linux-kernel - Re: [linux-pm] [PATCH -mm] kexec jump -v9

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Message-ID: <Pine.LNX.4.44L0.0805151012150.2107-100000@iolanthe.rowland.org>
Date:	Thu, 15 May 2008 10:14:00 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
cc:	"Huang, Ying" <ying.huang@...el.com>, <nigel@...el.suspend2.net>,
	Kexec Mailing List <kexec@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-pm@...ts.linux-foundation.org>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [linux-pm] [PATCH -mm] kexec jump -v9

On Wed, 14 May 2008, Eric W. Biederman wrote:

> My take on the situation is this.  For proper handling we
> need driver device_detach and device_reattach methods.
> 
> With the following semantics.  The device_detach methods
> will disable DMA and place the hardware in a sane state
> from which the device driver can reclaim and reinitialize it,
> but the hardware will not be touched.
> 
> device_reattach reattaches the driver to the hardware.

How would these differ from the already-existing remove and probe 
methods?

Alan Stern

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