diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c
index a372afbbfbef2bb206a21c591e15c1f812761249..2ce0928dddd644e7b8a720ddd8d582e2f28c6d44 100644
--- a/drivers/infiniband/sw/rdmavt/qp.c
+++ b/drivers/infiniband/sw/rdmavt/qp.c
@@ -645,7 +645,7 @@ static void rvt_free_qpn(struct rvt_qpn_table *qpt, u32 qpn)
 {
 	struct rvt_qpn_map *map;
 
-	map = qpt->map + qpn / RVT_BITS_PER_PAGE;
+	map = qpt->map + (qpn & RVT_QPN_MASK) / RVT_BITS_PER_PAGE;
 	if (map->page)
 		clear_bit(qpn & RVT_BITS_PER_PAGE_MASK, map->page);
 }