serial: bfin_sport_uart: Use resource size to fix off-by-one error

Use the resource_size function instead of manually calculating the
resource size. This actually fixes an off-by-one error.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c
index 66cda2290de0..e57fb3d228e2 100644
--- a/drivers/serial/bfin_sport_uart.c
+++ b/drivers/serial/bfin_sport_uart.c
@@ -774,8 +774,7 @@ static int __devinit sport_uart_probe(struct platform_device *pdev)
                         goto out_error_free_peripherals;
                 }
 
-                sport->port.membase = ioremap(res->start,
-                        res->end - res->start);
+                sport->port.membase = ioremap(res->start, resource_size(res));
                 if (!sport->port.membase) {
                         dev_err(&pdev->dev, "Cannot map sport IO\n");
                         ret = -ENXIO;