2 * Initialization routines
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/init.h>
23 #include <linux/sched.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/ctype.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
34 /* monitor files for graceful shutdown (hotplug) */
35 struct snd_monitor_file
{
37 const struct file_operations
*disconnected_f_op
;
38 struct list_head shutdown_list
; /* still need to shutdown */
39 struct list_head list
; /* link of monitor files */
42 static DEFINE_SPINLOCK(shutdown_lock
);
43 static LIST_HEAD(shutdown_files
);
45 static const struct file_operations snd_shutdown_f_ops
;
47 static unsigned int snd_cards_lock
; /* locked for registering/using */
48 struct snd_card
*snd_cards
[SNDRV_CARDS
];
49 EXPORT_SYMBOL(snd_cards
);
51 static DEFINE_MUTEX(snd_card_mutex
);
53 static char *slots
[SNDRV_CARDS
];
54 module_param_array(slots
, charp
, NULL
, 0444);
55 MODULE_PARM_DESC(slots
, "Module names assigned to the slots.");
57 /* return non-zero if the given index is reserved for the given
58 * module via slots option
60 static int module_slot_match(struct module
*module
, int idx
)
66 if (!module
|| !module
->name
|| !slots
[idx
])
72 match
= 0; /* negative match */
75 /* compare module name strings
76 * hyphens are handled as equivalent with underscore
94 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
95 int (*snd_mixer_oss_notify_callback
)(struct snd_card
*card
, int free_flag
);
96 EXPORT_SYMBOL(snd_mixer_oss_notify_callback
);
100 static void snd_card_id_read(struct snd_info_entry
*entry
,
101 struct snd_info_buffer
*buffer
)
103 snd_iprintf(buffer
, "%s\n", entry
->card
->id
);
106 static inline int init_info_for_card(struct snd_card
*card
)
109 struct snd_info_entry
*entry
;
111 if ((err
= snd_info_card_register(card
)) < 0) {
112 snd_printd("unable to create card info\n");
115 if ((entry
= snd_info_create_card_entry(card
, "id", card
->proc_root
)) == NULL
) {
116 snd_printd("unable to create card entry\n");
119 entry
->c
.text
.read
= snd_card_id_read
;
120 if (snd_info_register(entry
) < 0) {
121 snd_info_free_entry(entry
);
124 card
->proc_id
= entry
;
127 #else /* !CONFIG_PROC_FS */
128 #define init_info_for_card(card)
132 * snd_card_create - create and initialize a soundcard structure
133 * @idx: card index (address) [0 ... (SNDRV_CARDS-1)]
134 * @xid: card identification (ASCII string)
135 * @module: top level module for locking
136 * @extra_size: allocate this extra size after the main soundcard structure
137 * @card_ret: the pointer to store the created card instance
139 * Creates and initializes a soundcard structure.
141 * The function allocates snd_card instance via kzalloc with the given
142 * space for the driver to use freely. The allocated struct is stored
143 * in the given card_ret pointer.
145 * Returns zero if successful or a negative error code.
