serial: omap: Fix IRQ handling return value

Ensure the Interrupt handling routine return IRQ_HANDLED vs
IRQ_NONE.

Signed-off-by: Ruchika Kharwar <ruchika@ti.com>
Signed-off-by: Alexander Savchenko <oleksandr.savchenko@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 72bb690829af..b0802149b3e7 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -485,7 +485,6 @@ 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);
@@ -496,7 +495,6 @@ 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 */
@@ -535,7 +533,7 @@ 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)