linux-kernel - Re: [PATCH] Add support for HTC Shift Touchscreen

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Date:	Sun, 18 May 2008 11:26:50 +0200
From:	Marcin Slusarz <marcin.slusarz@...il.com>
To:	Pau Oliva Fora <pau@...ack.org>
Cc:	dmitry.torokhov@...il.com, sam@...nborg.org,
	penberg@...helsinki.fi, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add support for HTC Shift Touchscreen

On Sat, May 17, 2008 at 06:38:20PM +0200, Pau Oliva Fora wrote:
> +static int __init htcpen_init(void)
> +{
> +	int err;
> +
> +	printk(KERN_INFO "htcpen: module inserted\n");
> +
> +	inb_p(HTCPEN_PORT_IRQ_CLEAR);
> +
> +	htcpen_dev = input_allocate_device();
> +	if (!htcpen_dev) {
> +		printk(KERN_ERR "htcpen: can't allocate device\n");
> +		err = -ENOMEM;
> +		goto fail1;

htcpen_dev is null here, so no need to call input_free_device

> +	}
> +
> +	htcpen_dev->name = "HTC Pen TouchScreen";
> +	htcpen_dev->id.bustype = BUS_ISA;
> +	htcpen_dev->id.vendor = 0;
> +	htcpen_dev->id.product = 0;
> +	htcpen_dev->id.version = 0;
> +
> +	input_set_abs_params(htcpen_dev, ABS_X, 0, X_AXIS_MAX, 0, 0);
> +	input_set_abs_params(htcpen_dev, ABS_Y, 0, Y_AXIS_MAX, 0, 0);
> +
> +	htcpen_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
> +	htcpen_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
> +	htcpen_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
> +
> +	err = request_irq(HTCPEN_IRQ, htcpen_interrupt, 0, "htcpen",
> +		htcpen_dev);
> +	if (err) {
> +		printk(KERN_ERR "htcpen: irq busy\n");
> +		err = -EBUSY;
> +		goto fail1;
> +	}
> +
> +	err = input_register_device(htcpen_dev);
> +	if (err)
> +		goto fail2;
> +
> +	outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT);
> +
> +	return 0;
> +
> + fail2:	free_irq(HTCPEN_IRQ, htcpen_dev);
> + fail1:	input_free_device(htcpen_dev);
> +	return err;
> +}
> +
> +static void __exit htcpen_exit(void)
> +{
> +	input_unregister_device(htcpen_dev);
> +	free_irq(HTCPEN_IRQ, htcpen_dev);

input_free_device ?

> +	printk(KERN_INFO "htcpen: module removed\n");
> +}

Marcin
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