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Date:      Fri, 21 Nov 2003 21:29:50 +0100
From:      Bernd Walter <ticso@cicely12.cicely.de>
To:        "Brian F. Feldman" <green@freebsd.org>
Cc:        current@freebsd.org
Subject:   Re: kernel panic trying to utilize a da(4)/umass(4) device with ohci(4)
Message-ID:  <20031121202949.GE74178@cicely12.cicely.de>
In-Reply-To: <200311211735.hALHZos7009639@green.bikeshed.org>
References:  <20031121090802.Y57910@carver.gumbysoft.com> <200311211735.hALHZos7009639@green.bikeshed.org>

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On Fri, Nov 21, 2003 at 12:35:50PM -0500, Brian F. Feldman wrote:
> Doug White <dwhite@gumbysoft.com> wrote:
> > The OHCI driver is largely synced with NetBSD so you might see if they
> > have the same bug.
> 
> I'll look around for a bootable NetBSD CD.

NetBSD is different in that point.

> > This might be the underlying wierdness we were seeing in gtetlow's
> > microdrive with transfers over 8k.  The one-page-crossing ohci limitation
> > is really annoying.
> 
> Is there a way to add a quirk for max 8k transfers or anything?  Even though 
> that would be patently lame, I'd like to get some sort of workaround here.  
> I don't even know what is supposed to be the problem here -- the fact that 
> it's an ohci controller, an ohci+ehci controller, or that it's some specific 
> controller issue...

We never did any page crossing on ohci/ehci bevor the newbus change
took place.

-- 
B.Walter                   BWCT                http://www.bwct.de
ticso@bwct.de                                  info@bwct.de



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