linux-kernel - Re: [PATCH] sh: maple: add support for Maple controller as a joystick

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Message-ID: <20081221091637.GA23532@debian>
Date:	Sun, 21 Dec 2008 14:46:37 +0530
From:	Rabin Vincent <rabin@....in>
To:	Adrian McMenamin <adrian@...golddream.dyndns.info>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-sh <linux-sh@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>, Paul Mundt <lethal@...ux-sh.org>
Subject: Re: [PATCH] sh: maple: add support for Maple controller as a
	joystick

On Fri, Dec 19, 2008 at 11:15:42PM +0000, Adrian McMenamin wrote:
> Add support for the SEGA Dreamcast Maple controller as a joystick

[snip]

> +
> +	pad = kzalloc(sizeof(struct dc_pad), GFP_KERNEL);
> +	idev = input_allocate_device();
> +	if (!pad || !idev){
> +		error = ENOMEM;
> +		goto fail;
> +	}
> +

[snip]

> +
> +	error = input_register_device(idev);
> +	if (error)
> +		goto fail;
> +
> +	mdev->driver = mdrv;
> +	maple_set_drvdata(mdev, pad);
> +
> +	return error;
> +
> +fail:
> +	input_free_device(pad->dev);
> +	kfree(pad);
> +	maple_set_drvdata(mdev, NULL);
> +	return -error;
> +}

This will incorrectly negate the already negative error code from
input_register_device.

Rabin
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