Bluetooth: Check return value of hci_recv_stream_fragment()

It may return error and in this case we do add to the stats.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

drivers/bluetooth/hci_h4.c

@@ -151,8 +151,13 @@ static inline int h4_check_data_len(struct h4_struct *h4, int len)
 /* Recv data */
 static int h4_recv(struct hci_uart *hu, void *data, int count)
 {
-	if (hci_recv_stream_fragment(hu->hdev, data, count) < 0)
+	int ret;
+
+	ret = hci_recv_stream_fragment(hu->hdev, data, count);
+	if (ret < 0) {
 		BT_ERR("Frame Reassembly Failed");
+		return ret;
+	}
 
 	return count;
 }