linux-kernel - Re: ehci-hcd affects hda speed

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Message-ID: <alpine.LFD.1.00.0803180317050.11560@nev.ubzr>
Date:	Tue, 18 Mar 2008 03:24:59 +0300 (MSK)
From:	"Lev A. Melnikovsky" <melnikovsky@...l.ru>
To:	David Brownell <david-b@...bell.net>
cc:	Rene Herman <rene.herman@...access.nl>,
	Alessandro Suardi <alessandro.suardi@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: ehci-hcd affects hda speed

  On Mon, 17 Mar 2008 at 11:26pm, Rene Herman wrote:

RH> And, as usual, I can not reach Lev as some mailer along the way is
RH> telling me his address is unroutable.
I'm here, don't worry :-)

  On Mon, 17 Mar 2008 at 4:00pm, David Brownell wrote:

DB> On Monday 17 March 2008, Rene Herman wrote:
DB> > +       case PCI_VENDOR_ID_VIA:
DB> > +               if (pdev->device == 0x3104 && pdev->revision >= 0x60) {
DB> Unless you have specific docs from VIA saying that this register
DB> isn't revision-specific (at least in the sense that all revisions
DB> after 0x60 define that bit in that way), this should probably be a
DB> switch on pdev->revision and just include the known-safe revisions.
May I suggest this should be a module parameter? Because a side effect is 
a USB slow-down, which may be more important for somebody...

-L
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