I can't to find devm_iio_device_alloc() in my kernel v3.11-rc1
On Mon, Jul 15, 2013 at 3:35 PM, Lars-Peter Clausen <lars@xxxxxxxxxx> wrote:
> On 07/15/2013 02:27 PM, Oleksandr Kravchenko wrote:
>> Thank you for review! But I don't completely understand one of your comment:
>>
>>>> +static int als_probe(struct i2c_client *client, const struct i2c_device_id *id)
>> [...]
>>>> + if (client->irq) {
>>>> + ret = devm_request_threaded_irq(&client->dev, client->irq,
>>>> + NULL, als_interrupt_handler,
>>>> + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
>>>> + ALS_IRQ_NAME, indio_dev);
>>>
>>> This is a bit racy, you access memory in the irq handler that is freed
>>> before the irq is freed.
>>
>> Do you mean than that indio_dev may be used in interrupt handler after
>> iio_device_free(indio_dev) called in als_remove() function?
>>
>> If so, can I use disable_irq() in als_remove() before iio_device_free()
>> to avoid this problem?
>>
>
> Just add a devm_iio_device_alloc() and use that, instead of trying to bodch
> around the issue.
>
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Oleksandr Kravchenko
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