linux-kernel - Re: [PATCH 3/9] Input: pixcir_i2c_ts: Initialize interrupt mode and power mode

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Date:	Thu, 19 Dec 2013 11:27:13 +0530
From:	Roger Quadros <rogerq@...com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	<rydberg@...omail.se>, <jcbian@...cir.com.cn>,
	<linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>
Subject: Re: [PATCH 3/9] Input: pixcir_i2c_ts: Initialize interrupt mode and
 power mode

On 12/18/2013 07:44 PM, Dmitry Torokhov wrote:
> On Wed, Dec 18, 2013 at 02:51:14PM +0530, Roger Quadros wrote:
>> +
>> +static int pixcir_stop(struct pixcir_i2c_ts_data *ts)
>> +{
>> +	struct device *dev = &ts->client->dev;
>> +	int ret;
>> +
>> +	/* disable interrupt generation */
>> +	ret = pixcir_int_enable(ts, 0);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to disable interrupt generation\n");
>> +		return ret;
>> +	}
>> +
>> +	disable_irq(ts->client->irq);
> 
> Why do you need to disable IRQ? If you disable interrupt generation in
> the chip I think you only need to call synchronize_irq() to make sure
> it's completed if it happens to be running. Also you need to move the
> code:

Agreed, no need to call disable_irq().

> 
> 	tsdata->exiting = true;
> 	mb();
> 
> here from pixcir_i2c_ts_remove() to make sure handler exits promptly.
> 
> You will also need to reset tsdata->exiting in your start method.
> 

OK.

cheers,
-roger
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