linux-kernel - Re: [PATCH] ARM: ux500: set coherent_dma

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Date:	Mon, 17 Jun 2013 17:42:48 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Fabio Baltieri <fabio.baltieri@...aro.org>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Srinidhi Kasagar <srinidhi.kasagar@...ricsson.com>,
	Vinod Koul <vinod.koul@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: ux500: set coherent_dma_mask for dma40

On Thu, Jun 13, 2013 at 3:56 PM, Fabio Baltieri
<fabio.baltieri@...aro.org> wrote:

> Set coherent_dma_mask to DMA_BIT_MASK(32) for dma40 platform_device, as
> without this DMA allocations were failing with the error:
>
> dma40 dma40.0: coherent DMA mask is unset
>
> when booting without device-tree.
>
> Signed-off-by: Fabio Baltieri <fabio.baltieri@...aro.org>
> ---
>
> Hi Linus, Lee,
>
> I found this while removing the last hack I was keeping in my ASoC tree.
> I originally thought that I had to set this on the driver's pdata, but
> it turns out it's needed on the DMA controller one instead.
>
> When booting with device-tree enabled the mask seems to be set
> automatically.
>
> Would you consider applying this with the other dma40 patches?

Those are now upstream in the ARM SoC tree, you'd have to send it
to arm@...nel.org and ask Olof/Arnd to apply it directly to
the next/drivers branch (I think).

I have also queued it on ux500-fixes so it won't be lost.

Yours,
Linus Walleij
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