From 7702b331861bb031ba903cbf11325d2809baa0ed Mon Sep 17 00:00:00 2001 From: Chao Leng Date: Thu, 21 Jan 2021 11:32:38 +0800 Subject: [PATCH] nvme-tcp: add clean action for failed reconnection [ Upstream commit 70a99574a79f1cd4dc7ad56ea37be40844bfb97b ] 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 Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/host/tcp.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index a554021e1ab92..77a3c488ec120 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1710,8 +1710,10 @@ static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) out_wait_freeze_timed_out: nvme_stop_queues(ctrl); + nvme_sync_io_queues(ctrl); nvme_tcp_stop_io_queues(ctrl); out_cleanup_connect_q: + nvme_cancel_tagset(ctrl); if (new) blk_cleanup_queue(ctrl->connect_q); out_free_tag_set: @@ -1773,12 +1775,16 @@ static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) error = nvme_init_identify(ctrl); if (error) - goto out_stop_queue; + goto out_quiesce_queue; return 0; +out_quiesce_queue: + blk_mq_quiesce_queue(ctrl->admin_q); + blk_sync_queue(ctrl->admin_q); out_stop_queue: nvme_tcp_stop_queue(ctrl, 0); + nvme_cancel_admin_tagset(ctrl); out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->admin_q); @@ -1892,10 +1898,18 @@ static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new) return 0; destroy_io: - if (ctrl->queue_count > 1) + if (ctrl->queue_count > 1) { + nvme_stop_queues(ctrl); + nvme_sync_io_queues(ctrl); + nvme_tcp_stop_io_queues(ctrl); + nvme_cancel_tagset(ctrl); nvme_tcp_destroy_io_queues(ctrl, new); + } destroy_admin: + blk_mq_quiesce_queue(ctrl->admin_q); + blk_sync_queue(ctrl->admin_q); nvme_tcp_stop_queue(ctrl, 0); + nvme_cancel_admin_tagset(ctrl); nvme_tcp_destroy_admin_queue(ctrl, new); return ret; }