linux-kernel - Re: [PATCH] Fujitsu application panel driver

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Message-Id: <200710280130.16002.dtor@insightbb.com>
Date:	Sun, 28 Oct 2007 01:30:15 -0400
From:	Dmitry Torokhov <dtor@...ightbb.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	Pavel Machek <pavel@....cz>, Len Brown <lenb@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-input@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fujitsu application panel driver

Hi Stephen,

On Tuesday 23 October 2007 15:55, Stephen Hemminger wrote:
> +
> +static int apanel_setkeycode(struct input_dev *idev, int scancode, int keycode)
> +{
> +	struct apanel *ap = idev->private;
> +
> +	if (keycode < 0 || keycode > KEY_MAX)
> +		return -EINVAL;
> +
> +	if (scancode < 0 || scancode >= MAX_PANEL_KEYS)
> +		return -EINVAL;

scancode >= idev->keycodemax is prbably better here - we don't want to
allow setting keycode for unsupported buttons.

> +
> +	clear_bit(ap->keymap[scancode], idev->keybit);

This will not work if one has same code assigned to 2 buttons. Pretty
degenerate case, I know...

> +	ap->keymap[scancode] = keycode;
> +	set_bit(keycode, idev->keybit);
> +	return 0;
> +}

-- 
Dmitry
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