linux-kernel - [PATCH 2/2] serial: of: set port iomem size from devicetree

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Date:	Sun,  8 Mar 2015 14:30:05 +0000
From:	Mans Rullgard <mans@...sr.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] 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@...sr.com>
---
 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 7ff61e2..b1d4744 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)
-- 
2.3.1

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