51 	struct snd_card *card;  in snd_ctl_open()  local
59 	card = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_CONTROL);  in snd_ctl_open()
60 	if (!card) {  in snd_ctl_open()
64 	err = snd_card_file_add(card, file);  in snd_ctl_open()
69 	if (!try_module_get(card->module)) {  in snd_ctl_open()
81 	ctl->card = card;  in snd_ctl_open()
86 	write_lock_irqsave(&card->ctl_files_rwlock, flags);  in snd_ctl_open()
87 	list_add_tail(&ctl->list, &card->ctl_files);  in snd_ctl_open()
88 	write_unlock_irqrestore(&card->ctl_files_rwlock, flags);  in snd_ctl_open()
89 	snd_card_unref(card);  in snd_ctl_open()
93 	module_put(card->module);  in snd_ctl_open()
95 	snd_card_file_remove(card, file);  in snd_ctl_open()
97 	if (card)  in snd_ctl_open()
98 		snd_card_unref(card);  in snd_ctl_open()
119 	struct snd_card *card;  in snd_ctl_release()  local
126 	card = ctl->card;  in snd_ctl_release()
127 	write_lock_irqsave(&card->ctl_files_rwlock, flags);  in snd_ctl_release()
129 	write_unlock_irqrestore(&card->ctl_files_rwlock, flags);  in snd_ctl_release()
130 	down_write(&card->controls_rwsem);  in snd_ctl_release()
131 	list_for_each_entry(control, &card->controls, list)  in snd_ctl_release()
135 	up_write(&card->controls_rwsem);  in snd_ctl_release()
139 	module_put(card->module);  in snd_ctl_release()
140 	snd_card_file_remove(card, file);  in snd_ctl_release()
154 void snd_ctl_notify(struct snd_card *card, unsigned int mask,  in snd_ctl_notify()  argument
161 	if (snd_BUG_ON(!card || !id))  in snd_ctl_notify()
163 	read_lock(&card->ctl_files_rwlock);  in snd_ctl_notify()
165 	card->mixer_oss_change_count++;  in snd_ctl_notify()
167 	list_for_each_entry(ctl, &card->ctl_files, list) {  in snd_ctl_notify()
183 			dev_err(card->dev, "No memory available to allocate event\n");  in snd_ctl_notify()
190 	read_unlock(&card->ctl_files_rwlock);  in snd_ctl_notify()
314 static bool snd_ctl_remove_numid_conflict(struct snd_card *card,  in snd_ctl_remove_numid_conflict()  argument
320 	if (card->last_numid >= UINT_MAX - count)  in snd_ctl_remove_numid_conflict()
321 		card->last_numid = 0;  in snd_ctl_remove_numid_conflict()
323 	list_for_each_entry(kctl, &card->controls, list) {  in snd_ctl_remove_numid_conflict()
324 		if (kctl->id.numid < card->last_numid + 1 + count &&  in snd_ctl_remove_numid_conflict()
325 		    kctl->id.numid + kctl->count > card->last_numid + 1) {  in snd_ctl_remove_numid_conflict()
326 		    	card->last_numid = kctl->id.numid + kctl->count - 1;  in snd_ctl_remove_numid_conflict()
333 static int snd_ctl_find_hole(struct snd_card *card, unsigned int count)  in snd_ctl_find_hole()  argument
337 	while (snd_ctl_remove_numid_conflict(card, count)) {  in snd_ctl_find_hole()
340 			dev_err(card->dev, "unable to allocate new control numid\n");  in snd_ctl_find_hole()
361 int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)  in snd_ctl_add()  argument
370 	if (snd_BUG_ON(!card || !kcontrol->info))  in snd_ctl_add()
376 	down_write(&card->controls_rwsem);  in snd_ctl_add()
377 	if (snd_ctl_find_id(card, &id)) {  in snd_ctl_add()
378 		up_write(&card->controls_rwsem);  in snd_ctl_add()
379 		dev_err(card->dev, "control %i:%i:%i:%s:%i is already present\n",  in snd_ctl_add()
388 	if (snd_ctl_find_hole(card, kcontrol->count) < 0) {  in snd_ctl_add()
389 		up_write(&card->controls_rwsem);  in snd_ctl_add()
393 	list_add_tail(&kcontrol->list, &card->controls);  in snd_ctl_add()
394 	card->controls_count += kcontrol->count;  in snd_ctl_add()
395 	kcontrol->id.numid = card->last_numid + 1;  in snd_ctl_add()
396 	card->last_numid += kcontrol->count;  in snd_ctl_add()
399 	up_write(&card->controls_rwsem);  in snd_ctl_add()
401 		snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);  in snd_ctl_add()
424 int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol,  in snd_ctl_replace()  argument
435 	if (snd_BUG_ON(!card || !kcontrol->info)) {  in snd_ctl_replace()
