IB/srpt: Post receive work requests after qp transition to INIT state

IB and iWARP specs both spell out that posting a receive work request
to a queue pair in the RESET state is an invalid operation and required
to fail.  Postpone posting receive work requests until after the
transition to the INIT state.

Fixes: commit dea26209 ("IB/srpt: Change default behavior from using SRQ to using RC")
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
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

@@ -1687,10 +1687,6 @@ static int srpt_create_ch_ib(struct srpt_rdma_ch *ch)
 		goto err_destroy_cq;
 	}
 
-	if (!sdev->use_srq)
-		for (i = 0; i < ch->rq_size; i++)
-			srpt_post_recv(sdev, ch, ch->ioctx_recv_ring[i]);
-
 	atomic_set(&ch->sq_wr_avail, qp_init->cap.max_send_wr);
 
 	pr_debug("%s: max_cqe= %d max_sge= %d sq_size = %d cm_id= %p\n",
@@ -1701,6 +1697,10 @@ static int srpt_create_ch_ib(struct srpt_rdma_ch *ch)
 	if (ret)
 		goto err_destroy_qp;
 
+	if (!sdev->use_srq)
+		for (i = 0; i < ch->rq_size; i++)
+			srpt_post_recv(sdev, ch, ch->ioctx_recv_ring[i]);
+
 out:
 	kfree(qp_init);
 	return ret;