RDMA/amso1100: Initialize the wait_queue_head_t in the c2_qp structure

Fix a crash if the driver has to wait for a QP reference to be dropped
when destroying the QP.
Signed-off-by: Ethan Burns <eaburns@iol.unh.edu>
Acked-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/amso1100/c2_qp.c

@@ -506,6 +506,7 @@ int c2_alloc_qp(struct c2_dev *c2dev,
 	qp->send_sgl_depth = qp_attrs->cap.max_send_sge;
 	qp->rdma_write_sgl_depth = qp_attrs->cap.max_send_sge;
 	qp->recv_sgl_depth = qp_attrs->cap.max_recv_sge;
+	init_waitqueue_head(&qp->wait);
 
 	/* Initialize the SQ MQ */
 	q_size = be32_to_cpu(reply->sq_depth);