linux-kernel - Re: [PATCH 1/2] dw_dmac: set CAP_PRIVATE capability for DW DMA controller

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Message-ID: <20090401103307.27c8426d@hcegtvedt>
Date:	Wed, 1 Apr 2009 10:33:07 +0200
From:	Hans-Christian Egtvedt <hans-christian.egtvedt@...el.com>
To:	Hans-Christian Egtvedt <hans-christian.egtvedt@...el.com>
Cc:	"Sosnowski, Maciej" <maciej.sosnowski@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH 1/2] dw_dmac: set CAP_PRIVATE capability for DW DMA
 controller

On Wed, 1 Apr 2009 07:04:40 +0200
Hans-Christian Egtvedt <hans-christian.egtvedt@...el.com> wrote:

> On Tue, 31 Mar 2009 15:01:49 +0100
> "Sosnowski, Maciej" <maciej.sosnowski@...el.com> wrote:

<snipp>

> > Remember however that you can leave the device generally non-private
> > and attempt as needed to allocate a channel for exclusive usage by
> > dma_request_channel()
> >
> 
> The weird part was that when testing this, the dma_request_channel()
> would not return any channel before DMA_PRIVATE flag was set. I think
> I did this some time ago, I can do a retest with the current 2.6.29
> and see how it behaves.
> 

On 2.6.29 I do not have to set the DMA_PRIVATE flag for
dma_request_channel() to work now. So I guess this patch could be
skipped.

I am quite sure I did the previous testing without any of the DMA
clients enabled. My original work was based on 2.6.29-rc3 IIRC. So I do
not really know why this was needed.

<snipp>

-- 
Best regards,
Hans-Christian Egtvedt
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