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Re: [PATCH, RESEND] Add MWI workaround for Tulip DC21143

Subject: Re: [PATCH, RESEND] Add MWI workaround for Tulip DC21143
From: Martin Michlmayr <>
Date: Mon, 6 Mar 2006 22:51:31 +0000
In-reply-to: <>
Original-recipient: rfc822;
References: <> <>
Resent-date: Tue, 7 Mar 2006 03:48:51 +0000
Resent-message-id: <>
User-agent: Mutt/1.5.9i
* Peter Horton <> [2006-02-18 22:08]:
> This patch works around the MWI bug on the DC21143 rev 65 Tulip by
> ensuring that the receive buffers don't end on a cache line boundary (as
> documented in the errata).
> This patch is required for the MIPs based Cobalt Qube/RaQ as supporting
> the extra PCI commands seems to reduce the chance of a hard lockup
> between the Tulip and the PCI bridge.

Does anyone have comments regarding this patch?  I received
confirmation from a number of Debian users that this patch
significantly improves the lockup situation on Cobalt, so
it would be nice if it could go in.
Martin Michlmayr

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