diff options
Diffstat (limited to 'drivers/iio/industrialio-event.c')
| -rw-r--r-- | drivers/iio/industrialio-event.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index 894d8137c4cf..cae332b1d7ea 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 */ static unsigned int iio_event_poll(struct file *filep, struct poll_table_struct *wait) @@ -84,7 +90,7 @@ static unsigned int iio_event_poll(struct file *filep, unsigned int events = 0; if (!indio_dev->info) - return -ENODEV; + return events; poll_wait(filep, &ev_int->wait, wait); |