IB/srpt: Log all zero-length writes and completions

The new pr_debug() statements are useful when debugging the ib_srpt
driver.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/ulp/srpt/ib_srpt.c

@@ -840,6 +840,9 @@ static int srpt_zerolength_write(struct srpt_rdma_ch *ch)
 {
 	struct ib_send_wr wr, *bad_wr;
 
+	pr_debug("%s-%d: queued zerolength write\n", ch->sess_name,
+		 ch->qp->qp_num);
+
 	memset(&wr, 0, sizeof(wr));
 	wr.opcode = IB_WR_RDMA_WRITE;
 	wr.wr_cqe = &ch->zw_cqe;
@@ -851,6 +854,9 @@ static void srpt_zerolength_write_done(struct ib_cq *cq, struct ib_wc *wc)
 {
 	struct srpt_rdma_ch *ch = cq->cq_context;
 
+	pr_debug("%s-%d wc->status %d\n", ch->sess_name, ch->qp->qp_num,
+		 wc->status);
+
 	if (wc->status == IB_WC_SUCCESS) {
 		srpt_process_wait_list(ch);
 	} else {
@@ -1804,8 +1810,6 @@ static bool srpt_close_ch(struct srpt_rdma_ch *ch)
 		pr_err("%s-%d: changing queue pair into error state failed: %d\n",
 		       ch->sess_name, ch->qp->qp_num, ret);
 
-	pr_debug("%s-%d: queued zerolength write\n", ch->sess_name,
-		 ch->qp->qp_num);
 	ret = srpt_zerolength_write(ch);
 	if (ret < 0) {
 		pr_err("%s-%d: queuing zero-length write failed: %d\n",