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Date: Thu, 17 Apr 2008 02:23:08 +0400 (MSD)
From: "Lev A. Melnikovsky" <melnikovsky@mail.ru>
To: Oliver Neukum <oliver@neukum.org>
cc: Rene Herman <rene.herman@keyaccess.nl>,
       Alessandro Suardi <alessandro.suardi@gmail.com>,
       David Brownell <david-b@pacbell.net>,
       Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: ehci-hcd affects hda speed
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Oliver,

ON> EHCI should not scan an empty async. However this manufacturer
ON> has shown a liberal attitude about conforming with specifications.
ON> If the root hub is suspended, it can't do DMA. So it might help.
Yes, it does, thank you. No DMA when suspended. Auto-suspend is executed 
if external hub is the only attached device. Can this be used to block 
spurious schedule traversal?

Thnks
-L