linux-kernel - Re: [PATCH v2]vt: fix potential dual con

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Message-ID: <20140109043349.GB28887@kroah.com>
Date:	Wed, 8 Jan 2014 20:33:49 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Wang YanQing <udknight@...il.com>, jslaby@...e.cz,
	airlied@...hat.com, akpm@...ux-foundation.org, kilobyte@...band.pl,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2]vt: fix potential dual con_driver register for
 conswitchp

On Mon, Dec 30, 2013 at 11:21:18AM +0800, Wang YanQing wrote:
> We should check whether conswitchp is registered before
> add it to registered_con_driver in con_init, or it will
> cause dual con_driver register for conswitchp.
> 
> Although I haven't met it in reality, but I think it could
> happen for Embeded devices, who register platform con_driver
> earlier than call con_init.

Does that happen on those systems?  Let's not add code that's never
going to be use, and is not needed, right?

thanks,

greg k-h
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