linux-kernel - [PATCH] rtc: max8925: Set dev_set_drvdata before rtc_device

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Message-Id: <1303929869-25249-1-git-send-email-john.stultz@linaro.org>
Date:	Wed, 27 Apr 2011 11:44:29 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Zhangfei Gao <zhangfei.gao@...vell.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH] rtc: max8925: Set dev_set_drvdata before rtc_device_register

From: Zhangfei Gao <zhangfei.gao@...vell.com>

	We now call rtc_read_alarm from rtc_device_register, so it
is important that the rtc device is fully initialized prior to
reigstration.

Because of this, With rtc-max8925, we see NULL pointer errors,
so call dev_set_drvdata before rtc_device_register

Thomas: This should go in for 2.6.39. 

CC: Alessandro Zummo <a.zummo@...ertech.it>
CC: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Zhangfei Gao <zhangfei.gao@...vell.com>
[Reworded commit message -jstultz]
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
 drivers/rtc/rtc-max8925.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index 174036d..20494b5 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -257,6 +257,8 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
 		goto out_irq;
 	}
 
+	dev_set_drvdata(&pdev->dev, info);
+
 	info->rtc_dev = rtc_device_register("max8925-rtc", &pdev->dev,
 					&max8925_rtc_ops, THIS_MODULE);
 	ret = PTR_ERR(info->rtc_dev);
@@ -265,7 +267,6 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
 		goto out_rtc;
 	}
 
-	dev_set_drvdata(&pdev->dev, info);
 	platform_set_drvdata(pdev, info);
 
 	return 0;
-- 
1.7.3.2.146.gca209

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