serial: doc: Document .unthrottle()
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/serial/driver b/Documentation/serial/driver
index 50f3d94..3b2a97d 100644
--- a/Documentation/serial/driver
+++ b/Documentation/serial/driver
@@ -133,6 +133,13 @@
Locking: none.
+ unthrottle(port)
+ Notify the serial driver that characters can now be sent to the serial
+ port without fear of overrunning the input buffers of the line
+ disciplines.
+
+ Locking: none.
+
send_xchar(port,ch)
Transmit a high priority character, even if the port is stopped.
This is used to implement XON/XOFF flow control and tcflow(). If