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

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Date:	Tue, 17 Feb 2009 13:27:48 -0500
From:	Mike Murphy <mamurph@...clemson.edu>
To:	Greg KH <greg@...ah.com>
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 11:57 PM, Mike Murphy <mamurph@...clemson.edu> wrote:
> Unless that is some common error that is obvious from its description,
> I will have to chase the bug down tomorrow or Wednesday. It's getting
> a bit late here.
>

Fixed... the function signature was wrong. Should have been:

static ssize_t xpad_show_dead_zone(struct device *dev, struct
device_attribute *attr, char *buf)

Incidentally, both Documentation/driver-model/device.txt and
Documentation/filesystems/sysfs.txt appear to be wrong. The former
defines the device attribute structure as:

struct device_attribute {
        struct attribute        attr;
        ssize_t (*show)(struct device * dev, char * buf, size_t count,
loff_t off);
        ssize_t (*store)(struct device * dev, const char * buf, size_t
count, loff_t off);
};

while the latter (that I followed last night) defines it as:

struct device_attribute {
        struct attribute        attr;
        ssize_t (*show)(struct device * dev, char * buf);
        ssize_t (*store)(struct device * dev, const char * buf);
};

I finally got the correct one out of include/linux/device.h:

struct device_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct device *dev, struct device_attribute *attr,
			char *buf);
	ssize_t (*store)(struct device *dev, struct device_attribute *attr,
			 const char *buf, size_t count);
};

Thanks,
Mike
-- 
Mike Murphy
Ph.D. Candidate and NSF Graduate Research Fellow
Clemson University School of Computing
120 McAdams Hall
Clemson, SC 29634-0974 USA
Tel: +1 864.656.2838   Fax: +1 864.656.0145
http://cirg.cs.clemson.edu/~mamurph
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