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Message-ID: <40EA7A74.1000408@fh-landshut.de>
Date: Tue, 06 Jul 2004 12:09:56 +0200
From: Oliver Korpilla <okorpil@fh-landshut.de>
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To: Adrian Cox <adrian@humboldt.co.uk>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: MPC7455 DMA buffer strangeness
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Hello, Adrian!

When removing the line

vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

from my mmap() hook, DMA works as expected.

So my problem just transformed to "Differentiate mapping for Master Windows
(uncached) from mapping for DMA (cache coherent)".

Many a lot of thanks,
Oliver Korpilla

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