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From: Piotr =?iso-8859-2?q?Zi=EAcik?= <kosmo@semihalf.com>
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To: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Thu, 9 Jul 2009 17:23:12 +0200
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Cc: freebsd-arm@freebsd.org, freebsd-usb@freebsd.org, thompsa@freebsd.org
Subject: Re: CPU Cache and busdma usage in USB
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Wednesday 08 July 2009 12:30:46 Sebastian Huber napisa=B3(a):
> Device to memory DMA transfer of a buffer:
> (...)
> 3. all accesses to the buffer via the cache must wait until the DMA has
> finished

And this is the problem in my oppinion - USB stack does not wait.

=2D-=20
Best Regards.
Piotr Zi=EAcik