diff options
| -rw-r--r-- | drivers/block/nvme-core.c | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index ad9a9b61fc1d..ff4ff0999f02 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -432,8 +432,13 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx, if (unlikely(status)) { if (!(status & NVME_SC_DNR || blk_noretry_request(req)) && (jiffies - req->start_time) < req->timeout) { + unsigned long flags; + blk_mq_requeue_request(req); - blk_mq_kick_requeue_list(req->q); + spin_lock_irqsave(req->q->queue_lock, flags); + if (!blk_queue_stopped(req->q)) + blk_mq_kick_requeue_list(req->q); + spin_unlock_irqrestore(req->q->queue_lock, flags); return; } req->errors = nvme_error_status(status); @@ -2405,6 +2410,34 @@ static void nvme_dev_list_remove(struct nvme_dev *dev) kthread_stop(tmp); } +static void nvme_freeze_queues(struct nvme_dev *dev) +{ + struct nvme_ns *ns; + + list_for_each_entry(ns, &dev->namespaces, list) { + blk_mq_freeze_queue_start(ns->queue); + + spin_lock(ns->queue->queue_lock); + queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); + spin_unlock(ns->queue->queue_lock); + + blk_mq_cancel_requeue_work(ns->queue); + blk_mq_stop_hw_queues(ns->queue); + } +} + +static void nvme_unfreeze_queues(struct nvme_dev *dev) +{ + struct nvme_ns *ns; + + list_for_each_entry(ns, &dev->namespaces, list) { + queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); + blk_mq_unfreeze_queue(ns->queue); + blk_mq_start_stopped_hw_queues(ns->queue, true); + blk_mq_kick_requeue_list(ns->queue); + } +} + static void nvme_dev_shutdown(struct nvme_dev *dev) { int i; @@ -2413,8 +2446,10 @@ static void nvme_dev_shutdown(struct nvme_dev *dev) dev->initialized = 0; nvme_dev_list_remove(dev); - if (dev->bar) + if (dev->bar) { + nvme_freeze_queues(dev); csts = readl(&dev->bar->csts); + } if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { for (i = dev->queue_count - 1; i >= 0; i--) { struct nvme_queue *nvmeq = dev->queues[i]; @@ -2670,6 +2705,9 @@ static int nvme_dev_resume(struct nvme_dev *dev) dev->reset_workfn = nvme_remove_disks; queue_work(nvme_workq, &dev->reset_work); spin_unlock(&dev_list_lock); + } else { + nvme_unfreeze_queues(dev); + nvme_set_irq_hints(dev); } dev->initialized = 1; return 0; @@ -2807,8 +2845,8 @@ static void nvme_remove(struct pci_dev *pdev) pci_set_drvdata(pdev, NULL); flush_work(&dev->reset_work); misc_deregister(&dev->miscdev); - nvme_dev_remove(dev); nvme_dev_shutdown(dev); + nvme_dev_remove(dev); nvme_dev_remove_admin(dev); nvme_free_queues(dev, 0); nvme_release_prp_pools(dev); |