static int vhci_fasync(int fd, struct file *file, int on)
{
struct vhci_data *data = file->private_data;
static int vhci_fasync(int fd, struct file *file, int on)
{
struct vhci_data *data = file->private_data;
err = fasync_helper(fd, file, on, &data->fasync);
if (err < 0)
err = fasync_helper(fd, file, on, &data->fasync);
if (err < 0)