txx9wdt.c: use resource_size()

[H Hartley Sweeten]

Use resource_size().

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Wim Van Sebroeck <wim@xxxxxxxxx>

---

diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c
index 6adab77..fab1ed9 100644
--- a/drivers/watchdog/txx9wdt.c
+++ b/drivers/watchdog/txx9wdt.c
@@ -215,11 +215,11 @@ static int __init txx9wdt_probe(struct platform_device *dev)
 	if (!res)
 		goto exit_busy;
 	if (!devm_request_mem_region(&dev->dev,
-				     res->start, res->end - res->start + 1,
+				     res->start, resource_size(res),
 				     "txx9wdt"))
 		goto exit_busy;
 	txx9wdt_reg = devm_ioremap(&dev->dev,
-				   res->start, res->end - res->start + 1);
+				   res->start, resource_size(res));
 	if (!txx9wdt_reg)
 		goto exit_busy;
  
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