Hi Dmitry,
On 04/30/2014 07:29 PM, Dmitry Torokhov wrote:
> Hi Roger,
>
> On Wed, Apr 30, 2014 at 03:36:27PM +0300, Roger Quadros wrote:
>> +static int pixcir_stop(struct pixcir_i2c_ts_data *ts)
>> +{
>> + struct device *dev = &ts->client->dev;
>> + int ret;
>> +
>> + /* exit ISR if running, no more report parsing */
>> + ts->exiting = true;
>> + mb(); /* update status before we synchronize irq */
>> +
>> + /* disable ISR from running again */
>> + disable_irq(ts->client->irq);
>> +
>> + /* wait till running ISR complete */
>> + synchronize_irq(ts->client->irq);
>> +
>> + /* disable interrupt generation */
>> + ret = pixcir_int_enable(ts, 0);
>> + if (ret)
>> + dev_err(dev, "Failed to disable interrupt generation\n");
>> +
>> + /* restore IRQ */
>> + enable_irq(ts->client->irq);
>> +
>> + return ret;
>
> Should not this be:
>
> pixcir_int_enable(ts, 0);
> ts->exiting = true;
> mb();
> synchronize_irq(ts->client->irq);
>
> Why do we also need to disable/enable irq?
Yes, you are right. It seems the problem with v2 was that order of mb() and synchronize_irq() were
reversed and thus causing the suspend/resume problem. I tried with your suggestion and it works.
I'll send a revised series.
>
> By the way, disable_irq() implies synchronize_irq().
OK.
cheers,
-roger
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