serial: cast before shifting on port io

Without this we will shift data into oblivion and give wrong results on
some configurations

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index d3dd4ad..63b3388 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2366,7 +2366,7 @@ static ssize_t uart_get_attr_port(struct device *dev,
        struct tty_port *port = dev_get_drvdata(dev);
 
        uart_get_info(port, &tmp);
-       return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)(tmp.port | (tmp.port_high << HIGH_BITS_OFFSET)));
+       return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)(tmp.port | (((unsigned long)tmp.port_high) << HIGH_BITS_OFFSET)));
 }
 
 static ssize_t uart_get_attr_irq(struct device *dev,