linux-kernel - [PATCH 2/7] pch_uart: change type to u8

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Date:	Mon, 26 Mar 2012 14:43:01 +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 2/7] pch_uart: change type to u8

Target uart register access size is 8bit.
However, 32bit is used at 2 points.

This patch modifies type "unsigned int" to "unsigned char".

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
---
 drivers/tty/serial/pch_uart.c |   12 ++++--------
 1 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 80609e4..6347f01 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -556,14 +556,10 @@ static int pch_uart_hal_read(struct eg20t_port *priv, unsigned char *buf,
 	return i;
 }
 
-static unsigned int pch_uart_hal_get_iid(struct eg20t_port *priv)
+static unsigned char pch_uart_hal_get_iid(struct eg20t_port *priv)
 {
-	unsigned int iir;
-	int ret;
-
-	iir = ioread8(priv->membase + UART_IIR);
-	ret = (iir & (PCH_UART_IIR_IID | PCH_UART_IIR_TOI | PCH_UART_IIR_IP));
-	return ret;
+	return ioread8(priv->membase + UART_IIR) &\
+		      (PCH_UART_IIR_IID | PCH_UART_IIR_TOI | PCH_UART_IIR_IP);
 }
 
 static u8 pch_uart_hal_get_line_status(struct eg20t_port *priv)
@@ -1049,7 +1045,7 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
 	unsigned int handled;
 	u8 lsr;
 	int ret = 0;
-	unsigned int iid;
+	unsigned char iid;
 	unsigned long flags;
 
 	spin_lock_irqsave(&priv->port.lock, flags);
-- 
1.7.7.6

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