nvme: move nvme_stop_keep_alive() back to original position

Stopping keep-alive not only stops the keep-alive workqueue,
but also needs to be synchronized with I/O termination as we
must not send a keep-alive command after all I/O had been
terminated.
So to avoid any regressions move the call to stop_keep_alive()
back to its original position and ensure that keep-alive is
correctly stopped failing to setup the admin queue.

Fixes: 4733b65 ("nvme: start keep-alive after admin queue setup")
Suggested-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/host/core.c

@@ -482,7 +482,6 @@ EXPORT_SYMBOL_GPL(nvme_cancel_tagset);
 
 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl)
 {
-	nvme_stop_keep_alive(ctrl);
 	if (ctrl->admin_tagset) {
 		blk_mq_tagset_busy_iter(ctrl->admin_tagset,
 				nvme_cancel_request, ctrl);
@@ -4355,6 +4354,7 @@ void nvme_stop_ctrl(struct nvme_ctrl *ctrl)
 {
 	nvme_mpath_stop(ctrl);
 	nvme_auth_stop(ctrl);
+	nvme_stop_keep_alive(ctrl);
 	nvme_stop_failfast_work(ctrl);
 	flush_work(&ctrl->async_event_work);
 	cancel_work_sync(&ctrl->fw_act_work);

drivers/nvme/host/fc.c

@@ -2530,12 +2530,6 @@ __nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues)
 	 * clean up the admin queue. Same thing as above.
 	 */
 	nvme_quiesce_admin_queue(&ctrl->ctrl);
-
-	/*
-	 * Open-coding nvme_cancel_admin_tagset() as fc
-	 * is not using nvme_cancel_request().
-	 */
-	nvme_stop_keep_alive(&ctrl->ctrl);
 	blk_sync_queue(ctrl->ctrl.admin_q);
 	blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
 				nvme_fc_terminate_exchange, &ctrl->ctrl);
@@ -3138,27 +3132,28 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
 	nvme_unquiesce_admin_queue(&ctrl->ctrl);
 
 	ret = nvme_init_ctrl_finish(&ctrl->ctrl, false);
-	if (!ret && test_bit(ASSOC_FAILED, &ctrl->flags))
-		ret = -EIO;
 	if (ret)
 		goto out_disconnect_admin_queue;
-
+	if (test_bit(ASSOC_FAILED, &ctrl->flags)) {
+		ret = -EIO;
+		goto out_stop_keep_alive;
+	}
 	/* sanity checks */
 
 	/* FC-NVME does not have other data in the capsule */
 	if (ctrl->ctrl.icdoff) {
 		dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n",
 				ctrl->ctrl.icdoff);
 		ret = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		goto out_disconnect_admin_queue;
+		goto out_stop_keep_alive;
 	}
 
 	/* FC-NVME supports normal SGL Data Block Descriptors */
 	if (!nvme_ctrl_sgl_supported(&ctrl->ctrl)) {
 		dev_err(ctrl->ctrl.device,
 			"Mandatory sgls are not supported!\n");
 		ret = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		goto out_disconnect_admin_queue;
+		goto out_stop_keep_alive;
 	}
 
 	if (opts->queue_size > ctrl->ctrl.maxcmd) {
@@ -3205,6 +3200,8 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
 
 out_term_aen_ops:
 	nvme_fc_term_aen_ops(ctrl);
+out_stop_keep_alive:
+	nvme_stop_keep_alive(&ctrl->ctrl);
 out_disconnect_admin_queue:
 	dev_warn(ctrl->ctrl.device,
 		"NVME-FC{%d}: create_assoc failed, assoc_id %llx ret %d\n",

drivers/nvme/host/rdma.c

@@ -1080,6 +1080,7 @@ static int nvme_rdma_setup_ctrl(struct nvme_rdma_ctrl *ctrl, bool new)
 		nvme_rdma_free_io_queues(ctrl);
 	}
 destroy_admin:
+	nvme_stop_keep_alive(&ctrl->ctrl);
 	nvme_quiesce_admin_queue(&ctrl->ctrl);
 	blk_sync_queue(ctrl->ctrl.admin_q);
 	nvme_rdma_stop_queue(&ctrl->queues[0]);

drivers/nvme/host/tcp.c

@@ -2237,6 +2237,7 @@ static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new)
 		nvme_tcp_destroy_io_queues(ctrl, new);
 	}
 destroy_admin:
+	nvme_stop_keep_alive(ctrl);
 	nvme_tcp_teardown_admin_queue(ctrl, false);
 	return ret;
 }