147 int snd_card_create(int idx
, const char *xid
,
148 struct module
*module
, int extra_size
,
149 struct snd_card
**card_ret
)
151 struct snd_card
*card
;
154 if (snd_BUG_ON(!card_ret
))
160 card
= kzalloc(sizeof(*card
) + extra_size
, GFP_KERNEL
);
164 strlcpy(card
->id
, xid
, sizeof(card
->id
));
166 mutex_lock(&snd_card_mutex
);
168 for (idx2
= 0; idx2
< SNDRV_CARDS
; idx2
++)
169 /* idx == -1 == 0xffff means: take any free slot */
170 if (~snd_cards_lock
& idx
& 1<<idx2
) {
171 if (module_slot_match(module
, idx2
)) {
178 for (idx2
= 0; idx2
< SNDRV_CARDS
; idx2
++)
179 /* idx == -1 == 0xffff means: take any free slot */
180 if (~snd_cards_lock
& idx
& 1<<idx2
) {
181 if (!slots
[idx2
] || !*slots
[idx2
]) {
189 else if (idx
< snd_ecards_limit
) {
190 if (snd_cards_lock
& (1 << idx
))
191 err
= -EBUSY
; /* invalid */
192 } else if (idx
>= SNDRV_CARDS
)
195 mutex_unlock(&snd_card_mutex
);
196 snd_printk(KERN_ERR
"cannot find the slot for index %d (range 0-%i), error: %d\n",
197 idx
, snd_ecards_limit
- 1, err
);
200 snd_cards_lock
|= 1 << idx
; /* lock it */
201 if (idx
>= snd_ecards_limit
)
202 snd_ecards_limit
= idx
+ 1; /* increase the limit */
203 mutex_unlock(&snd_card_mutex
);
205 card
->module
= module
;
206 INIT_LIST_HEAD(&card
->devices
);
207 init_rwsem(&card
->controls_rwsem
);
208 rwlock_init(&card
->ctl_files_rwlock
);
209 INIT_LIST_HEAD(&card
->controls
);
210 INIT_LIST_HEAD(&card
->ctl_files
);
211 spin_lock_init(&card
->files_lock
);
212 INIT_LIST_HEAD(&card
->files_list
);
213 init_waitqueue_head(&card
->shutdown_sleep
);
215 mutex_init(&card
->power_lock
);
216 init_waitqueue_head(&card
->power_sleep
);
218 /* the control interface cannot be accessed from the user space until */
219 /* snd_cards_bitmask and snd_cards are set with snd_card_register */
220 err
= snd_ctl_create(card
);
222 snd_printk(KERN_ERR
"unable to register control minors\n");
225 err
= snd_info_card_create(card
);
227 snd_printk(KERN_ERR
"unable to create card info\n");
231 card
->private_data
= (char *)card
+ sizeof(struct snd_card
);
236 snd_device_free_all(card
, SNDRV_DEV_CMD_PRE
);
241 EXPORT_SYMBOL(snd_card_create
);
243 /* return non-zero if a card is already locked */
244 int snd_card_locked(int card
)
248 mutex_lock(&snd_card_mutex
);
249 locked
= snd_cards_lock
& (1 << card
);
250 mutex_unlock(&snd_card_mutex
);
254 static loff_t
snd_disconnect_llseek(struct file
*file
, loff_t offset
, int orig
)
259 static ssize_t
snd_disconnect_read(struct file
*file
, char __user
*buf
,
260 size_t count
, loff_t
*offset
)
265 static ssize_t
snd_disconnect_write(struct file
*file
, const char __user
*buf
,
266 size_t count
, loff_t
*offset
)
271 static int snd_disconnect_release(struct inode
*inode
, struct file
*file
)
273 struct snd_monitor_file
*df
= NULL
, *_df
;
275 spin_lock(&shutdown_lock
);
276 list_for_each_entry(_df
, &shutdown_files
, shutdown_list
) {
277 if (_df
->file
== file
) {
279 list_del_init(&df
->shutdown_list
);
283 spin_unlock(&shutdown_lock
);
286 if ((file
->f_flags
& FASYNC
) && df
->disconnected_f_op
->fasync
)
287 df
->disconnected_f_op
->fasync(-1, file
, 0);
288 return df
->disconnected_f_op
->release(inode
, file
);
291 panic("%s(%p, %p) failed!", __func__
, inode
, file
);
294 static unsigned int snd_disconnect_poll(struct file
* file
, poll_table
* wait
)
296 return POLLERR
| POLLNVAL
;
299 static long snd_disconnect_ioctl(struct file
*file
,
300 unsigned int cmd
, unsigned long arg
)
305 static int snd_disconnect_mmap(struct file
*file
, struct vm_area_struct
*vma
)
310 static int snd_disconnect_fasync(int fd
, struct file
*file
, int on
)
315 static const struct file_operations snd_shutdown_f_ops
=
317 .owner
= THIS_MODULE
,
318 .llseek
= snd_disconnect_llseek
,
319 .read
= snd_disconnect_read
,
320 .write
= snd_disconnect_write
,
321 .release
= snd_disconnect_release
,
322 .poll
= snd_disconnect_poll
,
323 .unlocked_ioctl
= snd_disconnect_ioctl
,
325 .compat_ioctl
= snd_disconnect_ioctl
,
327 .mmap
= snd_disconnect_mmap
,
328 .fasync
= snd_disconnect_fasync
332 * snd_card_disconnect - disconnect all APIs from the file-operations (user space)
333 * @card: soundcard structure
335 * Disconnects all APIs from the file-operations (user space).
