1 files changed, 36 insertions, 13 deletions

diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c
index 418c6d4e5da..84fef5084e1 100644
--- a/sound/core/control_compat.c
+++ b/sound/core/control_compat.c
@@ -107,7 +107,13 @@ 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_ctl_elem_info(ctl, data);
+
+	snd_power_lock(ctl->card);
+	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0, NULL);
+	if (err >= 0)
+		err = snd_ctl_elem_info(ctl, data);
+	snd_power_unlock(ctl->card);
+
 	if (err < 0)
 		goto error;
 	/* restore info to 32bit */
@@ -167,7 +173,7 @@ static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
 			int *countp)
 {
 	struct snd_kcontrol *kctl;
-	struct snd_ctl_elem_info info;
+	struct snd_ctl_elem_info *info;
 	int err;
 
 	down_read(&card->controls_rwsem);
@@ -176,13 +182,19 @@ static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
 		up_read(&card->controls_rwsem);
 		return -ENXIO;
 	}
-	info.id = *id;
-	err = kctl->info(kctl, &info);
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (info == NULL) {
+		up_read(&card->controls_rwsem);
+		return -ENOMEM;
+	}
+	info->id = *id;
+	err = kctl->info(kctl, info);
 	up_read(&card->controls_rwsem);
 	if (err >= 0) {
-		err = info.type;
-		*countp = info.count;
+		err = info->type;
+		*countp = info->count;
 	}
+	kfree(info);
 	return err;
 }
 
@@ -280,9 +292,14 @@ static int snd_ctl_elem_read_user_compat(struct snd_card *card,
 
 	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
 		goto error;
-	if ((err = snd_ctl_elem_read(card, data)) < 0)
-		goto error;
-	err = copy_ctl_value_to_user(data32, data, type, count);
+
+	snd_power_lock(card);
+	err = snd_power_wait(card, SNDRV_CTL_POWER_D0, NULL);
+	if (err >= 0)
+		err = snd_ctl_elem_read(card, data);
+	snd_power_unlock(card);
+	if (err >= 0)
+		err = copy_ctl_value_to_user(data32, data, type, count);
  error:
 	kfree(data);
 	return err;
@@ -292,17 +309,23 @@ static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
 					  struct snd_ctl_elem_value32 __user *data32)
 {
 	struct snd_ctl_elem_value *data;
+	struct snd_card *card = file->card;
 	int err, type, count;
 
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (data == NULL)
 		return -ENOMEM;
 
-	if ((err = copy_ctl_value_from_user(file->card, data, data32, &type, &count)) < 0)
-		goto error;
-	if ((err = snd_ctl_elem_write(file->card, file, data)) < 0)
+	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
 		goto error;
-	err = copy_ctl_value_to_user(data32, data, type, count);
+
+	snd_power_lock(card);
+	err = snd_power_wait(card, SNDRV_CTL_POWER_D0, NULL);
+	if (err >= 0)
+		err = snd_ctl_elem_write(card, file, data);
+	snd_power_unlock(card);
+	if (err >= 0)
+		err = copy_ctl_value_to_user(data32, data, type, count);
  error:
 	kfree(data);
 	return err;