diff --git a/[refs] b/[refs]
index c8d5230db392..28a79b34b3c6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: df04baf1e6a62ff232fa224504ccaa987b5be230
+refs/heads/master: 8c4210e3362e1cd44bd10c857dc5f69c0bf434da
diff --git a/trunk/drivers/serial/bfin_5xx.c b/trunk/drivers/serial/bfin_5xx.c
index d7b271656a2d..12b11da40b49 100644
--- a/trunk/drivers/serial/bfin_5xx.c
+++ b/trunk/drivers/serial/bfin_5xx.c
@@ -401,9 +401,11 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart)
 	else
 		flg = TTY_NORMAL;
 
-	for (i = uart->rx_dma_buf.tail; i != uart->rx_dma_buf.head; i++) {
+	for (i = uart->rx_dma_buf.tail; ; i++) {
 		if (i >= UART_XMIT_SIZE)
 			i = 0;
+		if (i == uart->rx_dma_buf.head)
+			break;
 		if (!uart_handle_sysrq_char(&uart->port, uart->rx_dma_buf.buf[i]))
 			uart_insert_char(&uart->port, status, OE,
 				uart->rx_dma_buf.buf[i], flg);