Merge branch 'for-linus' of git://www.jni.nu/cris

[pandora-kernel.git] / Documentation / serial / driver

diff --git a/Documentation/serial/driver b/Documentation/serial/driver
index 88ad615..77ba0af 100644 (file)
--- a/Documentation/serial/driver
+++ b/Documentation/serial/driver
@@ -186,6 +186,17 @@ hardware.
        Locking: port_sem taken.
        Interrupts: caller dependent.
 
+  flush_buffer(port)
+       Flush any write buffers, reset any DMA state and stop any
+       ongoing DMA transfers.
+
+       This will be called whenever the port->info->xmit circular
+       buffer is cleared.
+
+       Locking: port->lock taken.
+       Interrupts: locally disabled.
+       This call must not sleep
+
   set_termios(port,termios,oldtermios)
        Change the port parameters, including word length, parity, stop
        bits.  Update read_status_mask and ignore_status_mask to indicate