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

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Message-ID: <47DF1A7E.30809@keyaccess.nl>
Date:	Tue, 18 Mar 2008 02:27:26 +0100
From:	Rene Herman <rene.herman@...access.nl>
To:	"Lev A. Melnikovsky" <melnikovsky@...l.ru>
CC:	David Brownell <david-b@...bell.net>,
	Alessandro Suardi <alessandro.suardi@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: ehci-hcd affects hda speed

On 18-03-08 01:24, Lev A. Melnikovsky 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...

If the 10us is a EHCI specification, I'd personally think not. But if need 
be...

Rene.
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