linux-kernel - Re: [PATCH 04/10] net: stmmac: sunxi platfrom extensions for GMAC in Allwinner A20 SoC's

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Message-ID: <52A5C950.7070903@cogentembedded.com>
Date:	Mon, 09 Dec 2013 17:44:48 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	srinivas kandagatla <srinivas.kandagatla@...com>,
	Chen-Yu Tsai <wens@...e.org>
CC:	devicetree@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	linux-sunxi@...glegroups.com,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 04/10] net: stmmac: sunxi platfrom extensions for GMAC
 in Allwinner A20 SoC's

Hello.

On 09-12-2013 15:21, srinivas kandagatla wrote:

>> +static int sun7i_gmac_init(struct platform_device *pdev)
>> +{
>> +	struct resource *res;
>> +	struct device *dev = &pdev->dev;
>> +	void __iomem *addr = NULL;
>> +	struct plat_stmmacenet_data *plat_dat = NULL;

    No need to initialize it since you're assigning to it right below.

>> +	u32 priv_clk_reg;
>> +
>> +	plat_dat = dev_get_platdata(&pdev->dev);
>> +	if (!plat_dat)
>> +		return -EINVAL;

> dev_get_platdata will return NULL for DT, So this function will fail all
> the time.

    Indeed, unless the probe() method assigns it from the 'data' field of
'struct of_device_id'.

> How is it supposed to work?
> Am I missing some thing?

    Look at stmmac_pltfr_probe().

> --srini

WBR, Sergei

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