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Date: Tue, 14 Feb 2017 13:24:19 +0530
From: Vinod Koul <vinod.koul@intel.com>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Dan Williams <dan.j.williams@intel.com>,
        Magnus Damm <magnus.damm@gmail.com>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        Niklas =?iso-8859-1?Q?S=F6derlund?=
        <niklas.soderlund+renesas@ragnatech.se>, dmaengine@vger.kernel.org,
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Subject: Re: [PATCH v2] dmaengine: rcar-dmac: Widen DMA mask to 40 bits
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On Mon, Feb 13, 2017 at 12:00:26PM +0100, Geert Uytterhoeven wrote:
> By default, the DMA mask covers only the low 32-bit address space, which
> causes SWIOTLB on arm64 to fall back to a bounce buffer for DMA
> transfers involving memory outside the 32-bit address space.
> 
> The R-Car DMA controller hardware supports a 40-bit address space, hence
> widen the DMA mask to 40 bits to actually make use of this feature.

Applied, thanks

-- 
~Vinod