linux-kernel - [PATCH v4 8/8] nvme-rdma: Unfreeze queues on reconnect

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Message-Id: <20210802112658.75875-9-dwagner@suse.de>
Date:   Mon,  2 Aug 2021 13:26:58 +0200
From:   Daniel Wagner <dwagner@...e.de>
To:     linux-nvme@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        James Smart <james.smart@...adcom.com>,
        Keith Busch <kbusch@...nel.org>,
        Ming Lei <ming.lei@...hat.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Hannes Reinecke <hare@...e.de>,
        Wen Xiong <wenxiong@...ibm.com>,
        Daniel Wagner <dwagner@...e.de>
Subject: [PATCH v4 8/8] nvme-rdma: Unfreeze queues on reconnect

During the queue teardown in nvme_rdma_teardown_io_queues() freeze is
called unconditionally. When we reconnect we need to pair the freeze
with an unfreeze to avoid hanging I/Os. For newly created connection
this is not needed.

Fixes: 9f98772ba307 ("nvme-rdma: fix controller reset hang during traffic")
Signed-off-by: Daniel Wagner <dwagner@...e.de>
---
 drivers/nvme/host/rdma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index de2a8950d282..21a8a5353af0 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -901,6 +901,8 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
 			error = PTR_ERR(ctrl->ctrl.admin_q);
 			goto out_cleanup_fabrics_q;
 		}
+	} else {
+		nvme_unfreeze(&ctrl->ctrl);
 	}
 
 	error = nvme_rdma_start_queue(ctrl, 0);
-- 
2.29.2