From ae3759c2573031f1306496c6f9f32f20e86f03aa Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Thu, 4 Apr 2013 22:41:01 +0200
Subject: [PATCH] USB: io_ti, stop dereferencing potential NULL

tty_port_tty_get might return a tty which is NULL. But it is
dereferenced unconditionally in edge_send. Stop dereferencing that by
sending usb_serial_port pointer around.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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