linux-kernel - Re: [PATCH] Driver core: fix refcounting bug

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Message-ID: <20070117004549.GA18335@kroah.com>
Date:	Tue, 16 Jan 2007 16:45:49 -0800
From:	Greg KH <greg@...ah.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Kay Sievers <kay.sievers@...ell.com>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Driver core: fix refcounting bug

On Mon, Jan 08, 2007 at 11:06:44AM -0500, Alan Stern wrote:
> This patch (as832) fixes a newly-introduced bug in the driver core.
> When a kobject is assigned to a kset, it must acquire a reference to
> the kset.
> 
> Signed-off-by: Alan Stern <stern@...land.harvard.edu>
> 
> ---
> 
> The bug was introduced in Kay's "unify /sys/class and /sys/bus at 
> /sys/subsystem" patch.
> 
> I left the assignment of class_dev->kobj.parent as it was, although it is 
> not needed.  The following call to kobject_add() will end up doing the 
> same thing.
> 
> Alan Stern
> 
> P.S.: Tracking down refcounting bugs is a real pain!  I spent an entire 
> afternoon on this one...  :-(

Thanks, I've merged your patch with the one from Kay so we don't
introduce a bug along the way.

greg k-h
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