linux-kernel - Re: [PATCH v2] dw_dmac: allocate dma descriptors from DMA

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Date:	Sun, 20 Jan 2013 20:50:30 -0800
From:	Vinod Koul <vinod.koul@...el.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.jf.intel.com>
Cc:	Viresh Kumar <viresh.linux@...il.com>,
	linux-kernel@...r.kernel.org, spear-devel <spear-devel@...t.st.com>
Subject: Re: [PATCH v2] dw_dmac: allocate dma descriptors from DMA_COHERENT
 memory

On Wed, Jan 16, 2013 at 03:48:50PM +0200, Andy Shevchenko wrote:
> Currently descriptors are allocated from normal cacheable memory and that slows
> down filling the descriptors, as we need to call cache_coherency routines
> afterwards. It would be better to allocate memory for these descriptors from
> DMA_COHERENT memory. This would make code much cleaner too.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Tested-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
Applied Thanks

--
~Vinod
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