tty/serial: atmel: reschedule TX after RX was started

commit d2ace81bf902a9f11d52e59e5d232d2255a0e353 upstream.

When half-duplex RS485 communication is used, after RX is started, TX
tasklet still needs to be  scheduled tasklet. This avoids console freezing
when more data is to be transmitted, if the serial communication is not
closed.

Fixes: 69646d7a3689 ("tty/serial: atmel: RS485 HD w/DMA: enable RX after TX is stopped")
Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20190813074025.16218-1-razvan.stefanescu@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index f747f1a1780c35d798474c36cde2f48d62ab8192..9ee41ba0e55b577fa9585871a0ecdfcc76bfa7a2 100644 (file)
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1276,7 +1276,6 @@ atmel_handle_transmit(struct uart_port *port, unsigned int pending)
 
                        atmel_port->hd_start_rx = false;
                        atmel_start_rx(port);
-                       return;
                }
 
                atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx);