diff --git a/[refs] b/[refs]
index 398cdeab776e..39090d4963da 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c19ecd654209725444d1f47a4422e6f48846b53c
+refs/heads/master: ad18027f4909c8fc107056460c97dbedb6635128
diff --git a/trunk/drivers/usb/serial/mos7840.c b/trunk/drivers/usb/serial/mos7840.c
index 021be39fe16e..5b71962d0351 100644
--- a/trunk/drivers/usb/serial/mos7840.c
+++ b/trunk/drivers/usb/serial/mos7840.c
@@ -2413,11 +2413,12 @@ static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
 	}
 
 	mos7840_port = mos7840_get_port_private(port);
-	tty = mos7840_port->port->tty;
 
 	if (mos7840_port == NULL)
 		return -1;
 
+	tty = mos7840_port->port->tty;
+
 	dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
 
 	switch (cmd) {