diff --git a/drivers/serial/8250_acorn.c b/drivers/serial/8250_acorn.c
index 32af365..ef8cc8a 100644
--- a/drivers/serial/8250_acorn.c
+++ b/drivers/serial/8250_acorn.c
@@ -35,6 +35,7 @@
 struct serial_card_info {
 	unsigned int	num_ports;
 	int		ports[MAX_PORTS];
+	void __iomem *vaddr;
 };
 
 static int __devinit
@@ -44,7 +45,6 @@
 	struct serial_card_type *type = id->data;
 	struct uart_port port;
 	unsigned long bus_addr;
-	unsigned char __iomem *virt_addr;
 	unsigned int i;
 
 	info = kmalloc(sizeof(struct serial_card_info), GFP_KERNEL);
@@ -55,8 +55,8 @@
 	info->num_ports = type->num_ports;
 
 	bus_addr = ecard_resource_start(ec, type->type);
-	virt_addr = ioremap(bus_addr, ecard_resource_len(ec, type->type));
-	if (!virt_addr) {
+	info->vaddr = ioremap(bus_addr, ecard_resource_len(ec, type->type));
+	if (!info->vaddr) {
 		kfree(info);
 		return -ENOMEM;
 	}
@@ -72,7 +72,7 @@
 	port.dev	= &ec->dev;
 
 	for (i = 0; i < info->num_ports; i ++) {
-		port.membase = virt_addr + type->offset[i];
+		port.membase = info->vaddr + type->offset[i];
 		port.mapbase = bus_addr + type->offset[i];
 
 		info->ports[i] = serial8250_register_port(&port);
@@ -92,6 +92,7 @@
 		if (info->ports[i] > 0)
 			serial8250_unregister_port(info->ports[i]);
 
+	iounmap(info->vaddr);
 	kfree(info);
 }