/**
* struct serdev_device_ops - Callback operations for a serdev device
- * @receive_buf: Function called with data received from device.
- * @write_wakeup: Function called when ready to transmit more data.
+ * @receive_buf: Function called with data received from device;
+ * returns number of bytes accepted; may sleep.
+ * @write_wakeup: Function called when ready to transmit more data; must
+ * not sleep.
*/
struct serdev_device_ops {
int (*receive_buf)(struct serdev_device *, const unsigned char *, size_t);