337 * Returns zero, otherwise a negative error code.
339 * Note: The current implementation replaces all active file->f_op with special
340 * dummy file operations (they do nothing except release).
342 int snd_card_disconnect(struct snd_card
*card
)
344 struct snd_monitor_file
*mfile
;
351 spin_lock(&card
->files_lock
);
352 if (card
->shutdown
) {
353 spin_unlock(&card
->files_lock
);
357 spin_unlock(&card
->files_lock
);
359 /* phase 1: disable fops (user space) operations for ALSA API */
360 mutex_lock(&snd_card_mutex
);
361 snd_cards
[card
->number
] = NULL
;
362 snd_cards_lock
&= ~(1 << card
->number
);
363 mutex_unlock(&snd_card_mutex
);
365 /* phase 2: replace file->f_op with special dummy operations */
367 spin_lock(&card
->files_lock
);
368 list_for_each_entry(mfile
, &card
->files_list
, list
) {
371 /* it's critical part, use endless loop */
372 /* we have no room to fail */
373 mfile
->disconnected_f_op
= mfile
->file
->f_op
;
375 spin_lock(&shutdown_lock
);
376 list_add(&mfile
->shutdown_list
, &shutdown_files
);
377 spin_unlock(&shutdown_lock
);
379 mfile
->file
->f_op
= &snd_shutdown_f_ops
;
380 fops_get(mfile
->file
->f_op
);
382 spin_unlock(&card
->files_lock
);
384 /* phase 3: notify all connected devices about disconnection */
385 /* at this point, they cannot respond to any calls except release() */
387 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
388 if (snd_mixer_oss_notify_callback
)
389 snd_mixer_oss_notify_callback(card
, SND_MIXER_OSS_NOTIFY_DISCONNECT
);
392 /* notify all devices that we are disconnected */
393 err
= snd_device_disconnect_all(card
);
395 snd_printk(KERN_ERR
"not all devices for card %i can be disconnected\n", card
->number
);
397 snd_info_card_disconnect(card
);
398 #ifndef CONFIG_SYSFS_DEPRECATED
399 if (card
->card_dev
) {
400 device_unregister(card
->card_dev
);
401 card
->card_dev
= NULL
;
405 wake_up(&card
->power_sleep
);
410 EXPORT_SYMBOL(snd_card_disconnect
);
413 * snd_card_free - frees given soundcard structure
414 * @card: soundcard structure
416 * This function releases the soundcard structure and the all assigned
417 * devices automatically. That is, you don't have to release the devices
420 * Returns zero. Frees all associated devices and frees the control
421 * interface associated to given soundcard.
423 static int snd_card_do_free(struct snd_card
*card
)
425 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
426 if (snd_mixer_oss_notify_callback
)
427 snd_mixer_oss_notify_callback(card
, SND_MIXER_OSS_NOTIFY_FREE
);
429 if (snd_device_free_all(card
, SNDRV_DEV_CMD_PRE
) < 0) {
430 snd_printk(KERN_ERR
"unable to free all devices (pre)\n");
431 /* Fatal, but this situation should never occur */
433 if (snd_device_free_all(card
, SNDRV_DEV_CMD_NORMAL
) < 0) {
434 snd_printk(KERN_ERR
"unable to free all devices (normal)\n");
435 /* Fatal, but this situation should never occur */
437 if (snd_device_free_all(card
, SNDRV_DEV_CMD_POST
) < 0) {
438 snd_printk(KERN_ERR
"unable to free all devices (post)\n");
439 /* Fatal, but this situation should never occur */
441 if (card
->private_free
)
442 card
->private_free(card
);
443 snd_info_free_entry(card
->proc_id
);
444 if (snd_info_card_free(card
) < 0) {
445 snd_printk(KERN_WARNING
"unable to free card info\n");
446 /* Not fatal error */
452 int snd_card_free_when_closed(struct snd_card
*card
)
455 int ret
= snd_card_disconnect(card
);
459 spin_lock(&card
->files_lock
);
460 if (list_empty(&card
->files_list
))
463 card
->free_on_last_close