440 	down_write(&card->controls_rwsem);  in snd_ctl_replace()
441 	old = snd_ctl_find_id(card, &id);  in snd_ctl_replace()
445 		up_write(&card->controls_rwsem);  in snd_ctl_replace()
449 	ret = snd_ctl_remove(card, old);  in snd_ctl_replace()
451 		up_write(&card->controls_rwsem);  in snd_ctl_replace()
455 	if (snd_ctl_find_hole(card, kcontrol->count) < 0) {  in snd_ctl_replace()
456 		up_write(&card->controls_rwsem);  in snd_ctl_replace()
460 	list_add_tail(&kcontrol->list, &card->controls);  in snd_ctl_replace()
461 	card->controls_count += kcontrol->count;  in snd_ctl_replace()
462 	kcontrol->id.numid = card->last_numid + 1;  in snd_ctl_replace()
463 	card->last_numid += kcontrol->count;  in snd_ctl_replace()
466 	up_write(&card->controls_rwsem);  in snd_ctl_replace()
468 		snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);  in snd_ctl_replace()
488 int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol)  in snd_ctl_remove()  argument
493 	if (snd_BUG_ON(!card || !kcontrol))  in snd_ctl_remove()
496 	card->controls_count -= kcontrol->count;  in snd_ctl_remove()
499 		snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_REMOVE, &id);  in snd_ctl_remove()
515 int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id)  in snd_ctl_remove_id()  argument
520 	down_write(&card->controls_rwsem);  in snd_ctl_remove_id()
521 	kctl = snd_ctl_find_id(card, id);  in snd_ctl_remove_id()
523 		up_write(&card->controls_rwsem);  in snd_ctl_remove_id()
526 	ret = snd_ctl_remove(card, kctl);  in snd_ctl_remove_id()
527 	up_write(&card->controls_rwsem);  in snd_ctl_remove_id()
545 	struct snd_card *card = file->card;  in snd_ctl_remove_user_ctl()  local
549 	down_write(&card->controls_rwsem);  in snd_ctl_remove_user_ctl()
550 	kctl = snd_ctl_find_id(card, id);  in snd_ctl_remove_user_ctl()
564 	ret = snd_ctl_remove(card, kctl);  in snd_ctl_remove_user_ctl()
567 	card->user_ctl_count--;  in snd_ctl_remove_user_ctl()
569 	up_write(&card->controls_rwsem);  in snd_ctl_remove_user_ctl()
585 int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,  in snd_ctl_activate_id()  argument
593 	down_write(&card->controls_rwsem);  in snd_ctl_activate_id()
594 	kctl = snd_ctl_find_id(card, id);  in snd_ctl_activate_id()
614 	up_write(&card->controls_rwsem);  in snd_ctl_activate_id()
616 		snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_INFO, id);  in snd_ctl_activate_id()
632 int snd_ctl_rename_id(struct snd_card *card, struct snd_ctl_elem_id *src_id,  in snd_ctl_rename_id()  argument
637 	down_write(&card->controls_rwsem);  in snd_ctl_rename_id()
638 	kctl = snd_ctl_find_id(card, src_id);  in snd_ctl_rename_id()
640 		up_write(&card->controls_rwsem);  in snd_ctl_rename_id()
644 	kctl->id.numid = card->last_numid + 1;  in snd_ctl_rename_id()
645 	card->last_numid += kctl->count;  in snd_ctl_rename_id()
646 	up_write(&card->controls_rwsem);  in snd_ctl_rename_id()
664 struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid)  in snd_ctl_find_numid()  argument
668 	if (snd_BUG_ON(!card || !numid))  in snd_ctl_find_numid()
670 	list_for_each_entry(kctl, &card->controls, list) {  in snd_ctl_find_numid()
691 struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,  in snd_ctl_find_id()  argument
696 	if (snd_BUG_ON(!card || !id))  in snd_ctl_find_id()
699 		return snd_ctl_find_numid(card, id->numid);  in snd_ctl_find_id()
700 	list_for_each_entry(kctl, &card->controls, list) {  in snd_ctl_find_id()
719 static int snd_ctl_card_info(struct snd_card *card, struct snd_ctl_file * ctl,  in snd_ctl_card_info()  argument
728 	info->card = card->number;  in snd_ctl_card_info()
729 	strlcpy(info->id, card->id, sizeof(info->id));  in snd_ctl_card_info()
730 	strlcpy(info->driver, card->driver, sizeof(info->driver));  in snd_ctl_card_info()
731 	strlcpy(info->name, card->shortname, sizeof(info->name));  in snd_ctl_card_info()
