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-rw-r--r--drivers/serial/mpc52xx_uart.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 7708e5dd365..dbad0e31e00 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -338,14 +338,23 @@ mpc52xx_uart_release_port(struct uart_port *port)
static int
mpc52xx_uart_request_port(struct uart_port *port)
{
+ int err;
+
if (port->flags & UPF_IOREMAP) /* Need to remap ? */
port->membase = ioremap(port->mapbase, MPC52xx_PSC_SIZE);
if (!port->membase)
return -EINVAL;
- return request_mem_region(port->mapbase, MPC52xx_PSC_SIZE,
+ err = request_mem_region(port->mapbase, MPC52xx_PSC_SIZE,
"mpc52xx_psc_uart") != NULL ? 0 : -EBUSY;
+
+ if (err && (port->flags & UPF_IOREMAP)) {
+ iounmap(port->membase);
+ port->membase = NULL;
+ }
+
+ return err;
}
static void