Thread (1 message) 1 message, 1 author, 2021-09-06

[PATCH AUTOSEL 5.13 21/46] nvme-rdma: don't update queue count when failing to set io queues

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DORMANTno replies REVIEWED: 4 (4M)

From: Sasha Levin <sashal@kernel.org>
Date: 2021-09-06 01:23:59
Also in: lkml, stable
Subsystem: nvm express driver, the rest · Maintainers: Keith Busch, Jens Axboe, Christoph Hellwig, Sagi Grimberg, Linus Torvalds

1 review trailer (1 from subsystem maintainers).

From: Ruozhu Li <redacted>

[ Upstream commit 85032874f80ba17bf187de1d14d9603bf3f582b8 ]

We update ctrl->queue_count and schedule another reconnect when io queue
count is zero.But we will never try to create any io queue in next reco-
nnection, because ctrl->queue_count already set to zero.We will end up
having an admin-only session in Live state, which is exactly what we try
to avoid in the original patch.
Update ctrl->queue_count after queue_count zero checking to fix it.

Signed-off-by: Ruozhu Li <redacted>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/nvme/host/rdma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 4697a94c0945..f80682f7df54 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -736,13 +736,13 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
 	if (ret)
 		return ret;
 
-	ctrl->ctrl.queue_count = nr_io_queues + 1;
-	if (ctrl->ctrl.queue_count < 2) {
+	if (nr_io_queues == 0) {
 		dev_err(ctrl->ctrl.device,
 			"unable to set any I/O queues\n");
 		return -ENOMEM;
 	}
 
+	ctrl->ctrl.queue_count = nr_io_queues + 1;
 	dev_info(ctrl->ctrl.device,
 		"creating %d I/O queues.\n", nr_io_queues);
 
-- 
2.30.2


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