diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 413e4fcadcaf..99b4e3355435 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1102,25 +1102,26 @@ static int acpi_data_prop_read(const struct acpi_device_data *data,
 	switch (proptype) {
 	case DEV_PROP_STRING:
 		break;
-	case DEV_PROP_U8 ... DEV_PROP_U64:
+	default:
 		if (obj->type == ACPI_TYPE_BUFFER) {
 			if (nval > obj->buffer.length)
 				return -EOVERFLOW;
-			break;
+		} else {
+			if (nval > obj->package.count)
+				return -EOVERFLOW;
 		}
-		fallthrough;
-	default:
-		if (nval > obj->package.count)
-			return -EOVERFLOW;
 		break;
 	}
 	if (nval == 0)
 		return -EINVAL;
 
-	if (obj->type != ACPI_TYPE_BUFFER)
-		items = obj->package.elements;
-	else
+	if (obj->type == ACPI_TYPE_BUFFER) {
+		if (proptype != DEV_PROP_U8)
+			return -EPROTO;
 		items = obj;
+	} else {
+		items = obj->package.elements;
+	}
 
 	switch (proptype) {
 	case DEV_PROP_U8: