serial: of: set port iomem size from devicetree

Make the 8250 driver reserve exactly the mmio region specified
in the devicetree. This prevents conflicts between UPIO_AU type
UARTs and other devices mapped closer than the default size of
0x1000 (or 0x100 for RT2880).

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index d8c4eea23b7cdde3024daf7bb540b178e58b3bfe..aa00154c4a6db5af75080e671e7615c70521dc44 100644 (file)
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -89,6 +89,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 
        spin_lock_init(&port->lock);
        port->mapbase = resource.start;
+       port->mapsize = resource_size(&resource);
 
        /* Check for shifted address mapping */
        if (of_property_read_u32(np, "reg-offset", &prop) == 0)