From 15e5bee33ffc11d0e5c6f819a65e7881c5c407be Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Tue, 22 Mar 2011 11:12:10 +0100
Subject: [PATCH] USB: cdc-acm: fix potential null-pointer dereference

Must check return value of tty_port_tty_get.

Cc: stable <stable@kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Reading git-format-patch failed