rtc: rtc-max8997: use devm_request_threaded_irq()

Use devm_request_threaded_irq() to make cleanup paths more simple.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-max8997.c

@@ -495,7 +495,8 @@ static int max8997_rtc_probe(struct platform_device *pdev)
 	}
 	info->virq = virq;
 
-	ret = request_threaded_irq(virq, NULL, max8997_rtc_alarm_irq, 0,
+	ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+				max8997_rtc_alarm_irq, 0,
 				"rtc-alarm0", info);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
@@ -514,10 +515,8 @@ static int max8997_rtc_remove(struct platform_device *pdev)
 {
 	struct max8997_rtc_info *info = platform_get_drvdata(pdev);
 
-	if (info) {
-		free_irq(info->virq, info);
+	if (info)
 		rtc_device_unregister(info->rtc_dev);
-	}
 
 	return 0;
 }