linux-kernel - Re: [PATCH 5/6] GenWQE Sysfs interfaces

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Date:	Wed, 27 Nov 2013 11:22:04 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Frank Haverkamp <haver@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, arnd@...db.de,
	cody@...ux.vnet.ibm.com, schwidefsky@...ibm.com,
	utz.bacher@...ibm.com, mmarek@...e.cz, rmallon@...il.com,
	jsvogt@...ibm.com, MIJUNG@...ibm.com, cascardo@...ux.vnet.ibm.com,
	michael@...ra.de
Subject: Re: [PATCH 5/6] GenWQE Sysfs interfaces

On Wed, Nov 06, 2013 at 01:45:42PM +0100, Frank Haverkamp wrote:
> +/**
> + * genwqe_init_sysfs() - Setup sysfs entries of the card device
> + */
> +int genwqe_init_sysfs(struct genwqe_dev *cd)
> +{
> +	int rc;
> +
> +	rc = sysfs_create_group(&cd->dev->kobj, &genwqe_attribute_group);
> +	if (rc)
> +		return -ENXIO;
> +
> +	return 0;
> +}

Why isn't this group the "default" one for the device?  That way you
don't have to explicitly create/remove it, the driver core handles it
all automatically for you, and you don't race with userspace when it is
created/announced.

thanks,

greg k-h
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