tree 480a2224d7950ed6eb7366422ade0ff13b45d88e
parent 19cada644d55214b6d08e4a8b2345eac1c479167
author Benoit Goby <benoit@android.com> 1332208612 -0700
committer Benoit Goby <benoit@android.com> 1332372269 -0700

usb: gadget: adb: Only enable the gadget when adbd is ready

When adb is enabled, only connect the gadget when adbd is ready. If adbd
dies or is restarted (e.g. "adb root"), the gadget is disconnected when
the adb device is close, and it is re-connected once adb re-open the
device.

- Add callbacks to adb, similar to FunctionFs callbacks, to notify the
  gadget when the daemon is ready or closed.
- Refcount calls to android_enable/android_disable to enable the gadget
  only once all the function daemons are ready.
- Add enable/disble to android_usb_function to notify the function when
  it is added/removed from the list of enabled functions.

Change-Id: Id54ff85aec9cf8715c94b4f9bd6137a79ad58bfc
Signed-off-by: Benoit Goby <benoit@android.com>