ctl_find_id_locked - find the control instance with the given id
* @card: the card instance
* @id: the id to search
*
@@ -855,17 +871,16 @@ EXPORT_SYMBOL(snd_ctl_find_numid);
* (if the race condition can happen).
*
* Return: The pointer of the instance if found, or %NULL if not.
- *
*/
-struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
- const struct snd_ctl_elem_id *id)
+struct snd_kcontrol *snd_ctl_find_id_locked(struct snd_card *card,
+ const struct snd_ctl_elem_id *id)
{
struct snd_kcontrol *kctl;
if (snd_BUG_ON(!card || !id))
return NULL;
if (id->numid != 0)
- return snd_ctl_find_numid(card, id->numid);
+ return snd_ctl_find_numid_locked(card, id->numid);
#ifdef CONFIG_SND_CTL_FAST_LOOKUP
kctl = xa_load(&card->ctl_hash, get_ctl_id_hash(id));
if (kctl && elem_id_matches(kctl, id))
@@ -880,6 +895,22 @@ struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
return NULL;
}
+EXPORT_SYMBOL(snd_ctl_find_id_locked);
+
+/**
+ * snd_ctl_find_id - find the control instance with the given id
+ * @card: the card instance
+ * @id: the id to search
+ *
+ * Finds the control instance with the given id from the card.
+ *
+ * Return: The pointer of the instance if found, or %NULL if not.
+ */
+struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
+ const struct snd_ctl_elem_id *id)
+{
+ return snd_ctl_find_id_locked(card, id);
+}
EXPORT_SYMBOL(snd_ctl_find_id);
static int snd_ctl_card_info(struct snd_card *card, struct snd_ctl_file * ctl,
@@ -1194,7 +1225,7 @@ static int snd_ctl_elem_info(struct snd_ctl_file *ctl,
int result;
down_read(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, &info->id);
+ kctl = snd_ctl_find_id_locked(card, &info->id);
if (kctl == NULL)
result = -ENOENT;
else
@@ -1233,7 +1264,7 @@ static int snd_ctl_elem_read(struct snd_card *card,
int ret;
down_read(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, &control->id);
+ kctl = snd_ctl_find_id_locked(card, &control->id);
if (kctl == NULL) {
ret = -ENOENT;
goto unlock;
@@ -1310,7 +1341,7 @@ static int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file,
int result;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, &control->id);
+ kctl = snd_ctl_find_id_locked(card, &control->id);
if (kctl == NULL) {
up_write(&card->controls_rwsem);
return -ENOENT;
@@ -1391,7 +1422,7 @@ static int snd_ctl_elem_lock(struct snd_ctl_file *file,
if (copy_from_user(&id, _id, sizeof(id)))
return -EFAULT;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, &id);
+ kctl = snd_ctl_find_id_locked(card, &id);
if (kctl == NULL) {
result = -ENOENT;
} else {
@@ -1419,7 +1450,7 @@ static int snd_ctl_elem_unlock(struct snd_ctl_file *file,
if (copy_from_user(&id, _id, sizeof(id)))
return -EFAULT;
down_write(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, &id);
+ kctl = snd_ctl_find_id_locked(card, &id);
if (kctl == NULL) {
result = -ENOENT;
} else {
@@ -1927,7 +1958,7 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file,
container_size = header.length;
container = buf->tlv;
- kctl = snd_ctl_find_numid(file->card, header.numid);
+ kctl = snd_ctl_find_numid_locked(file->card, header.numid);
if (kctl == NULL)
return -ENOENT;
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-30 22:49:11 +0300