lock updates to the buffer with the enclosure status in it so that one process cant read from it while another one is fetching it from the scsi device.
lock updates to the buffer with the enclosure status in it so that one
process cant read from it while another one is fetching it from the scsi
device.

looks ok krw@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars