[PATCH] InfiniBand: remove unbalance refcnt decrement

Fix unbalanced QP reference count decrement (introduced with QP lock
optimization patch)
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/infiniband/hw/mthca/mthca_cq.c

@@ -422,8 +422,6 @@ static inline int mthca_poll_one(struct mthca_dev *dev,
 				*freed = 0;
 			}
 			spin_unlock(&(*cur_qp)->lock);
-			if (atomic_dec_and_test(&(*cur_qp)->refcount))
-				wake_up(&(*cur_qp)->wait);
 		}
 
 		spin_lock(&dev->qp_table.lock);