Avoid that nvme_queue_rq() is still running when nvme_stop_queues()
returns.
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
---
drivers/nvme/host/core.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 18a265d..96f00c7 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -201,13 +201,7 @@ static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk)
void nvme_requeue_req(struct request *req)
{
- unsigned long flags;
-
- blk_mq_requeue_request(req, false);
- spin_lock_irqsave(req->q->queue_lock, flags);
- if (!blk_mq_queue_stopped(req->q))
- blk_mq_kick_requeue_list(req->q);
- spin_unlock_irqrestore(req->q->queue_lock, flags);
+ blk_mq_requeue_request(req, true);
}
EXPORT_SYMBOL_GPL(nvme_requeue_req);
@@ -2074,11 +2068,14 @@ EXPORT_SYMBOL_GPL(nvme_kill_queues);
void nvme_stop_queues(struct nvme_ctrl *ctrl)
{
struct nvme_ns *ns;
+ struct request_queue *q;
mutex_lock(&ctrl->namespaces_mutex);
list_for_each_entry(ns, &ctrl->namespaces, list) {
- blk_mq_cancel_requeue_work(ns->queue);
- blk_mq_stop_hw_queues(ns->queue);
+ q = ns->queue;
+ blk_mq_cancel_requeue_work(q);
+ blk_mq_stop_hw_queues(q);
+ blk_mq_quiesce_queue(q);
}
mutex_unlock(&ctrl->namespaces_mutex);
}
--
2.10.1
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