Porn Legend Asia Carrera ARRESTED ... For Drunk Driving With Daughter

Porn legend Asia Carrera was arrested Thursday in St. George, Utah for driving drunk with her daughter in the car ... and cops say her blood-alcohol level was MORE THAN DOUBLE the legal limit.

Cops reportedly received a call saying a woman was passed out on a couch in the Washington County School District building. Officers say they found Asia reeking of booze and she copped to driving beforehand with her daughter.

Asia -- real name Jessica Steinhauser -- took cops to her car, but reportedly attempted to leave during their talk ... so cops detained the former XXX actress for a field sobriety test.

Cops say the AVN Hall of Famer failed to pass -- and even fell during one walking attempt -- then blew a 0.254 and 0.202 BAC on two different machines ... well over the legal limit of .08.

Asia was booked for driving under the influence of alcohol with a minor and released the same day.