On 08/02/2015 09:43 PM, Hartmut Knaack wrote:
> Jonathan Cameron schrieb am 02.08.2015 um 19:33:
>> On 24/07/15 14:21, Cristina Opriceana wrote:
>>> Fix kernel docs warnings by adding the missing fields,
>>> each with its associated description.
>>>
>>> Signed-off-by: Cristina Opriceana <cristina.opriceana@xxxxxxxxx>
>> Applied. Thanks
>>
>> Jonathan
>>> ---
>>> drivers/iio/industrialio-event.c | 6 ++++++
>>> 1 file changed, 6 insertions(+)
>>>
>>> diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
>>> index 894d813..b2f63f9 100644
>>> --- a/drivers/iio/industrialio-event.c
>>> +++ b/drivers/iio/industrialio-event.c
>>> @@ -32,6 +32,7 @@
>>> * @dev_attr_list: list of event interface sysfs attribute
>>> * @flags: file operations related flags including busy flag.
>>> * @group: event interface sysfs attribute group
>>> + * @read_lock: lock to protect kfifo read operations
>>> */
>>> struct iio_event_interface {
>>> wait_queue_head_t wait;
>>> @@ -75,6 +76,11 @@ EXPORT_SYMBOL(iio_push_event);
>>>
>>> /**
>>> * iio_event_poll() - poll the event queue to find out if it has data
>>> + * @filep: File structure pointer to identify the device
>>> + * @wait: Poll table pointer to add the wait queue on
>>> + *
>>> + * Return: (POLLIN | POLLRDNORM) if data is available for reading
>>> + * or a negative error code on failure
>
> This can also return 0 if no data is available.
>
> Actually, being unsigned int, the intended negative error code won't
> appear - ouch! Any volunteers to address this issue?
Sorry, my fault. It looks like the poll() callback can't return a error. So
if no device is bound we should just return 0.
- Lars
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