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Commit 2b29b13c authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
Browse files

[ALSA] Deprecate snd_card_free_in_thread() 



Deprecated snd_card_free_in_thread(), replaced with
snd_card_free_when_closed().

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent c461482c

Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl

+2 −3
Original line number Diff line number Diff line
@@ -1054,9 +1054,8 @@ 


      <para>

      For a device which allows hotplugging, you can use

      <function>snd_card_free_in_thread</function>.  This one will

      postpone the destruction and wait in a kernel-thread until all

      devices are closed.

      <function>snd_card_free_when_closed</function>.  This one will

      postpone the destruction until all devices are closed.

      </para>



    </section>

include/sound/core.h

+0 −3
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ 
#include <linux/sched.h>		/* wake_up() */

#include <linux/mutex.h>		/* struct mutex */

#include <linux/rwsem.h>		/* struct rw_semaphore */

#include <linux/workqueue.h>		/* struct workqueue_struct */

#include <linux/pm.h>			/* pm_message_t */



/* forward declarations */
@@ -132,7 +131,6 @@ struct snd_card { 
	int shutdown;			/* this card is going down */

	int free_on_last_close;		/* free in context of file_release */

	wait_queue_head_t shutdown_sleep;

	struct work_struct free_workq;	/* for free in workqueue */

	struct device *dev;



#ifdef CONFIG_PM
@@ -245,7 +243,6 @@ struct snd_card *snd_card_new(int idx, const char *id, 
int snd_card_disconnect(struct snd_card *card);

int snd_card_free(struct snd_card *card);

int snd_card_free_when_closed(struct snd_card *card);

int snd_card_free_in_thread(struct snd_card *card);

int snd_card_register(struct snd_card *card);

int snd_card_info_init(void);

int snd_card_info_done(void);

sound/core/init.c

+3 −53
Original line number Diff line number Diff line
@@ -81,8 +81,6 @@ static inline int init_info_for_card(struct snd_card *card) 
#define init_info_for_card(card)

#endif



static void snd_card_free_thread(void * __card);



/**

 *  snd_card_new - create and initialize a soundcard structure

 *  @idx: card index (address) [0 ... (SNDRV_CARDS-1)]
@@ -145,7 +143,6 @@ struct snd_card *snd_card_new(int idx, const char *xid, 
	INIT_LIST_HEAD(&card->ctl_files);

	spin_lock_init(&card->files_lock);

	init_waitqueue_head(&card->shutdown_sleep);

	INIT_WORK(&card->free_workq, snd_card_free_thread, card);

#ifdef CONFIG_PM

	mutex_init(&card->power_lock);

	init_waitqueue_head(&card->power_sleep);
@@ -413,53 +410,6 @@ int snd_card_free(struct snd_card *card) 


EXPORT_SYMBOL(snd_card_free);



static void snd_card_free_thread(void * __card)

{

	struct snd_card *card = __card;

	struct module * module = card->module;



	if (!try_module_get(module)) {

		snd_printk(KERN_ERR "unable to lock toplevel module for card %i in free thread\n", card->number);

		module = NULL;

	}



	snd_card_free(card);



	module_put(module);

}



/**

 *  snd_card_free_in_thread - call snd_card_free() in thread

 *  @card: soundcard structure

 *

 *  This function schedules the call of snd_card_free() function in a

 *  work queue.  When all devices are released (non-busy), the work

 *  is woken up and calls snd_card_free().

 *

 *  When a card can be disconnected at any time by hotplug service,

 *  this function should be used in disconnect (or detach) callback

 *  instead of calling snd_card_free() directly.

 *  

 *  Returns - zero otherwise a negative error code if the start of thread failed.

 */

int snd_card_free_in_thread(struct snd_card *card)

{

	if (card->files == NULL) {

		snd_card_free(card);

		return 0;

	}



	if (schedule_work(&card->free_workq))

		return 0;



	snd_printk(KERN_ERR "schedule_work() failed in snd_card_free_in_thread for card %i\n", card->number);

	/* try to free the structure immediately */

	snd_card_free(card);

	return -EFAULT;

}



EXPORT_SYMBOL(snd_card_free_in_thread);



static void choose_default_id(struct snd_card *card)

{

	int i, len, idx_flag = 0, loops = SNDRV_CARDS;
@@ -742,9 +692,9 @@ EXPORT_SYMBOL(snd_card_file_add); 
 *

 *  This function removes the file formerly added to the card via

 *  snd_card_file_add() function.

 *  If all files are removed and the release of the card is

 *  scheduled, it will wake up the the thread to call snd_card_free()

 *  (see snd_card_free_in_thread() function).

 *  If all files are removed and snd_card_free_when_closed() was

 *  called beforehand, it processes the pending release of

 *  resources.

 *

 *  Returns zero or a negative error code.

 */

sound/drivers/mpu401/mpu401.c

+1 −1
Original line number Diff line number Diff line
@@ -211,7 +211,7 @@ static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev) 
	struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);



	snd_card_disconnect(card);

	snd_card_free_in_thread(card);

	snd_card_free_when_closed(card);

}



static struct pnp_driver snd_mpu401_pnp_driver = {

sound/pcmcia/pdaudiocf/pdaudiocf.c

+1 −1
Original line number Diff line number Diff line
@@ -206,7 +206,7 @@ static void snd_pdacf_detach(struct pcmcia_device *link) 
		snd_pdacf_powerdown(chip);

	chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */

	snd_card_disconnect(chip->card);

	snd_card_free_in_thread(chip->card);

	snd_card_free_when_closed(chip->card);

}



/*