linux-kernel - Re: PowerPC PCI DMA issues (prefetch/coherency?)

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Message-ID: <4A37D073.6020802@freescale.com>
Date:	Tue, 16 Jun 2009 12:03:47 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Chris Pringle <chris.pringle@...el.com>
CC:	linux-kernel@...r.kernel.org,
	"linuxppc-dev@...abs.org list" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: PowerPC PCI DMA issues (prefetch/coherency?)

Chris Pringle wrote:
> Ah right - that would explain what we're seeing then... Doh. Thought I 
> might have been onto something then. Is there any way to force a cache 
> flush? That'd at least prove it was a caching issue if it resolved the 
> problem.

You could enable CONFIG_NOT_COHERENT_CACHE.

-Scott
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