Davis (ankle) reverted to injured reserve Wednesday, per the NFL's official transaction log.
Davis (ankle) was waived with an injury designation Monday.
The Giants re-signed Davis on Monday, Matt Citak of the team's official site reports.
The Giants signed Davis to their practice squad last week, Aaron Wilson of ProFootballNetwork.com reports.
Davis is operating as the Vikings' starting left guard during offseason work, Will Ragatz of Sports Illustrated reports.
Davis (illness) is inactive Week 18 against Chicago.
Davis (ankle) is not listed on Wednesday's injury report, Craig Peters of the Vikings' official site reports.
Davis (ankle) is inactive for Sunday's game against the 49ers.
Davis (ankle) has been ruled out of Sunday's game against the Packers.