Hi, What happens if the driver calls cdev_del() while one of the character device is being used (i.e. for. e.g. some process is in the middle of the ioctl call for that character device). Does the cdev_del() wait for that call to get completed? Is the driver guaranteed that once the cdev_del() returns, none of the driver character device operations are in use? Thanks, Rajat -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs