From 0787691230d88af8cdfc6d4085957bbf7cec1e5d Mon Sep 17 00:00:00 2001
From: Mans Rullgard <mans@mansr.com>
Date: Sun, 8 Mar 2015 14:30:05 +0000
Subject: [PATCH] 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>
---
 drivers/tty/serial/of_serial.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index d8c4eea23b7c..aa00154c4a6d 100644
--- 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)
-- 
2.30.9