nvme-rdma: start async event handler after reconnecting to a controller

When we reset or reconnect to a controller, we are cancelling the
async event handler so we can safely re-establish resources, but we
need to remember to start it again when we successfully reconnect.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index f4b83686..e82434a 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -745,6 +745,7 @@
 	if (ctrl->queue_count > 1) {
 		nvme_start_queues(&ctrl->ctrl);
 		nvme_queue_scan(&ctrl->ctrl);
+		nvme_queue_async_events(&ctrl->ctrl);
 	}
 
 	dev_info(ctrl->ctrl.device, "Successfully reconnected\n");
@@ -1747,6 +1748,7 @@
 	if (ctrl->queue_count > 1) {
 		nvme_start_queues(&ctrl->ctrl);
 		nvme_queue_scan(&ctrl->ctrl);
+		nvme_queue_async_events(&ctrl->ctrl);
 	}
 
 	return;