Re: Multiple WMP11 prism 2 cards in one machine leads to garbled packets? Jouni, help please!

From: Jouni Malinen (
Date: 2002-09-05 17:59:01 UTC

On Thu, Sep 05, 2002 at 01:20:09PM -0400, Jason Boxman wrote:

> It sounds like bus mastering would be nice to have -- is there any indication
> from Intersil as to why they don't support it or won't acknowledge the joy
> that is bus mastering?

Not from Intersil, but since the TX part of bus mastering gets completely confused when any RX packets arrive, it shouldn't be that difficult to guess.. ;-)

Anyway, if I remember correctly, RX part worked fine. It could be quite useful to save some host CPU cycles on RX, so one could set bus_master_threshold_tx to large enough value (e.g., 3000) to avoid using bus mastering with TX, but leave it enabled for RX. This would remove time consuming I/O operations from hardware IRQ handler, so it might be quite nice improvement on systems using multiple cards. I'll try to remember to verify that this works with the CVS version.

Jouni Malinen                                            PGP id EFC895FA

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