Donnelly seals Coventry loan
Meanwhile, Daniel Alfei has extended his loan spell with League Two outfit Portsmouth until the end of the season.
Wales Under-21 international Alfei originally joined Pompey earlier this month, but the right-back will now remain at Fratton Park for the remainder of the campaign.
Alfei, 21, has already played four games for Portsmouth, who are 18th in League Two and six points off the relegation zone.