linux-kernel - Re: [PATCH] dmaengine: Add DMA

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Date:	Mon, 20 Jan 2014 10:01:04 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Florian Meier <florian.meier@...lo.de>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	linux-rpi-kernel <linux-rpi-kernel@...ts.infradead.org>,
	dmaengine <dmaengine@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH] dmaengine: Add DMA_PRIVATE to BCM2835 driver

On Fri, Jan 17, 2014 at 06:06:29PM +0100, Florian Meier wrote:
> Without DMA_PRIVATE the driver is not able to allocate more than one channel.
> Since it uses dma_get_any_slave_channel that calls private_candidate,
> the second allocation fails at
> /* some channels are already publicly allocated */
> Maybe it should be fixed in the core, but at least this fixes the bug.
> 
> Signed-off-by: Florian Meier <florian.meier@...lo.de>
> ---
>  drivers/dma/bcm2835-dma.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
> index 6ae0708..a036021 100644
> --- a/drivers/dma/bcm2835-dma.c
> +++ b/drivers/dma/bcm2835-dma.c
> @@ -611,6 +611,7 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
>  	od->base = base;
>  
>  	dma_cap_set(DMA_SLAVE, od->ddev.cap_mask);
> +	dma_cap_set(DMA_PRIVATE, od->ddev.cap_mask);
>  	dma_cap_set(DMA_CYCLIC, od->ddev.cap_mask);
>  	od->ddev.device_alloc_chan_resources = bcm2835_dma_alloc_chan_resources;
>  	od->ddev.device_free_chan_resources = bcm2835_dma_free_chan_resources;

Applied, thanks

--
~Vinod
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