[RFC PATCH v1 5/7] nvme-tcp: Split nvme_tcp_teardown_io_queues() into two functions

[Mohamed Khalfella <mkhalfella@purestorage.com>]

Move code that quiesces IO queues out of nvme_tcp_teardown_io_queues() in
a new function nvme_tcp_suspend_io_queues(). In a later change this
allows us to disable nvme controller without needing to tear down IO
queues and canceling inflight requests.

Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
---
 drivers/nvme/host/tcp.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 99533ff1ea20..327e37a25281 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2266,12 +2266,18 @@ static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl)
 	}
 }
 
-static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl)
+static void nvme_tcp_suspend_io_queues(struct nvme_ctrl *ctrl)
 {
 	if (ctrl->queue_count <= 1)
 		return;
 	nvme_quiesce_io_queues(ctrl);
 	nvme_sync_io_queues(ctrl);
+}
+
+static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl)
+{
+	if (ctrl->queue_count <= 1)
+		return;
 	nvme_tcp_stop_io_queues(ctrl);
 	nvme_cancel_tagset(ctrl);
 	nvme_tcp_free_io_queues(ctrl);
@@ -2411,6 +2417,7 @@ static void nvme_tcp_error_recovery_work(struct work_struct *work)
 
 	nvme_stop_keep_alive(ctrl);
 	flush_work(&ctrl->async_event_work);
+	nvme_tcp_suspend_io_queues(ctrl);
 	nvme_tcp_teardown_io_queues(ctrl);
 	/* unquiesce to fail fast pending requests */
 	nvme_unquiesce_io_queues(ctrl);
@@ -2432,6 +2439,7 @@ static void nvme_tcp_error_recovery_work(struct work_struct *work)
 
 static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown)
 {
+	nvme_tcp_suspend_io_queues(ctrl);
 	nvme_tcp_teardown_io_queues(ctrl);
 	nvme_quiesce_admin_queue(ctrl);
 	nvme_disable_ctrl(ctrl, shutdown);
-- 
2.48.1