read_unlock(&card->ctl_files_rwlock);
}
+EXPORT_SYMBOL(snd_ctl_notify);
+
/**
* snd_ctl_new - create a control instance from the template
* @control: the control template
return kctl;
}
+EXPORT_SYMBOL(snd_ctl_new);
+
/**
* snd_ctl_new1 - create a control instance from the template
* @ncontrol: the initialization record
return snd_ctl_new(&kctl, access);
}
+EXPORT_SYMBOL(snd_ctl_new1);
+
/**
* snd_ctl_free_one - release the control instance
* @kcontrol: the control instance
}
}
+EXPORT_SYMBOL(snd_ctl_free_one);
+
static unsigned int snd_ctl_hole_check(struct snd_card *card,
unsigned int count)
{
{
struct snd_ctl_elem_id id;
unsigned int idx;
+ int err = -EINVAL;
- snd_assert(card != NULL, return -EINVAL);
if (! kcontrol)
- return -EINVAL;
- snd_assert(kcontrol->info != NULL, return -EINVAL);
+ return err;
+ snd_assert(card != NULL, goto error);
+ snd_assert(kcontrol->info != NULL, goto error);
id = kcontrol->id;
down_write(&card->controls_rwsem);
if (snd_ctl_find_id(card, &id)) {
up_write(&card->controls_rwsem);
- snd_ctl_free_one(kcontrol);
snd_printd(KERN_ERR "control %i:%i:%i:%s:%i is already present\n",
id.iface,
id.device,
id.subdevice,
id.name,
id.index);
- return -EBUSY;
+ err = -EBUSY;
+ goto error;
}
if (snd_ctl_find_hole(card, kcontrol->count) < 0) {
up_write(&card->controls_rwsem);
- snd_ctl_free_one(kcontrol);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto error;
}
list_add_tail(&kcontrol->list, &card->controls);
card->controls_count += kcontrol->count;
for (idx = 0; idx < kcontrol->count; idx++, id.index++, id.numid++)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
return 0;
+
+ error:
+ snd_ctl_free_one(kcontrol);
+ return err;
}
+EXPORT_SYMBOL(snd_ctl_add);
+
/**
* snd_ctl_remove - remove the control from the card and release it
* @card: the card instance
return 0;
}
+EXPORT_SYMBOL(snd_ctl_remove);
+
/**
* snd_ctl_remove_id - remove the control of the given id and release it
* @card: the card instance
return ret;
}
+EXPORT_SYMBOL(snd_ctl_remove_id);
+
/**
* snd_ctl_remove_unlocked_id - remove the unlocked control of the given id and release it
* @file: active control handle
return 0;
}
+EXPORT_SYMBOL(snd_ctl_rename_id);
+
/**
* snd_ctl_find_numid - find the control instance with the given number-id
* @card: the card instance
return NULL;
}
+EXPORT_SYMBOL(snd_ctl_find_numid);
+
/**
* snd_ctl_find_id - find the control instance with the given id
* @card: the card instance
return NULL;
}
+EXPORT_SYMBOL(snd_ctl_find_id);
+
static int snd_ctl_card_info(struct snd_card *card, struct snd_ctl_file * ctl,
unsigned int cmd, void __user *arg)
{
if (copy_from_user(&info, _info, sizeof(info)))
return -EFAULT;
- result = snd_ctl_elem_info(ctl, &info);
+ snd_power_lock(ctl->card);
+ result = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
+ if (result >= 0)
+ result = snd_ctl_elem_info(ctl, &info);
+ snd_power_unlock(ctl->card);
if (result >= 0)
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;
return result;
}
+EXPORT_SYMBOL(snd_ctl_elem_read);
+
static int snd_ctl_elem_read_user(struct snd_card *card,
struct snd_ctl_elem_value __user *_control)
{
kfree(control);
return -EFAULT;
}
- result = snd_ctl_elem_read(card, control);
+ snd_power_lock(card);
+ result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
+ if (result >= 0)
+ result = snd_ctl_elem_read(card, control);
+ snd_power_unlock(card);
if (result >= 0)
if (copy_to_user(_control, control, sizeof(*control)))
result = -EFAULT;
return result;
}
+EXPORT_SYMBOL(snd_ctl_elem_write);
+
static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
struct snd_ctl_elem_value __user *_control)
{
struct snd_ctl_elem_value *control;
+ struct snd_card *card;
int result;
control = kmalloc(sizeof(*control), GFP_KERNEL);
kfree(control);
return -EFAULT;
}
- result = snd_ctl_elem_write(file->card, file, control);
+ card = file->card;
+ snd_power_lock(card);
+ result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
+ if (result >= 0)
+ result = snd_ctl_elem_write(card, file, control);
+ snd_power_unlock(card);
if (result >= 0)
if (copy_to_user(_control, control, sizeof(*control)))
result = -EFAULT;
return _snd_ctl_register_ioctl(fcn, &snd_control_ioctls);
}
+EXPORT_SYMBOL(snd_ctl_register_ioctl);
+
#ifdef CONFIG_COMPAT
int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn)
{
return _snd_ctl_register_ioctl(fcn, &snd_control_compat_ioctls);
}
+
+EXPORT_SYMBOL(snd_ctl_register_ioctl_compat);
#endif
/*
return _snd_ctl_unregister_ioctl(fcn, &snd_control_ioctls);
}
+EXPORT_SYMBOL(snd_ctl_unregister_ioctl);
+
#ifdef CONFIG_COMPAT
int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn)
{
return _snd_ctl_unregister_ioctl(fcn, &snd_control_compat_ioctls);
}
+EXPORT_SYMBOL(snd_ctl_unregister_ioctl_compat);
#endif
static int snd_ctl_fasync(int fd, struct file * file, int on)