ALSA: control: Drop superfluous snd_power_wait() calls

Now we have more fine-grained power controls in each kcontrol ops, the
coarse checks of snd_power_wait() in a few control ioctls became
superfluous.  Let's drop them.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20210523090920.15345-4-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/control.c

@@ -1045,9 +1045,6 @@ static int snd_ctl_elem_info_user(struct snd_ctl_file *ctl,
 
 	if (copy_from_user(&info, _info, sizeof(info)))
 		return -EFAULT;
-	result = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
-	if (result < 0)
-		return result;
 	result = snd_ctl_elem_info(ctl, &info);
 	if (result < 0)
 		return result;
@@ -1119,10 +1116,6 @@ static int snd_ctl_elem_read_user(struct snd_card *card,
 	if (IS_ERR(control))
 		return PTR_ERR(control);
 
-	result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
-	if (result < 0)
-		goto error;
-
 	down_read(&card->controls_rwsem);
 	result = snd_ctl_elem_read(card, control);
 	up_read(&card->controls_rwsem);
@@ -1192,10 +1185,6 @@ static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
 		return PTR_ERR(control);
 
 	card = file->card;
-	result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
-	if (result < 0)
-		goto error;
-
 	result = snd_ctl_elem_write(card, file, control);
 	if (result < 0)
 		goto error;

sound/core/control_compat.c

@@ -96,9 +96,6 @@ static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
 	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
 		goto error;
 
-	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
-	if (err < 0)
-		goto error;
 	err = snd_ctl_elem_info(ctl, data);
 	if (err < 0)
 		goto error;
@@ -301,9 +298,6 @@ static int ctl_elem_read_user(struct snd_card *card,
 	if (err < 0)
 		goto error;
 
-	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
-	if (err < 0)
-		goto error;
 	err = snd_ctl_elem_read(card, data);
 	if (err < 0)
 		goto error;
@@ -329,9 +323,6 @@ static int ctl_elem_write_user(struct snd_ctl_file *file,
 	if (err < 0)
 		goto error;
 
-	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
-	if (err < 0)
-		goto error;
 	err = snd_ctl_elem_write(card, file, data);
 	if (err < 0)
 		goto error;