From: Gabor Juhos <juhosg@xxxxxxxxxxx>
Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
---
drivers/tty/serial/of_serial.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 42f8550..e4be45b 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -88,10 +88,14 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
spin_lock_init(&port->lock);
port->mapbase = resource.start;
+ port->iosize = resource_size(&resource);
/* Check for shifted address mapping */
- if (of_property_read_u32(np, "reg-offset", &prop) == 0)
+ if (of_property_read_u32(np, "reg-offset", &prop) == 0) {
port->mapbase += prop;
+ if (prop > port->iosize)
+ port->iosize -= prop;
+ }
/* Check for registers offset within the devices address range */
if (of_property_read_u32(np, "reg-shift", &prop) == 0)
--
1.7.10.4
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