tree 8cc782bae4f0c08bd33d9a8642b2962bad5fb158
parent 1963c1451059c549f0b2568463c0cc59b5e30782
author Vincent Palatin <vpalatin@chromium.org> 1302570157 -0400
committer Vincent Palatin <vpalatin@chromium.org> 1302570157 -0400

USB: cdc-acm: fix deadlock in acm_tty_open

The mutex must be dropped before calling usb_autopm_interface_put,
else a concurrent call to acm_suspend will trigger a deadlock.

BUG=chrome-os-partner:3143
TEST=run power_Resume test in tight loops on Alex.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

Review URL: http://codereview.chromium.org/6824041

Change-Id: I35633cfd0aad8f9b3d72c83aefb25e2ed46e1a08