Add enable_ms to jsm driver

This fixes a crash observed when non-existant enable_ms function is
called for jsm driver.

Signed-off-by: Scott Kilau <Scott.Kilau@digi.com>
Signed-off-by: Paul Larson <pl@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
index 3547558d2caf..324c74d2f666 100644
--- a/drivers/serial/jsm/jsm_tty.c
+++ b/drivers/serial/jsm/jsm_tty.c
@@ -161,6 +161,11 @@ static void jsm_tty_stop_rx(struct uart_port *port)
         channel->ch_bd->bd_ops->disable_receiver(channel);
 }
 
+static void jsm_tty_enable_ms(struct uart_port *port)
+{
+        /* Nothing needed */
+}
+
 static void jsm_tty_break(struct uart_port *port, int break_state)
 {
         unsigned long lock_flags;
@@ -345,6 +350,7 @@ static struct uart_ops jsm_ops = {
         .start_tx       = jsm_tty_start_tx,
         .send_xchar     = jsm_tty_send_xchar,
         .stop_rx        = jsm_tty_stop_rx,
+        .enable_ms      = jsm_tty_enable_ms,
         .break_ctl      = jsm_tty_break,
         .startup        = jsm_tty_open,
         .shutdown       = jsm_tty_close,