diff mbox series

[5.10,069/102] nvme-rdma: add clean action for failed reconnection

Message ID 20210305120906.674604443@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH March 5, 2021, 12:21 p.m. UTC 
From: Chao Leng <lengchao@huawei.com>

[ Upstream commit 958dc1d32c80566f58d18f05ef1f05bd32d172c1 ]

A crash happens when inject failed reconnection.
If reconnect failed after start io queues, the queues will be unquiesced
and new requests continue to be delivered. Reconnection error handling
process directly free queues without cancel suspend requests. The
suppend request will time out, and then crash due to use the queue
after free.

Add sync queues and cancel suppend requests for reconnection error
handling.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/nvme/host/rdma.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 4eb867804b6a..195703013272 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -919,12 +919,16 @@  static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
 
 	error = nvme_init_identify(&ctrl->ctrl);
 	if (error)
-		goto out_stop_queue;
+		goto out_quiesce_queue;
 
 	return 0;
 
+out_quiesce_queue:
+	blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
+	blk_sync_queue(ctrl->ctrl.admin_q);
 out_stop_queue:
 	nvme_rdma_stop_queue(&ctrl->queues[0]);
+	nvme_cancel_admin_tagset(&ctrl->ctrl);
 out_cleanup_queue:
 	if (new)
 		blk_cleanup_queue(ctrl->ctrl.admin_q);
@@ -1001,8 +1005,10 @@  static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 
 out_wait_freeze_timed_out:
 	nvme_stop_queues(&ctrl->ctrl);
+	nvme_sync_io_queues(&ctrl->ctrl);
 	nvme_rdma_stop_io_queues(ctrl);
 out_cleanup_connect_q:
+	nvme_cancel_tagset(&ctrl->ctrl);
 	if (new)
 		blk_cleanup_queue(ctrl->ctrl.connect_q);
 out_free_tag_set:
@@ -1144,10 +1150,18 @@  static int nvme_rdma_setup_ctrl(struct nvme_rdma_ctrl *ctrl, bool new)
 	return 0;
 
 destroy_io:
-	if (ctrl->ctrl.queue_count > 1)
+	if (ctrl->ctrl.queue_count > 1) {
+		nvme_stop_queues(&ctrl->ctrl);
+		nvme_sync_io_queues(&ctrl->ctrl);
+		nvme_rdma_stop_io_queues(ctrl);
+		nvme_cancel_tagset(&ctrl->ctrl);
 		nvme_rdma_destroy_io_queues(ctrl, new);
+	}
 destroy_admin:
+	blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
+	blk_sync_queue(ctrl->ctrl.admin_q);
 	nvme_rdma_stop_queue(&ctrl->queues[0]);
+	nvme_cancel_admin_tagset(&ctrl->ctrl);
 	nvme_rdma_destroy_admin_queue(ctrl, new);
 	return ret;
 }