rtc: rtc-pcf2123: use devm_*() functions

Use devm_*() functions to make cleanup paths simpler.
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-pcf2123.c

@@ -226,7 +226,8 @@ static int pcf2123_probe(struct spi_device *spi)
 	u8 txbuf[2], rxbuf[2];
 	int ret, i;
 
-	pdata = kzalloc(sizeof(struct pcf2123_plat_data), GFP_KERNEL);
+	pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data),
+				GFP_KERNEL);
 	if (!pdata)
 		return -ENOMEM;
 	spi->dev.platform_data = pdata;
@@ -281,7 +282,7 @@ static int pcf2123_probe(struct spi_device *spi)
 	pcf2123_delay_trec();
 
 	/* Finalize the initialization */
-	rtc = rtc_device_register(pcf2123_driver.driver.name, &spi->dev,
+	rtc = devm_rtc_device_register(&spi->dev, pcf2123_driver.driver.name,
 			&pcf2123_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc)) {
@@ -314,7 +315,6 @@ static int pcf2123_probe(struct spi_device *spi)
 		device_remove_file(&spi->dev, &pdata->regs[i].attr);
 
 kfree_exit:
-	kfree(pdata);
 	spi->dev.platform_data = NULL;
 	return ret;
 }
@@ -325,15 +325,10 @@ static int pcf2123_remove(struct spi_device *spi)
 	int i;
 
 	if (pdata) {
-		struct rtc_device *rtc = pdata->rtc;
-
-		if (rtc)
-			rtc_device_unregister(rtc);
 		for (i = 0; i < 16; i++)
 			if (pdata->regs[i].name[0])
 				device_remove_file(&spi->dev,
 						   &pdata->regs[i].attr);
-		kfree(pdata);
 	}
 
 	return 0;