/* Returns zero if unsuccessful or an error if not.  */
int scsi_device_quiesce(struct scsi_device *sdev)
/* Returns zero if unsuccessful or an error if not.  */
int scsi_device_quiesce(struct scsi_device *sdev)
{
	int err = scsi_device_set_state(sdev, SDEV_QUIESCE);
	if (err)
		return err;
	scsi_run_queue(sdev->request_queue);
	while (sdev->device_busy) {
		msleep_interruptible(200);
		scsi_run_queue(sdev->request_queue);
	}
	return 0;
}