diff --git a/drivers/usb/host/ohci-sh.c b/drivers/usb/host/ohci-sh.c
index 60f03cc7ec4f20a4f80d228b59faebe715ae1148..0b35d22cc70edc3280bba59c29312094a564a917 100644
--- a/drivers/usb/host/ohci-sh.c
+++ b/drivers/usb/host/ohci-sh.c
@@ -77,7 +77,6 @@ static const struct hc_driver ohci_sh_hc_driver = {
 
 /*-------------------------------------------------------------------------*/
 
-#define resource_len(r) (((r)->end - (r)->start) + 1)
 static int ohci_hcd_sh_probe(struct platform_device *pdev)
 {
 	struct resource *res = NULL;
@@ -109,7 +108,7 @@ static int ohci_hcd_sh_probe(struct platform_device *pdev)
 
 	hcd->regs = (void __iomem *)res->start;
 	hcd->rsrc_start = res->start;
-	hcd->rsrc_len = resource_len(res);
+	hcd->rsrc_len = resource_size(res);
 	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
 	if (ret != 0) {
 		err("Failed to add hcd");