732 	strlcpy(info->longname, card->longname, sizeof(info->longname));  in snd_ctl_card_info()
733 	strlcpy(info->mixername, card->mixername, sizeof(info->mixername));  in snd_ctl_card_info()
734 	strlcpy(info->components, card->components, sizeof(info->components));  in snd_ctl_card_info()
744 static int snd_ctl_elem_list(struct snd_card *card,  in snd_ctl_elem_list()  argument
765 		down_read(&card->controls_rwsem);  in snd_ctl_elem_list()
766 		list.count = card->controls_count;  in snd_ctl_elem_list()
767 		plist = card->controls.next;  in snd_ctl_elem_list()
768 		while (plist != &card->controls) {  in snd_ctl_elem_list()
779 		while (space > 0 && plist != &card->controls) {  in snd_ctl_elem_list()
790 		up_read(&card->controls_rwsem);  in snd_ctl_elem_list()
799 		down_read(&card->controls_rwsem);  in snd_ctl_elem_list()
800 		list.count = card->controls_count;  in snd_ctl_elem_list()
801 		up_read(&card->controls_rwsem);  in snd_ctl_elem_list()
811 	struct snd_card *card = ctl->card;  in snd_ctl_elem_info()  local
817 	down_read(&card->controls_rwsem);  in snd_ctl_elem_info()
818 	kctl = snd_ctl_find_id(card, &info->id);  in snd_ctl_elem_info()
820 		up_read(&card->controls_rwsem);  in snd_ctl_elem_info()
842 	up_read(&card->controls_rwsem);  in snd_ctl_elem_info()
854 	snd_power_lock(ctl->card);  in snd_ctl_elem_info_user()
855 	result = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);  in snd_ctl_elem_info_user()
858 	snd_power_unlock(ctl->card);  in snd_ctl_elem_info_user()
865 static int snd_ctl_elem_read(struct snd_card *card,  in snd_ctl_elem_read()  argument
873 	down_read(&card->controls_rwsem);  in snd_ctl_elem_read()
874 	kctl = snd_ctl_find_id(card, &control->id);  in snd_ctl_elem_read()
887 	up_read(&card->controls_rwsem);  in snd_ctl_elem_read()
891 static int snd_ctl_elem_read_user(struct snd_card *card,  in snd_ctl_elem_read_user()  argument
901 	snd_power_lock(card);  in snd_ctl_elem_read_user()
902 	result = snd_power_wait(card, SNDRV_CTL_POWER_D0);  in snd_ctl_elem_read_user()
904 		result = snd_ctl_elem_read(card, control);  in snd_ctl_elem_read_user()
905 	snd_power_unlock(card);  in snd_ctl_elem_read_user()
913 static int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file,  in snd_ctl_elem_write()  argument
921 	down_read(&card->controls_rwsem);  in snd_ctl_elem_write()
922 	kctl = snd_ctl_find_id(card, &control->id);  in snd_ctl_elem_write()
938 			up_read(&card->controls_rwsem);  in snd_ctl_elem_write()
939 			snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &id);  in snd_ctl_elem_write()
943 	up_read(&card->controls_rwsem);  in snd_ctl_elem_write()
951 	struct snd_card *card;  in snd_ctl_elem_write_user()  local
958 	card = file->card;  in snd_ctl_elem_write_user()
959 	snd_power_lock(card);  in snd_ctl_elem_write_user()
960 	result = snd_power_wait(card, SNDRV_CTL_POWER_D0);  in snd_ctl_elem_write_user()
962 		result = snd_ctl_elem_write(card, file, control);  in snd_ctl_elem_write_user()
963 	snd_power_unlock(card);  in snd_ctl_elem_write_user()
974 	struct snd_card *card = file->card;  in snd_ctl_elem_lock()  local
982 	down_write(&card->controls_rwsem);  in snd_ctl_elem_lock()
983 	kctl = snd_ctl_find_id(card, &id);  in snd_ctl_elem_lock()
995 	up_write(&card->controls_rwsem);  in snd_ctl_elem_lock()
1002 	struct snd_card *card = file->card;  in snd_ctl_elem_unlock()  local
1010 	down_write(&card->controls_rwsem);  in snd_ctl_elem_unlock()
1011 	kctl = snd_ctl_find_id(card, &id);  in snd_ctl_elem_unlock()
1025 	up_write(&card->controls_rwsem);  in snd_ctl_elem_unlock()
1031 	struct snd_card *card;  member
1085 	mutex_lock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_get()
1087 	mutex_unlock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_get()
1100 	mutex_lock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_put()
1104 	mutex_unlock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_put()
