diff --git a/[refs] b/[refs]
index bb5757f71e06..1fd371bec11a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 159d4e1e73dc2c4745b3edb2f2ae51caaae37e5f
+refs/heads/master: 04e2c2e3bfb1652510d4c12ac2837a8f8b08bd3a
diff --git a/trunk/drivers/tty/serial/pch_uart.c b/trunk/drivers/tty/serial/pch_uart.c
index d2873c67d25d..e7d91d973d52 100644
--- a/trunk/drivers/tty/serial/pch_uart.c
+++ b/trunk/drivers/tty/serial/pch_uart.c
@@ -39,6 +39,7 @@ enum {
 	PCH_UART_HANDLED_RX_ERR_INT_SHIFT,
 	PCH_UART_HANDLED_RX_TRG_INT_SHIFT,
 	PCH_UART_HANDLED_MS_INT_SHIFT,
+	PCH_UART_HANDLED_LS_INT_SHIFT,
 };
 
 enum {
@@ -63,6 +64,8 @@ enum {
 					PCH_UART_HANDLED_RX_TRG_INT_SHIFT)<<1))
 #define PCH_UART_HANDLED_MS_INT	(1<<((PCH_UART_HANDLED_MS_INT_SHIFT)<<1))
 
+#define PCH_UART_HANDLED_LS_INT	(1<<((PCH_UART_HANDLED_LS_INT_SHIFT)<<1))
+
 #define PCH_UART_RBR		0x00
 #define PCH_UART_THR		0x00
 
@@ -1058,6 +1061,8 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
 						UART_LSR_PE | UART_LSR_OE)) {
 				pch_uart_err_ir(priv, lsr);
 				ret = PCH_UART_HANDLED_RX_ERR_INT;
+			} else {
+				ret = PCH_UART_HANDLED_LS_INT;
 			}
 			break;
 		case PCH_UART_IID_RDR:	/* Received Data Ready */