TTY: serial, stop accessing potential NULLs

[cascardo/linux.git] / drivers / tty / serial / sunzilog.c

diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index 27669ff..813ef8e 100644 (file)
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -388,7 +388,7 @@ sunzilog_receive_chars(struct uart_sunzilog_port *up,
                        else if (r1 & CRC_ERR)
                                flag = TTY_FRAME;
                }
-               if (uart_handle_sysrq_char(&up->port, ch))
+               if (uart_handle_sysrq_char(&up->port, ch) || !port)
                        continue;
 
                if (up->port.ignore_status_mask == 0xff ||