return rv;
}
+static __poll_t
+line6_hwdep_poll(struct snd_hwdep *hwdep, struct file *file, poll_table *wait)
+{
+ __poll_t rv;
+ struct usb_line6 *line6 = hwdep->private_data;
+
+ poll_wait(file, &line6->messages.wait_queue, wait);
+
+ mutex_lock(&line6->messages.read_lock);
+ rv = kfifo_len(&line6->messages.fifo) == 0 ? 0 : EPOLLIN | EPOLLRDNORM;
+ mutex_unlock(&line6->messages.read_lock);
+
+ return rv;
+}
+
static const struct snd_hwdep_ops hwdep_ops = {
.open = line6_hwdep_open,
.release = line6_hwdep_release,
.read = line6_hwdep_read,
.write = line6_hwdep_write,
+ .poll = line6_hwdep_poll,
};
/* Insert into circular buffer */