rtc: Cocci spatch "ptr_ret.spatch"

diff -u -p a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
@@ -249,10 +249,7 @@ static int da9052_rtc_probe(struct platf
 
 	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				       &da9052_rtc_ops, THIS_MODULE);
-	if (IS_ERR(rtc->rtc))
-		return PTR_ERR(rtc->rtc);
-
-	return 0;
+	return PTR_RET(rtc->rtc);
 }
 
 static int da9052_rtc_remove(struct platform_device *pdev)

diff -u -p a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
@@ -267,10 +267,7 @@ static int isl12022_probe(struct i2c_cli
 	isl12022->rtc = devm_rtc_device_register(&client->dev,
 					isl12022_driver.driver.name,
 					&isl12022_rtc_ops, THIS_MODULE);
-	if (IS_ERR(isl12022->rtc))
-		return PTR_ERR(isl12022->rtc);
-
-	return 0;
+	return PTR_RET(isl12022->rtc);
 }
 
 static int isl12022_remove(struct i2c_client *client)

diff -u -p a/drivers/rtc/rtc-m48t35.c b/drivers/rtc/rtc-m48t35.c
@@ -174,10 +174,7 @@ static int m48t35_probe(struct platform_
 
 	priv->rtc = devm_rtc_device_register(&pdev->dev, "m48t35",
 				  &m48t35_ops, THIS_MODULE);
-	if (IS_ERR(priv->rtc))
-		return PTR_ERR(priv->rtc);
-
-	return 0;
+	return PTR_RET(priv->rtc);
 }
 
 static int m48t35_remove(struct platform_device *pdev)

diff -u -p a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
@@ -263,10 +263,7 @@ static int pcf8563_probe(struct i2c_clie
 				pcf8563_driver.driver.name,
 				&pcf8563_rtc_ops, THIS_MODULE);
 
-	if (IS_ERR(pcf8563->rtc))
-		return PTR_ERR(pcf8563->rtc);
-
-	return 0;
+	return PTR_RET(pcf8563->rtc);
 }
 
 static int pcf8563_remove(struct i2c_client *client)

diff -u -p a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c
@@ -283,10 +283,7 @@ static int pcf8583_probe(struct i2c_clie
 				pcf8583_driver.driver.name,
 				&pcf8583_rtc_ops, THIS_MODULE);
 
-	if (IS_ERR(pcf8583->rtc))
-		return PTR_ERR(pcf8583->rtc);
-
-	return 0;
+	return PTR_RET(pcf8583->rtc);
 }
 
 static int pcf8583_remove(struct i2c_client *client)