HelenOS sources

DEVICE_NOT_PRESENT  460 uspace/srv/devman/driver.c 		if (dev->state == DEVICE_NOT_PRESENT) {
DEVICE_NOT_PRESENT  611 uspace/srv/devman/driver.c 		if (dev->state == DEVICE_NOT_PRESENT)
DEVICE_NOT_PRESENT  672 uspace/srv/devman/driver.c 		dev->state = DEVICE_NOT_PRESENT;
HelenOS homepage, sources at GitHub