usb: gadget: f_mass_storage: remove unused operations

	 * set).

	 */

	int (*thread_exits)(struct fsg_common *common);

	/*

	 * Called prior to ejection.  Negative return means error,

	 * zero means to continue with ejection, positive means not to

	 * eject.

	 */

	int (*pre_eject)(struct fsg_common *common,

			 struct fsg_lun *lun, int num);

	/*

	 * Called after ejection.  Negative return means error, zero

	 * or positive is just a success.

	 */

	int (*post_eject)(struct fsg_common *common,

			  struct fsg_lun *lun, int num);

};

/* Data shared by all the FSG instances. */

	if (!loej)

		return 0;

	/* Simulate an unload/eject */

	if (common->ops && common->ops->pre_eject) {

		int r = common->ops->pre_eject(common, curlun,

					       curlun - common->luns);

		if (unlikely(r < 0))

			return r;

		else if (r)

			return 0;

	}

	up_read(&common->filesem);

	down_write(&common->filesem);

	fsg_lun_close(curlun);

	up_write(&common->filesem);

	down_read(&common->filesem);

	return common->ops && common->ops->post_eject

		? min(0, common->ops->post_eject(common, curlun,

						 curlun - common->luns))

		: 0;

	return 0;

}

static int do_prevent_allow(struct fsg_common *common)