From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Garzik <jeff@garzik.org>
Subject: Re: Proposed changes for libata speed handling
Date: Mon, 15 Jan 2007 08:52:56 -0500
Message-ID: <45AB8738.6090405@garzik.org>
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To: Tejun Heo <htejun@gmail.com>
Cc: Alan <alan@lxorguk.ukuu.org.uk>, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
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BTW, for a solution to be complete, we need to halt all work on all 
other ports, when issuing SET FEATURES - XFER MODE.  On SiI and Promise 
controllers, possibly others, the command is snooped and side effects 
such as register setting occur.

Long standing to-do.  Currently we hack around this by serializing the 
bus probe, and preventing people from issuing SET FEATURES - XFER MODE 
from userspace.

	Jeff