dont let the antisemaphore clear the WAITING flag so NO_CCB doesnt cause us to loop forever.
dont let the antisemaphore clear the WAITING flag so NO_CCB doesnt cause
us to loop forever.

follow sdstart through to to an adapters scsi_cmd handler and assume that
handler returns NO_CCB to enjoy the bug in full.

ok kettenis@ krw@ beck@

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