linux-kernel - Re: [PATCH 4/4] dmaengine: pxa_dma: fix the maximum requestor line

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Message-ID: <20160215163524.GI19598@localhost>
Date:	Mon, 15 Feb 2016 22:05:24 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, dmaengine@...r.kernel.org
Subject: Re: [PATCH 4/4] dmaengine: pxa_dma: fix the maximum requestor line

On Thu, Feb 11, 2016 at 10:23:18PM +0100, Robert Jarzmik wrote:
> @@ -1399,13 +1405,17 @@ static int pxad_probe(struct platform_device *op)
>  		return PTR_ERR(pdev->base);
>  
>  	of_id = of_match_device(pxad_dt_ids, &op->dev);
> -	if (of_id)
> +	if (of_id) {
>  		of_property_read_u32(op->dev.of_node, "#dma-channels",
>  				     &dma_channels);
> -	else if (pdata && pdata->dma_channels)
> +		of_property_read_u32(op->dev.of_node, "#requestors",
> +				     &nb_requestors);

I think we should check the return value here. This might be err in case
when we have older DT on platform, but still should work with default in
that case

> +	} else if (pdata && pdata->dma_channels) {
>  		dma_channels = pdata->dma_channels;
> -	else
> +		nb_requestors = pdata->nb_requestors;
> +	} else {
>  		dma_channels = 32;	/* default 32 channel */
> +	}

-- 
~Vinod