linux-kernel - Re: [RFC PATCH 2/3] eeprom: sunxi: Move the SID driver to the eeprom framework

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Message-ID: <20150220174750.GJ8656@n2100.arm.linux.org.uk>
Date:	Fri, 20 Feb 2015 17:47:50 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>, Pawel Moll <pawel.moll@....com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-api@...r.kernel.org, broonie@...nel.org,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: Re: [RFC PATCH 2/3] eeprom: sunxi: Move the SID driver to the eeprom
 framework

On Thu, Feb 19, 2015 at 05:08:40PM +0000, Srinivas Kandagatla wrote:
> +static int sunxi_sid_probe(struct platform_device *pdev)
> +{
> +	const struct of_device_id *device;
> +	struct eeprom_sid *sid;
> +	struct resource *res;
> +	struct eeprom_device *eeprom;
> +	struct device *dev = &pdev->dev;
> +	int rval;
> +
> +	sid = devm_kzalloc(dev, sizeof(*sid), GFP_KERNEL);
> +	if (!sid)
> +		return -ENOMEM;
> +
> +	eeprom = &sid->eeprom;
...
> +	rval = eeprom_register(eeprom);
> +	if (rval)
> +		return rval;
...
> +static int sunxi_sid_remove(struct platform_device *pdev)
> +{
> +	struct eeprom_device *eeprom = platform_get_drvdata(pdev);
> +
> +	return eeprom_unregister(eeprom);

As pointed out in the previous patch, this is unsafe as the eeprom
structure contains a struct device.

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