linux-kernel - Re: crash on CONFIG_CFAG12864B=y in 2.6.20-rc3-mm1

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Message-Id: <1170350433.9781.200.camel@imap.mvista.com>
Date:	Thu, 01 Feb 2007 09:20:33 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	Miguel Ojeda <maxextreme@...il.com>
Cc:	akpm@...l.org, linux-kernel@...r.kernel.org
Subject: Re: crash on CONFIG_CFAG12864B=y in 2.6.20-rc3-mm1

On Thu, 2007-02-01 at 18:13 +0100, Miguel Ojeda wrote:

> >
> >
> 
> Well, I use the word "module" for both cases: When I modprobe
> cfag12864b, if ks0108 fails, it doesn't get linked. So I thought the
> same happen for built-in drivers (in other words, I didn't think
> cfag12864b would be linked if ks0108 failed).
> 
> So I'm waiting until someone tell me what is the right way to avoid
> drivers like cfag12864b been inited if their dependencies failed.
> 
> Anyway, thanks for discovering the bug (I wouldn't have discovered it
> as my motherboard has parallel port ;).

I have a parallel port, but I don't have the cfag12864b or ks0108 .. I
think the simplest way to fix it would be to add a flag to ks0108 that
signals successful initialization , then force cfag12864b to check for
that ..

I found this by booting a make allyesconfig kernel ..

Daniel

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