From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: scottwood@freescale.com, chris.pringle@oxtel.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
arnd@arndb.de
Subject: Re: PowerPC PCI DMA issues (prefetch/coherency?)
Date: Wed, 17 Jun 2009 11:07:30 +1000 [thread overview]
Message-ID: <1245200850.21602.1.camel@pasglop> (raw)
In-Reply-To: <20090617093654B.fujita.tomonori@lab.ntt.co.jp>
On Wed, 2009-06-17 at 09:37 +0900, FUJITA Tomonori wrote:
>
> dma_cache_sync is supposed to be used only with the buffers that
> dma_alloc_noncoherent() returns. On architecutures that maps
> dma_alloc_noncoherent to dma_alloc_coherent, dma_cache_sync() is
> supposed to be NOP.
>
Or at least a sync() on powerpc but yeah, I see. We should probably do
that.
Cheers,
Ben.
next prev parent reply other threads:[~2009-06-17 1:09 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4A37A503.3030209@oxtel.com>
[not found] ` <20090616162114.GA5051@loki.buserror.net>
[not found] ` <4A37C97A.5050508@oxtel.com>
2009-06-16 16:46 ` PowerPC PCI DMA issues (prefetch/coherency?) Scott Wood
2009-06-16 16:57 ` Chris Pringle
2009-06-16 17:03 ` Scott Wood
2009-06-16 17:43 ` Arnd Bergmann
2009-06-16 17:49 ` Scott Wood
2009-06-16 18:02 ` Arnd Bergmann
2009-06-17 0:18 ` Benjamin Herrenschmidt
2009-06-17 0:37 ` FUJITA Tomonori
2009-06-17 0:56 ` Leon Woestenberg
2009-06-17 1:08 ` Benjamin Herrenschmidt
2009-06-17 1:13 ` Leon Woestenberg
2009-06-17 1:07 ` Benjamin Herrenschmidt [this message]
2009-06-17 7:58 ` Chris Pringle
2009-06-17 13:18 ` Chris Pringle
2009-06-18 11:24 ` Chris Pringle
2009-06-22 14:31 ` AW: " Sergej.Stepanov
2009-06-29 8:11 ` Chris Pringle
2009-06-16 14:08 Chris Pringle
2009-06-16 15:48 ` Roderick Colenbrander
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