diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 6a7a619..4f3e265 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -568,11 +568,11 @@
 	host->mmc = mmc;
 	platform_set_drvdata(dev, mmc);
 
-	host->ctl = ioremap(res_ctl->start, res_ctl->end - res_ctl->start);
+	host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
 	if (!host->ctl)
 		goto host_free;
 
-	host->cnf = ioremap(res_cnf->start, res_cnf->end - res_cnf->start);
+	host->cnf = ioremap(res_cnf->start, resource_size(res_cnf));
 	if (!host->cnf)
 		goto unmap_ctl;