tree 234e8b760c190f6a93a8f8de0776aaf2e93f5cd0
parent f9076e28013e448ba2a905ae905ac9b53f8a2e16
author Alexey Khoroshilov <khoroshilov@ispras.ru> 1397254245 +0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1397681768 -0700

USB: cdc-acm: fix double usb_autopm_put_interface() in acm_port_activate()

If acm_submit_read_urbs() fails in acm_port_activate(), error handling
code calls usb_autopm_put_interface() while it is already called
before acm_submit_read_urbs(). The patch reorganizes error handling code
to avoid double decrement of USB interface's PM-usage counter.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>