After Sagi's commit (nvme-rdma: fix concurrent reset and reconnect), both nvme-fc/rdma have following pattern: RESETTING - quiesce blk-mq queues, teardown and delete queues/ connections, clear out outstanding IO requests... RECONNECTING - establish new queues/connections and some other initializing things. Introduce RECONNECTING to nvme-pci transport to do the same mark. Then we get a coherent state definition among nvme pci/rdma/fc transports.
Suggested-by: James Smart <james.sm...@broadcom.com> Signed-off-by: Jianchao Wang <jianchao.w.w...@oracle.com> --- drivers/nvme/host/core.c | 2 +- drivers/nvme/host/pci.c | 19 +++++++++++++++++-- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 230cc09..23b3e53 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -242,7 +242,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, switch (new_state) { case NVME_CTRL_ADMIN_ONLY: switch (old_state) { - case NVME_CTRL_RESETTING: + case NVME_CTRL_RECONNECTING: changed = true; /* FALLTHRU */ default: diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 45f843d..05344be 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1138,9 +1138,14 @@ static bool nvme_should_reset(struct nvme_dev *dev, u32 csts) */ bool nssro = dev->subsystem && (csts & NVME_CSTS_NSSRO); - /* If there is a reset ongoing, we shouldn't reset again. */ - if (dev->ctrl.state == NVME_CTRL_RESETTING) + /* If there is a reset/reinit ongoing, we shouldn't reset again. */ + switch (dev->ctrl.state) { + case NVME_CTRL_RESETTING: + case NVME_CTRL_RECONNECTING: return false; + default: + break; + } /* We shouldn't reset unless the controller is on fatal error state * _or_ if we lost the communication with it. @@ -2304,6 +2309,16 @@ static void nvme_reset_work(struct work_struct *work) if (dev->ctrl.ctrl_config & NVME_CC_ENABLE) nvme_dev_disable(dev, false); + /* + * Introduce RECONNECTING state from nvme-fc/rdma transports to mark the + * initializing procedure here. + */ + if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RECONNECTING)) { + dev_warn(dev->ctrl.device, + "failed to mark controller RECONNECTING\n"); + goto out; + } + result = nvme_pci_enable(dev); if (result) goto out; -- 2.7.4