linux-kernel - Re: [PATCH v2] dmaengine: rcar-dmac: enable descriptor mode on 40bit

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Date:   Wed, 8 Mar 2017 09:17:32 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:     Vinod Koul <vinod.koul@...el.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        dmaengine@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] dmaengine: rcar-dmac: enable descriptor mode on 40bit

On Wed, Mar 8, 2017 at 1:42 AM, Kuninori Morimoto
<kuninori.morimoto.gx@...esas.com> wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
>
> SYS-DMAC can use 40bit address transfer, and it supports Descriptor
> Mode too. Current SYS-DMAC driver disables Descriptor Mode if it was
> 40bit address today. But it can use Descriptor Mode with 40bit if
> transfer Source/Destination address are located in same 4GiB region
> in the 40 bit address space.
> This patch enables it if all condition was clear
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds