From: Keith Busch <kbusch@kernel.org>
Date: Thu, 5 Sep 2019 08:09:33 -0600
Subject: [PATCH] nvme: Restart request timers in resetting state
Patch-mainline: v5.4-rc4
Git-commit: 92b98e88d59ab17e65f261fbb5db272143ccf414
References: bsc#1181161

A controller in the resetting state has not yet completed its recovery
actions. The pci and fc transports were already handling this, so update
the remaining transports to not attempt additional recovery in this
state. Instead, just restart the request timer.

Tested-by: Edmund Nadolski <edmund.nadolski@intel.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
 drivers/nvme/host/rdma.c | 8 ++++++++
 drivers/nvme/host/tcp.c  | 8 ++++++++
 2 files changed, 16 insertions(+)

--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1678,6 +1678,14 @@ nvme_rdma_timeout(struct request *rq, bo
 	dev_warn(ctrl->ctrl.device, "I/O %d QID %d timeout\n",
 		 rq->tag, nvme_rdma_queue_idx(queue));
 
+	/*
+	 * Restart the timer if a controller reset is already scheduled. Any
+	 * timed out commands would be handled before entering the connecting
+	 * state.
+	 */
+	if (ctrl->ctrl.state == NVME_CTRL_RESETTING)
+		return BLK_EH_RESET_TIMER;
+
 	if (ctrl->ctrl.state != NVME_CTRL_LIVE) {
 		/*
 		 * Teardown immediately if controller times out while starting
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1980,6 +1980,14 @@ nvme_tcp_timeout(struct request *rq, boo
 	struct nvme_tcp_ctrl *ctrl = req->queue->ctrl;
 	struct nvme_tcp_cmd_pdu *pdu = req->pdu;
 
+	/*
+	 * Restart the timer if a controller reset is already scheduled. Any
+	 * timed out commands would be handled before entering the connecting
+	 * state.
+	 */
+	if (ctrl->ctrl.state == NVME_CTRL_RESETTING)
+		return BLK_EH_RESET_TIMER;
+
 	dev_warn(ctrl->ctrl.device,
 		"queue %d: timeout request %#x type %d\n",
 		nvme_tcp_queue_id(req->queue), rq->tag, pdu->hdr.type);