= 1;
464 spin_unlock(&card
->files_lock
);
467 snd_card_do_free(card
);
471 EXPORT_SYMBOL(snd_card_free_when_closed
);
473 int snd_card_free(struct snd_card
*card
)
475 int ret
= snd_card_disconnect(card
);
479 /* wait, until all devices are ready for the free operation */
480 wait_event(card
->shutdown_sleep
, list_empty(&card
->files_list
));
481 snd_card_do_free(card
);
485 EXPORT_SYMBOL(snd_card_free
);
487 static void snd_card_set_id_no_lock(struct snd_card
*card
, const char *nid
)
489 int i
, len
, idx_flag
= 0, loops
= SNDRV_CARDS
;
490 const char *spos
, *src
;
494 id
= card
->shortname
;
496 while (*id
!= '\0') {
505 while (*spos
!= '\0' && !isalnum(*spos
))
508 *id
++ = isalpha(src
[0]) ? src
[0] : 'D';
509 while (*spos
!= '\0' && (size_t)(id
- card
->id
) < sizeof(card
->id
) - 1) {
519 strcpy(id
, "default");
523 snd_printk(KERN_ERR
"unable to set card id (%s)\n", id
);
524 strcpy(card
->id
, card
->proc_root
->name
);
527 if (!snd_info_check_reserved_words(id
))
529 for (i
= 0; i
< snd_ecards_limit
; i
++) {
530 if (snd_cards
[i
] && !strcmp(snd_cards
[i
]->id
, id
))
538 if (id
[len
-1] != '9')
542 } else if ((size_t)len
<= sizeof(card
->id
) - 3) {
547 if ((size_t)len
<= sizeof(card
->id
) - 2)
549 *(char *)spos
++ = '_';
550 *(char *)spos
++ = '1';
551 *(char *)spos
++ = '\0';
558 * snd_card_set_id - set card identification name
559 * @card: soundcard structure
560 * @nid: new identification string
562 * This function sets the card identification and checks for name
565 void snd_card_set_id(struct snd_card
*card
, const char *nid
)
567 /* check if user specified own card->id */
568 if (card
->id
[0] != '\0')
570 mutex_lock(&snd_card_mutex
);
571 snd_card_set_id_no_lock(card
, nid
);
572 mutex_unlock(&snd_card_mutex
);
574 EXPORT_SYMBOL(snd_card_set_id
);
576 #ifndef CONFIG_SYSFS_DEPRECATED
578 card_id_show_attr(struct device
*dev
,
579 struct device_attribute
*attr
, char *buf
)
581 struct snd_card
*card
= dev_get_drvdata(dev
);
582 return snprintf(buf
, PAGE_SIZE
, "%s\n", card
? card
->id
: "(null)");
586 card_id_store_attr(struct device
*dev
, struct device_attribute
*attr
,
587 const char *buf
, size_t count
)
589 struct snd_card
*card
= dev_get_drvdata(dev
);
590 char buf1
[sizeof(card
->id
)];
591 size_t copy
= count
> sizeof(card
->id
) - 1 ?
592 sizeof(card
->id
) - 1 : count
;
596 for (idx
= 0; idx
< copy
; idx
++) {
598 if (!isalnum(c
) && c
!= '_' && c
!= '-')
601 memcpy(buf1
, buf
, copy
);
603 mutex_lock(&snd_card_mutex
);
604 if (!snd_info_check_reserved_words(buf1
)) {
606 mutex_unlock(&snd_card_mutex
);
609 for (idx
= 0; idx
< snd_ecards_limit
; idx
++) {
610 if (snd_cards
[idx
] && !strcmp(snd_cards
[idx
]->id
, buf1
)) {
611 if (card
== snd_cards
[idx
])
617 strcpy(card
->id
, buf1
);
618 snd_info_card_id_change(card
);
620 mutex_unlock(&snd_card_mutex
);
625 static struct device_attribute card_id_attrs
=
626 __ATTR(id
, S_IRUGO
| S_IWUSR
, card_id_show_attr
, card_id_store_attr
);
629 card_number_show_attr(struct device
*dev
,
630 struct device_attribute
*attr
, char *buf
)
632 struct snd_card
*card
= dev_get_drvdata(dev
);
633 return snprintf(buf
, PAGE_SIZE
, "%i\n", card
? card
->number
: -1);
636 static struct device_attribute card_number_attrs
=
637 __ATTR(number
, S_IRUGO
, card_number_show_attr
, NULL
);
638 #endif /* CONFIG_SYSFS_DEPRECATED */
641 * snd_card_register - register the soundcard
642 * @card: soundcard structure
644 * This function registers all the devices assigned to the soundcard.
