linux-kernel - Re: [PATCH] rtc: ep93xx: Fix 'rtc' may be used uninitialized warning

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Date:	Wed, 10 Aug 2011 15:33:15 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org, Wolfram Sang <w.sang@...gutronix.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com
Subject: Re: [PATCH] rtc: ep93xx: Fix 'rtc' may be used uninitialized
 warning

On Wed, 2011-08-10 at 21:11 +0800, Axel Lin wrote:
> commit 92d921c5d "rtc: ep93xx: Initialize drvdata before registering device"
> ensures the drvdata is initialized prior to registering the rtc device.
> But it set the drvdata to an uninitialized pointer.
> Thus calling platform_get_drvdata in ep93xx_rtc_remove does not get correct address.
> 
> This patch fixes below warning by adding struct rtc_device *rtc to struct ep93xx_rtc.
> Then set platform drvdata to ep93xx_rtc instead of rtc.
> 
>   CC      drivers/rtc/rtc-ep93xx.o
> drivers/rtc/rtc-ep93xx.c: In function 'ep93xx_rtc_probe':
> drivers/rtc/rtc-ep93xx.c:154: warning: 'rtc' may be used uninitialized in this function
> 
> Signed-off-by: Axel Lin <axel.lin@...il.com>


Thanks! I went ahead and queued this.

-john


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