watchdog: rc32434_wdt: use devm_ioremap_nocache() functions

Use devm_ioremap_nocache() functions to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/rc32434_wdt.c

@@ -32,6 +32,7 @@
 #include <linux/platform_device.h>	/* For platform_driver framework */
 #include <linux/spinlock.h>		/* For spin_lock/spin_unlock/... */
 #include <linux/uaccess.h>		/* For copy_to_user/put_user/... */
+#include <linux/io.h>			/* For devm_ioremap_nocache */
 
 #include <asm/mach-rc32434/integ.h>	/* For the Watchdog registers */
 
@@ -271,7 +272,7 @@ static int rc32434_wdt_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	wdt_reg = ioremap_nocache(r->start, resource_size(r));
+	wdt_reg = devm_ioremap_nocache(&pdev->dev, r->start, resource_size(r));
 	if (!wdt_reg) {
 		pr_err("failed to remap I/O resources\n");
 		return -ENXIO;
@@ -293,23 +294,18 @@ static int rc32434_wdt_probe(struct platform_device *pdev)
 	ret = misc_register(&rc32434_wdt_miscdev);
 	if (ret < 0) {
 		pr_err("failed to register watchdog device\n");
-		goto unmap;
+		return ret;
 	}
 
 	pr_info("Watchdog Timer version " VERSION ", timer margin: %d sec\n",
 		timeout);
 
 	return 0;
-
-unmap:
-	iounmap(wdt_reg);
-	return ret;
 }
 
 static int rc32434_wdt_remove(struct platform_device *pdev)
 {
 	misc_deregister(&rc32434_wdt_miscdev);
-	iounmap(wdt_reg);
 	return 0;
 }