*
* Return: Zero if successful, or a negative error code on failure.
*/
-int snd_device_new(struct snd_card *card, snd_device_type_t type,
+int snd_device_new(struct snd_card *card, enum snd_device_type type,
void *device_data, struct snd_device_ops *ops)
{
struct snd_device *dev;
+ struct list_head *p;
if (snd_BUG_ON(!card || !device_data || !ops))
return -ENXIO;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
- snd_printk(KERN_ERR "Cannot allocate device\n");
+ dev_err(card->dev, "Cannot allocate device, type=%d\n", type);
return -ENOMEM;
}
+ INIT_LIST_HEAD(&dev->list);
dev->card = card;
dev->type = type;
dev->state = SNDRV_DEV_BUILD;
dev->device_data = device_data;
dev->ops = ops;
- list_add(&dev->list, &card->devices); /* add to the head of list */
+
+ /* insert the entry in an incrementally sorted list */
+ list_for_each_prev(p, &card->devices) {
+ struct snd_device *pdev = list_entry(p, struct snd_device, list);
+ if ((unsigned int)pdev->type <= (unsigned int)type)
+ break;
+ }
+
+ list_add(&dev->list, p);
return 0;
}
-
EXPORT_SYMBOL(snd_device_new);
+static int __snd_device_disconnect(struct snd_device *dev)
+{
+ if (dev->state == SNDRV_DEV_REGISTERED) {
+ if (dev->ops->dev_disconnect &&
+ dev->ops->dev_disconnect(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)
+{
+ /* unlink */
+ list_del(&dev->list);
+
+ __snd_device_disconnect(dev);
+ if (dev->ops->dev_free) {
+ if (dev->ops->dev_free(dev))
+ dev_err(dev->card->dev, "device free failure\n");
+ }
+ kfree(dev);
+}
+
+static struct snd_device *look_for_dev(struct snd_card *card, void *device_data)
+{
+ struct snd_device *dev;
+
+ list_for_each_entry(dev, &card->devices, list)
+ if (dev->device_data == device_data)
+ return dev;
+
+ return NULL;
+}
+
/**
* snd_device_free - release the device from the card
* @card: the card instance
* Removes the device from the list on the card and invokes the
* callbacks, dev_disconnect and dev_free, corresponding to the state.
* Then release the device.
- *
- * Return: Zero if successful, or a negative error code on failure or if the
- * device not found.
*/
-int snd_device_free(struct snd_card *card, void *device_data)
+void snd_device_free(struct snd_card *card, void *device_data)
{
struct snd_device *dev;
if (snd_BUG_ON(!card || !device_data))
- return -ENXIO;
- list_for_each_entry(dev, &card->devices, list) {
- if (dev->device_data != device_data)
- continue;
- /* unlink */
- list_del(&dev->list);
- if (dev->state == SNDRV_DEV_REGISTERED &&
- dev->ops->dev_disconnect)
- if (dev->ops->dev_disconnect(dev))
- snd_printk(KERN_ERR
- "device disconnect failure\n");
- if (dev->ops->dev_free) {
- if (dev->ops->dev_free(dev))
- snd_printk(KERN_ERR "device free failure\n");
- }
- kfree(dev);
- return 0;
- }
- snd_printd("device free %p (from %pF), not found\n", device_data,
- __builtin_return_address(0));
- return -ENXIO;
+ return;
+ dev = look_for_dev(card, device_data);
+ if (dev)
+ __snd_device_free(dev);
+ else
+ dev_dbg(card->dev, "device free %p (from %pF), not found\n",
+ device_data, __builtin_return_address(0));
}
-
EXPORT_SYMBOL(snd_device_free);
-/**
- * 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.
- */
-int snd_device_disconnect(struct snd_card *card, void *device_data)
+static int __snd_device_register(struct snd_device *dev)
{
- struct snd_device *dev;
-
- if (snd_BUG_ON(!card || !device_data))
- return -ENXIO;
- list_for_each_entry(dev, &card->devices, list) {
- if (dev->device_data != device_data)
- continue;
- if (dev->state == SNDRV_DEV_REGISTERED &&
- dev->ops->dev_disconnect) {
- if (dev->ops->dev_disconnect(dev))
- snd_printk(KERN_ERR "device disconnect failure\n");
- dev->state = SNDRV_DEV_DISCONNECTED;
+ if (dev->state == SNDRV_DEV_BUILD) {
+ if (dev->ops->dev_register) {
+ int err = dev->ops->dev_register(dev);
+ if (err < 0)
+ return err;
}
- return 0;
+ dev->state = SNDRV_DEV_REGISTERED;
}
- snd_printd("device disconnect %p (from %pF), not found\n", device_data,
- __builtin_return_address(0));
- return -ENXIO;
+ return 0;
}
/**
int snd_device_register(struct snd_card *card, void *device_data)
{
struct snd_device *dev;
- int err;
if (snd_BUG_ON(!card || !device_data))
return -ENXIO;
- list_for_each_entry(dev, &card->devices, list) {
- if (dev->device_data != device_data)
- continue;
- if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
- if ((err = dev->ops->dev_register(dev)) < 0)
- return err;
- dev->state = SNDRV_DEV_REGISTERED;
- return 0;
- }
- snd_printd("snd_device_register busy\n");
- return -EBUSY;
- }
+ dev = look_for_dev(card, device_data);
+ if (dev)
+ return __snd_device_register(dev);
snd_BUG();
return -ENXIO;
}
-
EXPORT_SYMBOL(snd_device_register);
/*
if (snd_BUG_ON(!card))
return -ENXIO;
list_for_each_entry(dev, &card->devices, list) {
- if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
- if ((err = dev->ops->dev_register(dev)) < 0)
- return err;
- dev->state = SNDRV_DEV_REGISTERED;
- }
+ err = __snd_device_register(dev);
+ if (err < 0)
+ return err;
}
return 0;
}
if (snd_BUG_ON(!card))
return -ENXIO;
- list_for_each_entry(dev, &card->devices, list) {
- if (snd_device_disconnect(card, dev->device_data) < 0)
+ list_for_each_entry_reverse(dev, &card->devices, list) {
+ if (__snd_device_disconnect(dev) < 0)
err = -ENXIO;
}
return err;
* release all the devices on the card.
* called from init.c
*/
-int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd)
+void snd_device_free_all(struct snd_card *card)
{
- struct snd_device *dev;
- int err;
- unsigned int range_low, range_high, type;
+ struct snd_device *dev, *next;
if (snd_BUG_ON(!card))
- return -ENXIO;
- range_low = (__force unsigned int)cmd * SNDRV_DEV_TYPE_RANGE_SIZE;
- range_high = range_low + SNDRV_DEV_TYPE_RANGE_SIZE - 1;
- __again:
- list_for_each_entry(dev, &card->devices, list) {
- type = (__force unsigned int)dev->type;
- if (type >= range_low && type <= range_high) {
- if ((err = snd_device_free(card, dev->device_data)) < 0)
- return err;
- goto __again;
- }
- }
- return 0;
+ return;
+ list_for_each_entry_safe_reverse(dev, next, &card->devices, list)
+ __snd_device_free(dev);
}
projects / deliverable / linux.git / blobdiff