From: Gregory Hermant <gregory.hermant@calao-systems.com>
Date: Thu, 3 Apr 2014 21:50:17 +0000 (-0700)
Subject: drivers/rtc/rtc-rv3029c2.c: fix potential race condition
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=67ab2440b40610b3b91068844640df6d3de3464f;p=linux-beck.git

drivers/rtc/rtc-rv3029c2.c: fix potential race condition

RTC drivers must not return an error after device registration.

Signed-off-by: Gregory Hermant <gregory.hermant@calao-systems.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index 1a779a67ff66..e9ac5a43be1a 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -395,6 +395,12 @@ static int rv3029c2_probe(struct i2c_client *client,
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_EMUL))
 		return -ENODEV;
 
+	rc = rv3029c2_i2c_get_sr(client, buf);
+	if (rc < 0) {
+		dev_err(&client->dev, "reading status failed\n");
+		return rc;
+	}
+
 	rtc = devm_rtc_device_register(&client->dev, client->name,
 					&rv3029c2_rtc_ops, THIS_MODULE);
 
@@ -403,12 +409,6 @@ static int rv3029c2_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, rtc);
 
-	rc = rv3029c2_i2c_get_sr(client, buf);
-	if (rc < 0) {
-		dev_err(&client->dev, "reading status failed\n");
-		return rc;
-	}
-
 	return 0;
 }