linux-kernel - Re: kexec reboot broken with ioatdma?

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Message-ID: <20091216234529.GB22449@verge.net.au>
Date:	Thu, 17 Dec 2009 10:45:29 +1100
From:	Simon Horman <horms@...ge.net.au>
To:	Roland Dreier <rdreier@...co.com>
Cc:	linux-kernel@...r.kernel.org,
	Dan Williams <dan.j.williams@...el.com>,
	kexec@...ts.infradead.org
Subject: Re: kexec reboot broken with ioatdma?

On Wed, Dec 16, 2009 at 03:42:20PM -0800, Roland Dreier wrote:
> 
>  > If its reset in a standard path, then yes that seems sensible to me.
>  > I'm mainly concerned about avoiding something along the lines of:
>  > 
>  > 	if (is_booting_from_kexec)
>  > 		reset_hw();
> 
> I think we all agree... the idea is to change from
> 
> 	init_hw()
> 	{
> 		/* assume hw is in pristine state */
> 		do_init();
> 	}
> 
> to
> 
> 	init_hw()
> 	{
> 		/* hw is in unknown state */
> 		reset_hw();
> 		do_init();
> 	}
> 
>  - R.

Yes, I think we all agree :-)

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