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

To: netdev@vger.kernel.org, linux-mips@linux-mips.org
Subject: Re: [PATCH, RESEND] Add MWI workaround for Tulip DC21143
From: Martin Michlmayr <tbm@cyrius.com>
Date: Mon, 6 Mar 2006 22:51:31 +0000
In-reply-to: <20060218220851.GA1601@colonel-panic.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20060129230816.GD4094@colonel-panic.org> <20060218220851.GA1601@colonel-panic.org>
Resent-date: Tue, 7 Mar 2006 03:48:51 +0000
Resent-from: tbm@cyrius.com
Resent-message-id: <20060307034851.GB29936@unjust.cyrius.com>
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* Peter Horton <pdh@colonel-panic.org> [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
tbm@cyrius.com

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