linux-kernel - Re: [PATCH] input: xpad.c - Xbox 360 wireless and sysfs support

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Message-ID: <20090217031813.GD8343@kroah.com>
Date:	Mon, 16 Feb 2009 19:18:13 -0800
From:	Greg KH <greg@...ah.com>
To:	Mike Murphy <mamurph@...clemson.edu>
Cc:	Oliver Neukum <oliver@...kum.org>, linux-usb@...r.kernel.org,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] input: xpad.c - Xbox 360 wireless and sysfs support

On Mon, Feb 16, 2009 at 09:53:54PM -0500, Mike Murphy wrote:
> struct usb_xpad {
> 	struct input_dev *dev;		/* input device interface */
> 	struct usb_device *udev;	/* usb device */
> ...
> };
> 
> This is not my code... it was set up this way in the stable xpad driver.

And it is correct :)

> So it looks like I'm stuck with a struct input_dev * pointer to the
> input device, a struct device * pointer in the show/store handlers,
> and no way to get back to struct usb_xpad * with the container_of
> macro. Unless, of course, there is something I don't know about
> container_of (or another macro I can use in this instance).

input_set_drvdata() and input_get_drvdata() is what you are looking for.

Hope this helps,

greg k-h
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