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authorTakashi Iwai <tiwai@suse.de>2015-02-27 18:01:22 +0100
committerTakashi Iwai <tiwai@suse.de>2015-03-03 11:26:28 +0100
commite086e3035e0691b362755d1b5e24df631eee335a (patch)
treeb803d38bb739c3de78d7ed74fd99b397fa9ecfe7
parent61ca4107a16828559e2463e49b87002990da0b98 (diff)
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ALSA: core: Re-add snd_device_disconnect()
Revive snd_device_disconnect() again so that it can be called from the individual driver. This time, HD-audio will need it. Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--include/sound/core.h3
-rw-r--r--sound/core/device.c43
-rw-r--r--sound/core/init.c5
3 files changed, 36 insertions, 15 deletions
diff --git a/include/sound/core.h b/include/sound/core.h
index da5748289968..b12931f513f4 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -278,7 +278,8 @@ int snd_device_new(struct snd_card *card, enum snd_device_type type,
void *device_data, struct snd_device_ops *ops);
int snd_device_register(struct snd_card *card, void *device_data);
int snd_device_register_all(struct snd_card *card);
-int snd_device_disconnect_all(struct snd_card *card);
+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);
diff --git a/sound/core/device.c b/sound/core/device.c
index 41bec3075ae5..446dc452654e 100644
--- a/sound/core/device.c
+++ b/sound/core/device.c
@@ -73,7 +73,7 @@ int snd_device_new(struct snd_card *card, enum snd_device_type type,
}
EXPORT_SYMBOL(snd_device_new);
-static int __snd_device_disconnect(struct snd_device *dev)
+static void __snd_device_disconnect(struct snd_device *dev)
{
if (dev->state == SNDRV_DEV_REGISTERED) {
if (dev->ops->dev_disconnect &&
@@ -81,7 +81,6 @@ static int __snd_device_disconnect(struct snd_device *dev)
dev_err(dev->card->dev, "device disconnect failure\n");
dev->state = SNDRV_DEV_DISCONNECTED;
}
- return 0;
}
static void __snd_device_free(struct snd_device *dev)
@@ -109,6 +108,34 @@ static struct snd_device *look_for_dev(struct snd_card *card, void *device_data)
}
/**
+ * snd_device_disconnect - disconnect the device
+ * @card: the card instance
+ * @device_data: the data pointer to disconnect
+ *
+ * Turns the device into the disconnection state, invoking
+ * dev_disconnect callback, if the device was already registered.
+ *
+ * Usually called from snd_card_disconnect().
+ *
+ * Return: Zero if successful, or a negative error code on failure or if the
+ * device not found.
+ */
+void snd_device_disconnect(struct snd_card *card, void *device_data)
+{
+ struct snd_device *dev;
+
+ if (snd_BUG_ON(!card || !device_data))
+ return;
+ dev = look_for_dev(card, device_data);
+ if (dev)
+ __snd_device_disconnect(dev);
+ else
+ dev_dbg(card->dev, "device disconnect %p (from %pF), not found\n",
+ device_data, __builtin_return_address(0));
+}
+EXPORT_SYMBOL_GPL(snd_device_disconnect);
+
+/**
* snd_device_free - release the device from the card
* @card: the card instance
* @device_data: the data pointer to release
@@ -195,18 +222,14 @@ int snd_device_register_all(struct snd_card *card)
* disconnect all the devices on the card.
* called from init.c
*/
-int snd_device_disconnect_all(struct snd_card *card)
+void snd_device_disconnect_all(struct snd_card *card)
{
struct snd_device *dev;
- int err = 0;
if (snd_BUG_ON(!card))
- return -ENXIO;
- list_for_each_entry_reverse(dev, &card->devices, list) {
- if (__snd_device_disconnect(dev) < 0)
- err = -ENXIO;
- }
- return err;
+ return;
+ list_for_each_entry_reverse(dev, &card->devices, list)
+ __snd_device_disconnect(dev);
}
/*
diff --git a/sound/core/init.c b/sound/core/init.c
index 35419054821c..04734e047bfe 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -400,7 +400,6 @@ static const struct file_operations snd_shutdown_f_ops =
int snd_card_disconnect(struct snd_card *card)
{
struct snd_monitor_file *mfile;
- int err;
if (!card)
return -EINVAL;
@@ -445,9 +444,7 @@ int snd_card_disconnect(struct snd_card *card)
#endif
/* notify all devices that we are disconnected */
- err = snd_device_disconnect_all(card);
- if (err < 0)
- dev_err(card->dev, "not all devices for card %i can be disconnected\n", card->number);
+ snd_device_disconnect_all(card);
snd_info_card_disconnect(card);
if (card->registered) {