1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 09d82062b973..60543d79ef56 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -709,12 +709,13 @@ static void mos7840_bulk_in_callback(struct urb *urb)
         dbg("%s", "Entering ........... \n");
 
         if (urb->actual_length) {
-                tty = mos7840_port->port->port.tty;
+                tty = tty_port_tty_get(&mos7840_port->port->port);
                 if (tty) {
                         tty_buffer_request_room(tty, urb->actual_length);
                         tty_insert_flip_string(tty, data, urb->actual_length);
                         dbg(" %s \n", data);
                         tty_flip_buffer_push(tty);
+                        tty_kref_put(tty);
                 }
                 mos7840_port->icount.rx += urb->actual_length;
                 smp_wmb();
@@ -773,10 +774,10 @@ static void mos7840_bulk_out_data_callback(struct urb *urb)
 
         dbg("%s \n", "Entering .........");
 
-        tty = mos7840_port->port->port.tty;
-
+        tty = tty_port_tty_get(&mos7840_port->port->port);
         if (tty && mos7840_port->open)
                 tty_wakeup(tty);
+        tty_kref_put(tty);
 
 }