diff --git a/sound/core/control.c b/sound/core/control.c
index be5b97c..196a6fe 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1029,7 +1029,7 @@
 struct user_element {
 	struct snd_ctl_elem_info info;
 	struct snd_card *card;
-	void *elem_data;		/* element data */
+	char *elem_data;		/* element data */
 	unsigned long elem_data_size;	/* size of element data in bytes */
 	void *tlv_data;			/* TLV data */
 	unsigned long tlv_data_size;	/* TLV data size */
@@ -1078,9 +1078,12 @@
 				 struct snd_ctl_elem_value *ucontrol)
 {
 	struct user_element *ue = kcontrol->private_data;
+	unsigned int size = ue->elem_data_size;
+	char *src = ue->elem_data +
+			snd_ctl_get_ioff(kcontrol, &ucontrol->id) * size;
 
 	mutex_lock(&ue->card->user_ctl_lock);
-	memcpy(&ucontrol->value, ue->elem_data, ue->elem_data_size);
+	memcpy(&ucontrol->value, src, size);
 	mutex_unlock(&ue->card->user_ctl_lock);
 	return 0;
 }
@@ -1090,11 +1093,14 @@
 {
 	int change;
 	struct user_element *ue = kcontrol->private_data;
+	unsigned int size = ue->elem_data_size;
+	char *dst = ue->elem_data +
+			snd_ctl_get_ioff(kcontrol, &ucontrol->id) * size;
 
 	mutex_lock(&ue->card->user_ctl_lock);
-	change = memcmp(&ucontrol->value, ue->elem_data, ue->elem_data_size) != 0;
+	change = memcmp(&ucontrol->value, dst, size) != 0;
 	if (change)
-		memcpy(ue->elem_data, &ucontrol->value, ue->elem_data_size);
+		memcpy(dst, &ucontrol->value, size);
 	mutex_unlock(&ue->card->user_ctl_lock);
 	return change;
 }
@@ -1278,7 +1284,7 @@
 	if (err < 0)
 		return err;
 	memcpy(&kctl->id, &info->id, sizeof(kctl->id));
-	kctl->private_data = kzalloc(sizeof(struct user_element) + private_size,
+	kctl->private_data = kzalloc(sizeof(struct user_element) + private_size * count,
 				     GFP_KERNEL);
 	if (kctl->private_data == NULL) {
 		kfree(kctl);