[PATCH] serial: trivial code flow simplification

Return failure immediately, so we don't have to test it twice.
Signed-off-by: NBjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/serial/8250_pnp.c

@@ -450,11 +450,11 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
 	port.dev = &dev->dev;
 
 	line = serial8250_register_port(&port);
+	if (line < 0)
+		return -ENODEV;
 
-	if (line >= 0)
 	pnp_set_drvdata(dev, (void *)((long)line + 1));
-	return line >= 0 ? 0 : -ENODEV;
-
+	return 0;
 }
 
 static void __devexit serial_pnp_remove(struct pnp_dev *dev)