linux-kernel - [PATCH 6/7] pch_uart: Fix return value issue

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Date:	Mon, 26 Mar 2012 14:43:05 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Alan Cox <alan@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	qi.wang@...el.com, yong.y.wang@...el.com, joel.clark@...el.com,
	kok.howg.ewe@...el.com, Tomoya MORINAGA <tomoya.rohm@...il.com>
Subject: [PATCH 6/7] pch_uart: Fix return value issue

Currently, occurring line status interrupt,
returned value is not set in interrupt handler function.
As a result, 0 can be returned.

This patch adds setting returned value.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
---
 drivers/tty/serial/pch_uart.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 020bbf3..6e7f0ac 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/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
 
@@ -1062,6 +1065,8 @@ 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 */
-- 
1.7.7.6

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