tree 3e34252eeb70e4480953a3282ae3e137efc42418
parent 15e5bee33ffc11d0e5c6f819a65e7881c5c407be
author Johan Hovold <jhovold@gmail.com> 1300788731 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1300911722 -0700

USB: cdc-acm: fix potential null-pointer dereference on disconnect

Fix potential null-pointer exception on disconnect introduced by commit
11ea859d64b69a747d6b060b9ed1520eab1161fe (USB: additional power savings
for cdc-acm devices that support remote wakeup).

Only access acm->dev after making sure it is non-null in control urb
completion handler.

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