linux-kernel - Re: [PATCH 2/9] add support for the TI VLYNQ bus

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Date:	Tue, 2 Jun 2009 12:11:45 +0100
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Florian Fainelli <florian@...nwrt.org>
Cc:	linux-kernel@...r.kernel.org, akpm <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH 2/9] add support for the TI VLYNQ bus

On Mon, Jun 01, 2009 at 01:58:27PM +0200, Florian Fainelli wrote:

> +static int vlynq_device_probe(struct device *dev)
> +{
> +	struct vlynq_device *vdev = to_vlynq_device(dev);
> +	struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
> +	struct vlynq_device_id *id = vlynq_get_drvdata(vdev);
> +	int result = -ENODEV;
> +
> +	get_device(dev);
> +	if (drv && drv->probe)
> +		result = drv->probe(vdev, id);
> +	if (result)
> +		put_device(dev);
> +	return result;
> +}

I don't think you need to increment the device reference counter here.
The caller has already done that.

> +
> +static int vlynq_device_remove(struct device *dev)
> +{
> +	struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
> +	if (drv && drv->remove)
> +		drv->remove(to_vlynq_device(dev));
> +	put_device(dev);
> +	return 0;
> +}

And this put_device I think is a bug - the caller should decrement the
reference.

  Ralf
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