Greg:

This patch fixes a bug in disconnect handling for the dummy_hcd driver.
After a disconnect the driver would still accept URBs for endpoint 0,
leading to an oops.  It also improves the ad-hoc technique used by the
driver to track its gadget's struct usb_device and fixes the way
port-power changes are handled.  Please apply.

Alan Stern
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>