linux-kernel - Re: [PATCH 2/2] hwrng: msm: Add PRNG support for MSM SoC's

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Message-ID: <524EEEC5.7090803@codeaurora.org>
Date:	Fri, 04 Oct 2013 09:37:25 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Stanimir Varbanov <svarbanov@...sol.com>
CC:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Matt Mackall <mpm@...enic.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	linux-kernel@...r.kernel.org, Rob Landley <rob@...dley.net>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/2] hwrng: msm: Add PRNG support for MSM SoC's

On 10/04/13 09:31, Stanimir Varbanov wrote:
>
>>> +static int msm_rng_probe(struct platform_device *pdev)
>>> +{
>>> +	struct msm_rng *rng;
>>> +	struct device_node *np;
>>> +	struct resource res;
>>> +	int ret;
>>> +
>>> +	np = of_node_get(pdev->dev.of_node);
>>> +	if (!np)
>>> +		return -ENODEV;
>> This is unnecessary.
> I used this call because CONFIG_OF_DYNAMIC could be enabled at some
> time. Isn't that possible? I saw that of_node_get|put is used in .probe
> on few places in drivers.

So far we aren't selecting that config on ARM.

If you look at of_device_alloc() you'll see

    dev->dev.of_node = of_node_get(np);

so any platform devices created from of_platform_populate won't have
their of_node go away.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

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