[PATCH] Serial: Adjust serial locking
This patch changes the way serial ports are locked when getting modem
status. This change is necessary because we will need to atomically
read the modem status and take action depending on the CTS status.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/Documentation/serial/driver b/Documentation/serial/driver
index e9c0178..ac7eabb 100644
--- a/Documentation/serial/driver
+++ b/Documentation/serial/driver
@@ -107,8 +107,8 @@
indicate that the signal is permanently active. If RI is
not available, the signal should not be indicated as active.
- Locking: none.
- Interrupts: caller dependent.
+ Locking: port->lock taken.
+ Interrupts: locally disabled.
This call must not sleep
stop_tx(port,tty_stop)