Re: [PATCH] dmaengine: of: bail out early if "dmas" property is not present

[Laurent Pinchart]

Hi Wolfram,

Thank you for the patch.

On Wednesday 14 January 2015 15:16:28 Wolfram Sang wrote:
> From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> 
> And don't print an error: not configured is not an error.
> 
> Reported-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>

This looks good to me.

Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

> ---
> 
> In response to Philipp's patch silencing the warning in the driver:
> http://patchwork.ozlabs.org/patch/425696/
> 
> I think this should be handled in the core.
> 
>  drivers/dma/of-dma.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
> index d5fbeaa1e7ba..ca31f1b45366 100644
> --- a/drivers/dma/of-dma.c
> +++ b/drivers/dma/of-dma.c
> @@ -159,6 +159,10 @@ struct dma_chan *of_dma_request_slave_channel(struct
> device_node *np, return ERR_PTR(-ENODEV);
>  	}
> 
> +	/* Silently fail if there is not even the "dmas" property */
> +	if (!of_find_property(np, "dmas", NULL))
> +		return ERR_PTR(-ENODEV);
> +
>  	count = of_property_count_strings(np, "dma-names");
>  	if (count < 0) {
>  		pr_err("%s: dma-names property of node '%s' missing or empty\n",

-- 
Regards,

Laurent Pinchart

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