diff options
| -rw-r--r-- | include/sound/core.h | 1 | ||||
| -rw-r--r-- | sound/core/device.c | 21 |
2 files changed, 22 insertions, 0 deletions
diff --git a/include/sound/core.h b/include/sound/core.h index ac8b692b69b4..381a010a1bd4 100644 --- a/include/sound/core.h +++ b/include/sound/core.h @@ -266,6 +266,7 @@ void snd_device_disconnect(struct snd_card *card, void *device_data); void snd_device_disconnect_all(struct snd_card *card); void snd_device_free(struct snd_card *card, void *device_data); void snd_device_free_all(struct snd_card *card); +int snd_device_get_state(struct snd_card *card, void *device_data); /* isadma.c */ diff --git a/sound/core/device.c b/sound/core/device.c index cdc5af526739..bf0b04a7ee79 100644 --- a/sound/core/device.c +++ b/sound/core/device.c @@ -237,3 +237,24 @@ void snd_device_free_all(struct snd_card *card) list_for_each_entry_safe_reverse(dev, next, &card->devices, list) __snd_device_free(dev); } + +/** + * snd_device_get_state - Get the current state of the given device + * @card: the card instance + * @device_data: the data pointer to release + * + * Returns the current state of the given device object. For the valid + * device, either @SNDRV_DEV_BUILD, @SNDRV_DEV_REGISTERED or + * @SNDRV_DEV_DISCONNECTED is returned. + * Or for a non-existing device, -1 is returned as an error. + */ +int snd_device_get_state(struct snd_card *card, void *device_data) +{ + struct snd_device *dev; + + dev = look_for_dev(card, device_data); + if (dev) + return dev->state; + return -1; +} +EXPORT_SYMBOL_GPL(snd_device_get_state); |