1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
index 52a027aaa370..d661cf7de140 100644
--- a/drivers/usb/host/ehci-w90x900.c
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -41,7 +41,7 @@ static int __devinit usb_w90x900_probe(const struct hc_driver *driver,
         }
 
         hcd->rsrc_start = res->start;
-        hcd->rsrc_len = res->end - res->start + 1;
+        hcd->rsrc_len = resource_size(res);
 
         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
                 retval = -EBUSY;