Steve Clarke is hoping to keep Glenn Murray at Reading after his loan deal expired following the 2-1 win over Norwich.
QPR boss Harry Redknapp admitted he needs to strengthen his squad after his side's 0-0 draw with Crystal Palace.
Cardiff have completed the signing of Fraizer Campbell from Sunderland.
The striker, who was capped by England only 11 months ago, joins the Championship leaders on a three-and-a-half-year deal for an undisclosed fee.
Campbell has been restricted to just one Premier League start this season following Steven Fletcher's arrival and would have been out of contract in the summer.
The 25-year-old, who came through the Manchester United youth system, was previously linked with Hull, where he spent a season on loan in 2008/9.