static int snd_ctl_open(struct inode *inode, struct file *file)
{
- int cardnum = SNDRV_MINOR_CARD(iminor(inode));
unsigned long flags;
struct snd_card *card;
struct snd_ctl_file *ctl;
int err;
- card = snd_cards[cardnum];
+ card = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_CONTROL);
if (!card) {
err = -ENODEV;
goto __error1;
{
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;
}
/**
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;
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;
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;
kctl.private_free = snd_ctl_elem_user_free;
_kctl = snd_ctl_new(&kctl, access);
if (_kctl == NULL) {
- kfree(_kctl->private_data);
+ kfree(ue);
return -ENOMEM;
}
_kctl->private_data = ue;
for (idx = 0; idx < _kctl->count; idx++)
_kctl->vd[idx].owner = file;
err = snd_ctl_add(card, _kctl);
- if (err < 0) {
- snd_ctl_free_one(_kctl);
+ if (err < 0)
return err;
- }
down_write(&card->controls_rwsem);
card->user_ctl_count++;
.fasync = snd_ctl_fasync,
};
-static struct snd_minor snd_ctl_reg =
-{
- .comment = "ctl",
- .f_ops = &snd_ctl_f_ops,
-};
-
/*
* registration of the control device
*/
cardnum = card->number;
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
sprintf(name, "controlC%i", cardnum);
- if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL,
- card, 0, &snd_ctl_reg, name)) < 0)
+ if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,
+ &snd_ctl_f_ops, card, name)) < 0)
return err;
return 0;
}
snd_assert(card != NULL, return -ENXIO);
cardnum = card->number;
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
- if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, card, 0)) < 0)
+ if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL,
+ card, -1)) < 0)
return err;
return snd_ctl_dev_free(device);
}