1124 		mutex_lock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_tlv()
1131 		mutex_unlock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_tlv()
1135 		mutex_lock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_tlv()
1147 		mutex_unlock(&ue->card->user_ctl_lock);  in snd_ctl_elem_user_tlv()
1217 	struct snd_card *card = file->card;  in snd_ctl_elem_add()  local
1243 	if (card->user_ctl_count + 1 > MAX_USER_CONTROLS)  in snd_ctl_elem_add()
1297 	ue->card = card;  in snd_ctl_elem_add()
1323 	err = snd_ctl_add(card, kctl);  in snd_ctl_elem_add()
1336 	down_write(&card->controls_rwsem);  in snd_ctl_elem_add()
1337 	card->user_ctl_count++;  in snd_ctl_elem_add()
1338 	up_write(&card->controls_rwsem);  in snd_ctl_elem_add()
1397 	struct snd_card *card = file->card;  in snd_ctl_tlv_ioctl()  local
1410 	down_read(&card->controls_rwsem);  in snd_ctl_tlv_ioctl()
1411 	kctl = snd_ctl_find_numid(card, tlv.numid);  in snd_ctl_tlv_ioctl()
1438 			up_read(&card->controls_rwsem);  in snd_ctl_tlv_ioctl()
1439 			snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_TLV, &id);  in snd_ctl_tlv_ioctl()
1456 	up_read(&card->controls_rwsem);  in snd_ctl_tlv_ioctl()
1463 	struct snd_card *card;  in snd_ctl_ioctl()  local
1470 	card = ctl->card;  in snd_ctl_ioctl()
1471 	if (snd_BUG_ON(!card))  in snd_ctl_ioctl()
1477 		return snd_ctl_card_info(card, ctl, cmd, argp);  in snd_ctl_ioctl()
1479 		return snd_ctl_elem_list(card, argp);  in snd_ctl_ioctl()
1483 		return snd_ctl_elem_read_user(card, argp);  in snd_ctl_ioctl()
1508 		return put_user(card->power_state, ip) ? -EFAULT : 0;  in snd_ctl_ioctl()
1515 		err = p->fioctl(card, ctl, cmd, arg);  in snd_ctl_ioctl()
1522 	dev_dbg(card->dev, "unknown ioctl = 0x%x\n", cmd);  in snd_ctl_ioctl()
1534 	if (snd_BUG_ON(!ctl || !ctl->card))  in snd_ctl_read()
1556 			if (ctl->card->shutdown)  in snd_ctl_read()
1702 int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type)  in snd_ctl_get_preferred_subdevice()  argument
1707 	read_lock(&card->ctl_files_rwlock);  in snd_ctl_get_preferred_subdevice()
1708 	list_for_each_entry(kctl, &card->ctl_files, list) {  in snd_ctl_get_preferred_subdevice()
1715 	read_unlock(&card->ctl_files_rwlock);  in snd_ctl_get_preferred_subdevice()
1751 	struct snd_card *card = device->device_data;  in snd_ctl_dev_register()  local
1753 	return snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,  in snd_ctl_dev_register()
1754 				   &snd_ctl_f_ops, card, &card->ctl_dev);  in snd_ctl_dev_register()
1762 	struct snd_card *card = device->device_data;  in snd_ctl_dev_disconnect()  local
1765 	read_lock(&card->ctl_files_rwlock);  in snd_ctl_dev_disconnect()
1766 	list_for_each_entry(ctl, &card->ctl_files, list) {  in snd_ctl_dev_disconnect()
1770 	read_unlock(&card->ctl_files_rwlock);  in snd_ctl_dev_disconnect()
1772 	return snd_unregister_device(&card->ctl_dev);  in snd_ctl_dev_disconnect()
1780 	struct snd_card *card = device->device_data;  in snd_ctl_dev_free()  local
1783 	down_write(&card->controls_rwsem);  in snd_ctl_dev_free()
1784 	while (!list_empty(&card->controls)) {  in snd_ctl_dev_free()
1785 		control = snd_kcontrol(card->controls.next);  in snd_ctl_dev_free()
1786 		snd_ctl_remove(card, control);  in snd_ctl_dev_free()
1788 	up_write(&card->controls_rwsem);  in snd_ctl_dev_free()
1789 	put_device(&card->ctl_dev);  in snd_ctl_dev_free()
1797 int snd_ctl_create(struct snd_card *card)  in snd_ctl_create()  argument
1806 	if (snd_BUG_ON(!card))  in snd_ctl_create()
1808 	if (snd_BUG_ON(card->number < 0 || card->number >= SNDRV_CARDS))  in snd_ctl_create()
1811 	snd_device_initialize(&card->ctl_dev, card);  in snd_ctl_create()
1812 	dev_set_name(&card->ctl_dev, "controlC%d", card->number);  in snd_ctl_create()
1814 	err = snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);  in snd_ctl_create()
1816 		put_device(&card->ctl_dev);  in snd_ctl_create()