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-rw-r--r--sound/core/init.c33
1 files changed, 22 insertions, 11 deletions
diff --git a/sound/core/init.c b/sound/core/init.c
index 7bdfd19..074875d 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -438,17 +438,6 @@ int snd_card_disconnect(struct snd_card *card)
EXPORT_SYMBOL(snd_card_disconnect);
-/**
- * snd_card_free - frees given soundcard structure
- * @card: soundcard structure
- *
- * This function releases the soundcard structure and the all assigned
- * devices automatically. That is, you don't have to release the devices
- * by yourself.
- *
- * Return: Zero. Frees all associated devices and frees the control
- * interface associated to given soundcard.
- */
static int snd_card_do_free(struct snd_card *card)
{
#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
@@ -469,6 +458,15 @@ static int snd_card_do_free(struct snd_card *card)
return 0;
}
+/**
+ * snd_card_free_when_closed - Disconnect the card, free it later eventually
+ * @card: soundcard structure
+ *
+ * Unlike snd_card_free(), this function doesn't try to release the 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.
+ */
int snd_card_free_when_closed(struct snd_card *card)
{
int ret = snd_card_disconnect(card);
@@ -479,6 +477,19 @@ int snd_card_free_when_closed(struct snd_card *card)
}
EXPORT_SYMBOL(snd_card_free_when_closed);
+/**
+ * snd_card_free - frees given soundcard structure
+ * @card: soundcard structure
+ *
+ * This function releases the soundcard structure and the all assigned
+ * devices automatically. That is, you don't have to release the devices
+ * by yourself.
+ *
+ * This function waits until the all resources are properly released.
+ *
+ * Return: Zero. Frees all associated devices and frees the control
+ * interface associated to given soundcard.
+ */
int snd_card_free(struct snd_card *card)
{
struct completion released;
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