645 * Until calling this, the ALSA control interface is blocked from the
646 * external accesses. Thus, you should call this function at the end
647 * of the initialization of the card.
649 * Returns zero otherwise a negative error code if the registrain failed.
651 int snd_card_register(struct snd_card
*card
)
655 if (snd_BUG_ON(!card
))
657 #ifndef CONFIG_SYSFS_DEPRECATED
658 if (!card
->card_dev
) {
659 card
->card_dev
= device_create(sound_class
, card
->dev
,
661 "card%i", card
->number
);
662 if (IS_ERR(card
->card_dev
))
663 card
->card_dev
= NULL
;
666 if ((err
= snd_device_register_all(card
)) < 0)
668 mutex_lock(&snd_card_mutex
);
669 if (snd_cards
[card
->number
]) {
670 /* already registered */
671 mutex_unlock(&snd_card_mutex
);
674 snd_card_set_id_no_lock(card
, card
->id
[0] == '\0' ? NULL
: card
->id
);
675 snd_cards
[card
->number
] = card
;
676 mutex_unlock(&snd_card_mutex
);
677 init_info_for_card(card
);
678 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
679 if (snd_mixer_oss_notify_callback
)
680 snd_mixer_oss_notify_callback(card
, SND_MIXER_OSS_NOTIFY_REGISTER
);
682 #ifndef CONFIG_SYSFS_DEPRECATED
683 if (card
->card_dev
) {
684 err
= device_create_file(card
->card_dev
, &card_id_attrs
);
687 err
= device_create_file(card
->card_dev
, &card_number_attrs
);
695 EXPORT_SYMBOL(snd_card_register
);
697 #ifdef CONFIG_PROC_FS
698 static struct snd_info_entry
*snd_card_info_entry
;
700 static void snd_card_info_read(struct snd_info_entry
*entry
,
701 struct snd_info_buffer
*buffer
)
704 struct snd_card
*card
;
706 for (idx
= count
= 0; idx
< SNDRV_CARDS
; idx
++) {
707 mutex_lock(&snd_card_mutex
);
708 if ((card
= snd_cards
[idx
]) != NULL
) {
710 snd_iprintf(buffer
, "%2i [%-15s]: %s - %s\n",
715 snd_iprintf(buffer
, " %s\n",
718 mutex_unlock(&snd_card_mutex
);
721 snd_iprintf(buffer
, "--- no soundcards ---\n");
724 #ifdef CONFIG_SND_OSSEMUL
726 void snd_card_info_read_oss(struct snd_info_buffer
*buffer
)
729 struct snd_card
*card
;
731 for (idx
= count
= 0; idx
< SNDRV_CARDS
; idx
++) {
732 mutex_lock(&snd_card_mutex
);
733 if ((card
= snd_cards
[idx
]) != NULL
) {
735 snd_iprintf(buffer
, "%s\n", card
->longname
);
737 mutex_unlock(&snd_card_mutex
);
740 snd_iprintf(buffer
, "--- no soundcards ---\n");
747 static struct snd_info_entry
*snd_card_module_info_entry
;
748 static void snd_card_module_info_read(struct snd_info_entry
*entry
,
749 struct snd_info_buffer
*buffer
)
752 struct snd_card
*card
;
754 for (idx
= 0; idx
< SNDRV_CARDS
; idx
++) {
755 mutex_lock(&snd_card_mutex
);
756 if ((card
= snd_cards
[idx
]) != NULL
)
757 snd_iprintf(buffer
, "%2i %s\n",
758 idx
, card
->module
->name
);
759 mutex_unlock(&snd_card_mutex
);
764 int __init
snd_card_info_init(void)
766 struct snd_info_entry
*entry
;
768 entry
= snd_info_create_module_entry(THIS_MODULE
, "cards", NULL
);
771 entry
->c
.text
.read
= snd_card_info_read
;
772 if (snd_info_register(entry
) < 0) {
773 snd_info_free_entry(entry
);
776 snd_card_info_entry
= entry
;
779 entry
= snd_info_create_module_entry(THIS_MODULE
, "modules", NULL
);
781 entry
->c
.text
.read
= snd_card_module_info_read
;
782 if (snd_info_register(entry
) < 0)
783 snd_info_free_entry(entry
);
785 snd_card_module_info_entry
= entry
;
792 int __exit
snd_card_info_done(void)
794 snd_info_free_entry(snd_card_info_entry
);
796 snd_info_free_entry(snd_card_module_info_entry
);
801 #endif /* CONFIG_PROC_FS */
804 * snd_component_add - add a component string
805 * @card: soundcard structure
806 * @component: the component id string
808 * This function adds the component id string to the supported list.
