linux-kernel - Re: [PATCH] libata-core: Fix simplex handling

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Message-ID: <45E8A873.30604@garzik.org>
Date:	Fri, 02 Mar 2007 17:42:59 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Alan <alan@...rguk.ukuu.org.uk>
CC:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...l.org, torvalds@...l.org
Subject: Re: [PATCH] libata-core: Fix simplex handling

Alan wrote:
> The initial simplex handling code is fooled if you suspend and resume.
> This also causes problems with some single channel controllers which
> claim to be simplex.
> 
> The fix is fairly simple, instead of keeping a flag to remember if we
> gave away the simplex channel we remember the actual owner. As the owner
> is always part of the host_set we don't even need a refcount.
> 
> Knowing the owner also means we can reassign simplex DMA channels in
> future hotplug code etc if we need to
> 
> Signed-off-by: Alan Cox <alan@...hat.com>
> (and a signed-off for the patch I sent before while I remember)

applied


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