Merge "USB: android: Check ffs->state in ffs_ready_callback"

	struct android_dev *dev = ffs_function.android_dev;

	struct functionfs_config *config = ffs_function.config;

	if (dev)

		mutex_lock(&dev->mutex);

	if (!dev)

		return -ENODEV;

	mutex_lock(&dev->mutex);

	config->data = ffs;

	config->opened = true;

	if (config->enabled && dev)

		android_enable(dev);

	if (dev)

	mutex_unlock(&dev->mutex);

	return 0;

}