linux-kernel - Re: [PATCH try #4] Input/Joystick Driver: add support AD7142 joystick driver

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Date:	Wed, 17 Oct 2007 12:12:38 -0400
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	bryan.wu@...log.com
Cc:	"Andrey Panin" <pazke@...pac.ru>, "Roel Kluin" <12o3l@...cali.nl>,
	"Ahmed S. Darwish" <darwish.07@...il.com>,
	linux-input@...ey.karlin.mff.cuni.cz,
	linux-joystick@...ey.karlin.mff.cuni.cz,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	"Jean Delvare" <khali@...ux-fr.org>
Subject: Re: [PATCH try #4] Input/Joystick Driver: add support AD7142 joystick driver

Hi Bryan,

On 10/17/07, Bryan Wu <bryan.wu@...log.com> wrote:
> Subject: [PATCH try #4] Input/Joystick Driver: add support AD7142 joystick driver
>

My comments are in addition to Jean's:

> +
> +static void ad7142_close(struct input_dev *dev)
> +{
> +       struct ad7142_data *data = input_get_drvdata(dev);
> +       struct i2c_client *client = &data->client;
> +       unsigned short value;
> +

I think you need disable_irq() here

> +       flush_scheduled_work();
> +
> +       /*
> +        * Turn AD7142 to full shutdown mode
> +        * No CDC conversions
> +        */
> +       value = 0x0001;
> +       ad7142_i2c_write(client, PWRCONVCTL, &value, 1);

and enable_irq() here. This way you can be sure that you will not
re-arm the work between flush_scheduled_work() and shutting off the
controller.

> +
> +static int ad7142_attach(struct i2c_adapter *adap)
> +{
> +       return i2c_probe(adap, &addr_data, &ad7142_probe);
> +}
> +
> +static int ad7142_detach(struct i2c_client *client)
> +{
> +       int rc;
> +
> +       free_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX, ad7142_interrupt);
> +
> +       flush_scheduled_work();
> +
> +       rc = i2c_detach_client(client);
> +       if (!rc)
> +               kfree(i2c_get_clientdata(client));
> +       return rc;
> +}
> +
> +
> +static int __init ad7142_init(void)
> +{
> +       return i2c_add_driver(&ad7142_driver);
> +}
> +
> +static void __exit ad7142_exit(void)
> +{
> +       i2c_del_driver(&ad7142_driver);
> +}
> +
> +module_init(ad7142_init);
> +module_exit(ad7142_exit);

Where did input_unregister_device() go? It still needs to be somewhere...

-- 
Dmitry
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