diff options
| author | Keith Busch <keith.busch@intel.com> | 2013-12-10 13:10:37 -0700 |
|---|---|---|
| committer | Matthew Wilcox <matthew.r.wilcox@intel.com> | 2014-01-27 19:20:02 -0500 |
| commit | d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380 (patch) | |
| tree | 356576d531535d11ebcf321f92131e0e4513ee32 | |
| parent | 9a6b94584de1a0467d85b435df9c744c5c45a270 (diff) | |
NVMe: Schedule reset for failed controllers
Schedules a controller reset when it indicates it has a failed status. If
the device does not become ready after a reset, the pci device will be
scheduled for removal.
Signed-off-by: Keith Busch <keith.busch@intel.com>
[fixed checkpatch issue]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
| -rw-r--r-- | drivers/block/nvme-core.c | 21 | ||||
| -rw-r--r-- | include/linux/nvme.h | 1 |
2 files changed, 20 insertions, 2 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index 000bca43c23b..2f5b9f5f5a21 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -60,6 +60,8 @@ static LIST_HEAD(dev_list); static struct task_struct *nvme_thread; static struct workqueue_struct *nvme_workq; +static void nvme_reset_failed_dev(struct work_struct *ws); + /* * An NVM Express queue. Each device has at least two (one for admin * commands and one for I/O commands). @@ -1612,13 +1614,25 @@ static void nvme_resubmit_bios(struct nvme_queue *nvmeq) static int nvme_kthread(void *data) { - struct nvme_dev *dev; + struct nvme_dev *dev, *next; while (!kthread_should_stop()) { set_current_state(TASK_INTERRUPTIBLE); spin_lock(&dev_list_lock); - list_for_each_entry(dev, &dev_list, node) { + list_for_each_entry_safe(dev, next, &dev_list, node) { int i; + if (readl(&dev->bar->csts) & NVME_CSTS_CFS && + dev->initialized) { + if (work_busy(&dev->reset_work)) + continue; + list_del_init(&dev->node); + dev_warn(&dev->pci_dev->dev, + "Failed status, reset controller\n"); + INIT_WORK(&dev->reset_work, + nvme_reset_failed_dev); + queue_work(nvme_workq, &dev->reset_work); + continue; + } for (i = 0; i < dev->queue_count; i++) { struct nvme_queue *nvmeq = dev->queues[i]; if (!nvmeq) @@ -2006,6 +2020,7 @@ static void nvme_dev_shutdown(struct nvme_dev *dev) { int i; + dev->initialized = 0; for (i = dev->queue_count - 1; i >= 0; i--) nvme_disable_queue(dev, i); @@ -2196,6 +2211,7 @@ static int nvme_dev_resume(struct nvme_dev *dev) queue_work(nvme_workq, &dev->reset_work); spin_unlock(&dev_list_lock); } + dev->initialized = 1; return 0; } @@ -2269,6 +2285,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (result) goto remove; + dev->initialized = 1; kref_init(&dev->kref); return 0; diff --git a/include/linux/nvme.h b/include/linux/nvme.h index eed81cc56d7e..117d877e8be5 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -95,6 +95,7 @@ struct nvme_dev { u32 max_hw_sectors; u32 stripe_size; u16 oncs; + u8 initialized; }; /* |