Use resource_size().

Signed-off-by: H Hartley Sweeten <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>

---

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index fc25586..150242f 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1628,7 +1628,7 @@ static int __init atmci_probe(struct platform_device 
*pdev)
        }
 
        ret = -ENOMEM;
-       host->regs = ioremap(regs->start, regs->end - regs->start + 1);
+       host->regs = ioremap(regs->start, resource_size(regs));
        if (!host->regs)
                goto err_ioremap;
  
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