/**
* mei_poll - the poll function
*
* @file: pointer to file structure
* @wait: pointer to poll_table structure
*
* returns poll mask
*/
static unsigned int mei_poll(struct file *file, poll_table *wait)
{
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
if (WARN_ON(!cl || !cl->dev))
return mask;
dev = cl->dev;
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED)
goto out;
if (cl == &dev->iamthif_cl) {
mask = mei_amthif_poll(dev, file, wait);
goto out;
}
mutex_unlock(&dev->device_lock);
poll_wait(file, &cl->tx_wait, wait);
mutex_lock(&dev->device_lock);
if (MEI_WRITE_COMPLETE == cl->writing_state)
mask |= (POLLIN | POLLRDNORM);
out:
mutex_unlock(&dev->device_lock);
return mask;
}
/**
* mei_poll - the poll function
*
* @file: pointer to file structure
* @wait: pointer to poll_table structure
*
* Return: poll mask
*/
static unsigned int mei_poll(struct file *file, poll_table *wait)
{
unsigned long req_events = poll_requested_events(wait);
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
bool notify_en;
if (WARN_ON(!cl || !cl->dev))
return POLLERR;
dev = cl->dev;
mutex_lock(&dev->device_lock);
notify_en = cl->notify_en && (req_events & POLLPRI);
if (dev->dev_state != MEI_DEV_ENABLED ||
!mei_cl_is_connected(cl)) {
mask = POLLERR;
goto out;
}
if (notify_en) {
poll_wait(file, &cl->ev_wait, wait);
if (cl->notify_ev)
mask |= POLLPRI;
}
if (cl == &dev->iamthif_cl) {
mask |= mei_amthif_poll(file, wait);
goto out;
}
if (req_events & (POLLIN | POLLRDNORM)) {
poll_wait(file, &cl->rx_wait, wait);
if (!list_empty(&cl->rd_completed))
mask |= POLLIN | POLLRDNORM;
else
mei_cl_read_start(cl, mei_cl_mtu(cl), file);
}
out:
mutex_unlock(&dev->device_lock);
return mask;
}
/**
* mei_poll - the poll function
*
* @file: pointer to file structure
* @wait: pointer to poll_table structure
*
* returns poll mask
*/
static unsigned int mei_poll(struct file *file, poll_table *wait)
{
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
if (WARN_ON(!cl || !cl->dev))
return POLLERR;
dev = cl->dev;
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
mask = POLLERR;
goto out;
}
mutex_unlock(&dev->device_lock);
if (cl == &dev->iamthif_cl)
return mei_amthif_poll(dev, file, wait);
poll_wait(file, &cl->tx_wait, wait);
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
mask = POLLERR;
goto out;
}
mask |= (POLLIN | POLLRDNORM);
out:
mutex_unlock(&dev->device_lock);
return mask;
}
