From 9e6a6b1212100148c109675e003369e3e219dbd9 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Thu, 14 Oct 2021 16:17:08 +0800 Subject: nvme: paring quiesce/unquiesce The current blk_mq_quiesce_queue() and blk_mq_unquiesce_queue() always stops and starts the queue unconditionally. And there can be concurrent quiesce/unquiesce coming from different unrelated code paths, so unquiesce may come unexpectedly and start queue too early. Prepare for supporting concurrent quiesce/unquiesce from multiple contexts, so that we can address the above issue. NVMe has very complicated quiesce/unquiesce use pattern, add one atomic bit for makeiing sure that blk-mq quiece/unquiesce is always called in pair. Signed-off-by: Ming Lei Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211014081710.1871747-5-ming.lei@redhat.com Signed-off-by: Jens Axboe --- drivers/nvme/host/nvme.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/nvme/host/nvme.h') diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index e7af00860452..3652439a7458 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -342,6 +342,7 @@ struct nvme_ctrl { int nr_reconnects; unsigned long flags; #define NVME_CTRL_FAILFAST_EXPIRED 0 +#define NVME_CTRL_ADMIN_Q_STOPPED 1 struct nvmf_ctrl_options *opts; struct page *discard_page; @@ -463,6 +464,7 @@ struct nvme_ns { #define NVME_NS_ANA_PENDING 2 #define NVME_NS_FORCE_RO 3 #define NVME_NS_READY 4 +#define NVME_NS_STOPPED 5 struct cdev cdev; struct device cdev_device; -- cgit v1.2.3