linux-kernel - [PATCH] serial: omap: Fix IRQ handling return value

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Date:	Wed, 17 Jul 2013 16:29:13 +0300
From:	Alexander Savchenko <oleksandr.savchenko@...com>
To:	<gregkh@...uxfoundation.org>, <jslaby@...e.cz>
CC:	<linux-serial@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Ruchika Kharwar <ruchika@...com>,
	Alexander Savchenko <oleksandr.savchenko@...com>
Subject: [PATCH] serial: omap: Fix IRQ handling return value

From: Ruchika Kharwar <ruchika@...com>

Ensure the Interrupt handling routine return IRQ_HANDLED vs
IRQ_NONE.

Signed-off-by: Ruchika Kharwar <ruchika@...com>
Signed-off-by: Alexander Savchenko <oleksandr.savchenko@...com>
---
 drivers/tty/serial/omap-serial.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index b6d1728..70feeb3 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -479,7 +479,6 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
 	struct uart_omap_port *up = dev_id;
 	unsigned int iir, lsr;
 	unsigned int type;
-	irqreturn_t ret = IRQ_NONE;
 	int max_count = 256;
 
 	spin_lock(&up->port.lock);
@@ -490,7 +489,6 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
 		if (iir & UART_IIR_NO_INT)
 			break;
 
-		ret = IRQ_HANDLED;
 		lsr = serial_in(up, UART_LSR);
 
 		/* extract IRQ type from IIR register */
@@ -529,7 +527,7 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
 	pm_runtime_put_autosuspend(up->dev);
 	up->port_activity = jiffies;
 
-	return ret;
+	return IRQ_HANDLED;
 }
 
 static unsigned int serial_omap_tx_empty(struct uart_port *port)
-- 
1.7.9.5

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