From: Ming Lei <ming.lei@redhat.com>
Date: Thu, 14 Oct 2021 16:17:05 +0800
Subject: nvme: add APIs for stopping/starting admin queue
Patch-mainline: v5.16-rc1
Git-commit: a277654bafb51fb8b4cf23550f15926bb02536f4
References: bsc#1201651

Add two APIs for stopping and starting admin queue.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211014081710.1871747-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/nvme/host/core.c |   12 ++++++++++++
 drivers/nvme/host/nvme.h |    2 ++
 2 files changed, 14 insertions(+)

--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4567,6 +4567,18 @@ void nvme_start_queues(struct nvme_ctrl
 }
 EXPORT_SYMBOL_GPL(nvme_start_queues);
 
+void nvme_stop_admin_queue(struct nvme_ctrl *ctrl)
+{
+	blk_mq_quiesce_queue(ctrl->admin_q);
+}
+EXPORT_SYMBOL_GPL(nvme_stop_admin_queue);
+
+void nvme_start_admin_queue(struct nvme_ctrl *ctrl)
+{
+	blk_mq_unquiesce_queue(ctrl->admin_q);
+}
+EXPORT_SYMBOL_GPL(nvme_start_admin_queue);
+
 void nvme_sync_io_queues(struct nvme_ctrl *ctrl)
 {
 	struct nvme_ns *ns;
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -670,6 +670,8 @@ void nvme_complete_async_event(struct nv
 
 void nvme_stop_queues(struct nvme_ctrl *ctrl);
 void nvme_start_queues(struct nvme_ctrl *ctrl);
+void nvme_stop_admin_queue(struct nvme_ctrl *ctrl);
+void nvme_start_admin_queue(struct nvme_ctrl *ctrl);
 void nvme_kill_queues(struct nvme_ctrl *ctrl);
 void nvme_sync_queues(struct nvme_ctrl *ctrl);
 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);