rtc: rtc-davinci: use devm_*() functions

Use devm_*() functions 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-davinci.c

@@ -506,19 +506,19 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 	davinci_rtc->pbase = res->start;
 	davinci_rtc->base_size = resource_size(res);
 
-	mem = request_mem_region(davinci_rtc->pbase, davinci_rtc->base_size,
-				 pdev->name);
+	mem = devm_request_mem_region(dev, davinci_rtc->pbase,
+				davinci_rtc->base_size, pdev->name);
 	if (!mem) {
 		dev_err(dev, "RTC registers at %08x are not free\n",
 			davinci_rtc->pbase);
 		return -EBUSY;
 	}
 
-	davinci_rtc->base = ioremap(davinci_rtc->pbase, davinci_rtc->base_size);
+	davinci_rtc->base = devm_ioremap(dev, davinci_rtc->pbase,
+					davinci_rtc->base_size);
 	if (!davinci_rtc->base) {
 		dev_err(dev, "unable to ioremap MEM resource\n");
-		ret = -ENOMEM;
-		goto fail2;
+		return -ENOMEM;
 	}
 
 	platform_set_drvdata(pdev, davinci_rtc);
@@ -529,7 +529,7 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 		ret = PTR_ERR(davinci_rtc->rtc);
 		dev_err(dev, "unable to register RTC device, err %d\n",
 				ret);
-		goto fail3;
+		goto fail1;
 	}
 
 	rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS, PRTCIF_INTFLG);
@@ -539,11 +539,11 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 	rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CTRL);
 	rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CCTRL);
 
-	ret = request_irq(davinci_rtc->irq, davinci_rtc_interrupt,
+	ret = devm_request_irq(dev, davinci_rtc->irq, davinci_rtc_interrupt,
 			  0, "davinci_rtc", davinci_rtc);
 	if (ret < 0) {
 		dev_err(dev, "unable to register davinci RTC interrupt\n");
-		goto fail4;
+		goto fail2;
 	}
 
 	/* Enable interrupts */
@@ -557,13 +557,10 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 
 	return 0;
 
-fail4:
-	rtc_device_unregister(davinci_rtc->rtc);
-fail3:
-	platform_set_drvdata(pdev, NULL);
-	iounmap(davinci_rtc->base);
 fail2:
-	release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size);
+	rtc_device_unregister(davinci_rtc->rtc);
+fail1:
+	platform_set_drvdata(pdev, NULL);
 	return ret;
 }
 
@@ -575,13 +572,8 @@ static int davinci_rtc_remove(struct platform_device *pdev)
 
 	rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
 
-	free_irq(davinci_rtc->irq, davinci_rtc);
-
 	rtc_device_unregister(davinci_rtc->rtc);
 
-	iounmap(davinci_rtc->base);
-	release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size);
-
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;