809 * The component can be referred from the alsa-lib.
811 * Returns zero otherwise a negative error code.
814 int snd_component_add(struct snd_card
*card
, const char *component
)
817 int len
= strlen(component
);
819 ptr
= strstr(card
->components
, component
);
821 if (ptr
[len
] == '\0' || ptr
[len
] == ' ') /* already there */
824 if (strlen(card
->components
) + 1 + len
+ 1 > sizeof(card
->components
)) {
828 if (card
->components
[0] != '\0')
829 strcat(card
->components
, " ");
830 strcat(card
->components
, component
);
834 EXPORT_SYMBOL(snd_component_add
);
837 * snd_card_file_add - add the file to the file list of the card
838 * @card: soundcard structure
839 * @file: file pointer
841 * This function adds the file to the file linked-list of the card.
842 * This linked-list is used to keep tracking the connection state,
843 * and to avoid the release of busy resources by hotplug.
845 * Returns zero or a negative error code.
847 int snd_card_file_add(struct snd_card
*card
, struct file
*file
)
849 struct snd_monitor_file
*mfile
;
851 mfile
= kmalloc(sizeof(*mfile
), GFP_KERNEL
);
855 mfile
->disconnected_f_op
= NULL
;
856 spin_lock(&card
->files_lock
);
857 if (card
->shutdown
) {
858 spin_unlock(&card
->files_lock
);
862 list_add(&mfile
->list
, &card
->files_list
);
863 spin_unlock(&card
->files_lock
);
867 EXPORT_SYMBOL(snd_card_file_add
);
870 * snd_card_file_remove - remove the file from the file list
871 * @card: soundcard structure
872 * @file: file pointer
874 * This function removes the file formerly added to the card via
875 * snd_card_file_add() function.
876 * If all files are removed and snd_card_free_when_closed() was
877 * called beforehand, it processes the pending release of
880 * Returns zero or a negative error code.
882 int snd_card_file_remove(struct snd_card
*card
, struct file
*file
)
884 struct snd_monitor_file
*mfile
, *found
= NULL
;
887 spin_lock(&card
->files_lock
);
888 list_for_each_entry(mfile
, &card
->files_list
, list
) {
889 if (mfile
->file
== file
) {
890 list_del(&mfile
->list
);
891 if (mfile
->disconnected_f_op
)
892 fops_put(mfile
->disconnected_f_op
);
897 if (list_empty(&card
->files_list
))
899 spin_unlock(&card
->files_lock
);
901 wake_up(&card
->shutdown_sleep
);
902 if (card
->free_on_last_close
)
903 snd_card_do_free(card
);
906 snd_printk(KERN_ERR
"ALSA card file remove problem (%p)\n", file
);
913 EXPORT_SYMBOL(snd_card_file_remove
);
917 * snd_power_wait - wait until the power-state is changed.
918 * @card: soundcard structure
919 * @power_state: expected power state
921 * Waits until the power-state is changed.
923 * Note: the power lock must be active before call.
925 int snd_power_wait(struct snd_card
*card
, unsigned int power_state
)
931 if (snd_power_get_state(card
) == power_state
)
933 init_waitqueue_entry(&wait
, current
);
934 add_wait_queue(&card
->power_sleep
, &wait
);
936 if (card
->shutdown
) {
940 if (snd_power_get_state(card
) == power_state
)
942 set_current_state(TASK_UNINTERRUPTIBLE
);
943 snd_power_unlock(card
);
944 schedule_timeout(30 * HZ
);
945 snd_power_lock(card
);
947 remove_wait_queue(&card
->power_sleep
, &wait
);
951 EXPORT_SYMBOL(snd_power_wait
);
952 #endif /* CONFIG_PM */