net/irda: fix error return code in bfin_sir_open()

Fix to return -ENOMEM in the irlap_open() error handling case instead
of 0(overwrite to 0 by bfin_sir_startup()), as done elsewhere in this
function.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/bfin_sir.c

@@ -609,7 +609,7 @@ static int bfin_sir_open(struct net_device *dev)
 {
 	struct bfin_sir_self *self = netdev_priv(dev);
 	struct bfin_sir_port *port = self->sir_port;
-	int err = -ENOMEM;
+	int err;
 
 	self->newspeed = 0;
 	self->speed = 9600;
@@ -623,8 +623,10 @@ static int bfin_sir_open(struct net_device *dev)
 	bfin_sir_set_speed(port, 9600);
 
 	self->irlap = irlap_open(dev, &self->qos, DRIVER_NAME);
-	if (!self->irlap)
+	if (!self->irlap) {
+		err = -ENOMEM;
 		goto err_irlap;
+	}
 
 	INIT_WORK(&self->work, bfin_sir_send_work);