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Commit e086e303 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent 61ca4107

include/sound/core.h

+2 −1
Original line number Diff line number Diff line
@@ -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);

sound/core/device.c

+33 −10
Original line number Diff line number Diff line
@@ -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)
@@ -108,6 +107,34 @@ static struct snd_device *look_for_dev(struct snd_card *card, void *device_data) 
	return NULL;

}



/**

 * 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
@@ -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);

}



/*

sound/core/init.c

+1 −4
Original line number Diff line number Diff line
@@ -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) {