static struct class *nvme_class;
-static void nvme_reset_failed_dev(struct work_struct *ws);
+static int __nvme_reset(struct nvme_dev *dev);
static int nvme_reset(struct nvme_dev *dev);
static int nvme_process_cq(struct nvme_queue *nvmeq);
+static void nvme_dead_ctrl(struct nvme_dev *dev);
struct async_cmd_info {
struct kthread_work work;
struct nvme_command cmd;
if (!nvmeq->qid || cmd_rq->aborted) {
- unsigned long flags;
-
- spin_lock_irqsave(&dev_list_lock, flags);
- if (work_busy(&dev->reset_work))
- goto out;
- list_del_init(&dev->node);
- dev_warn(dev->dev, "I/O %d QID %d timeout, reset controller\n",
- req->tag, nvmeq->qid);
- queue_work(nvme_workq, &dev->reset_work);
- out:
- spin_unlock_irqrestore(&dev_list_lock, flags);
+ spin_lock(&dev_list_lock);
+ if (!__nvme_reset(dev)) {
+ dev_warn(dev->dev,
+ "I/O %d QID %d timeout, reset controller\n",
+ req->tag, nvmeq->qid);
+ }
+ spin_unlock(&dev_list_lock);
return;
}
if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) ||
csts & NVME_CSTS_CFS) {
- if (work_busy(&dev->reset_work))
- continue;
- list_del_init(&dev->node);
- dev_warn(dev->dev,
- "Failed status: %x, reset controller\n",
- readl(&dev->bar->csts));
- queue_work(nvme_workq, &dev->reset_work);
+ if (!__nvme_reset(dev)) {
+ dev_warn(dev->dev,
+ "Failed status: %x, reset controller\n",
+ readl(&dev->bar->csts));
+ }
continue;
}
for (i = 0; i < dev->queue_count; i++) {
kfree(ns);
}
+/*
+ * Create I/O queues. Failing to create an I/O queue is not an issue,
+ * we can continue with less than the desired amount of queues, and
+ * even a controller without I/O queues an still be used to issue
+ * admin commands. This might be useful to upgrade a buggy firmware
+ * for example.
+ */
static void nvme_create_io_queues(struct nvme_dev *dev)
{
unsigned i;
break;
for (i = dev->online_queues; i <= dev->queue_count - 1; i++)
- if (nvme_create_queue(dev->queues[i], i))
+ if (nvme_create_queue(dev->queues[i], i)) {
+ nvme_free_queues(dev, i);
break;
+ }
}
static int set_queue_count(struct nvme_dev *dev, int count)
.compat_ioctl = nvme_dev_ioctl,
};
-static int nvme_dev_start(struct nvme_dev *dev)
+static void nvme_probe_work(struct work_struct *work)
{
- int result;
+ struct nvme_dev *dev = container_of(work, struct nvme_dev, probe_work);
bool start_thread = false;
+ int result;
result = nvme_dev_map(dev);
if (result)
- return result;
+ goto out;
result = nvme_configure_admin_queue(dev);
if (result)
goto free_tags;
dev->event_limit = 1;
- return result;
+
+ /*
+ * Keep the controller around but remove all namespaces if we don't have
+ * any working I/O queue.
+ */
+ if (dev->online_queues < 2) {
+ dev_warn(dev->dev, "IO queues not created\n");
+ nvme_dev_remove(dev);
+ } else {
+ nvme_unfreeze_queues(dev);
+ nvme_dev_add(dev);
+ }
+
+ return;
free_tags:
nvme_dev_remove_admin(dev);
nvme_dev_list_remove(dev);
unmap:
nvme_dev_unmap(dev);
- return result;
+ out:
+ if (!work_busy(&dev->reset_work))
+ nvme_dead_ctrl(dev);
}
static int nvme_remove_dead_ctrl(void *arg)
return 0;
}
-static int nvme_dev_resume(struct nvme_dev *dev)
-{
- int ret;
-
- ret = nvme_dev_start(dev);
- if (ret)
- return ret;
- if (dev->online_queues < 2) {
- dev_warn(dev->dev, "IO queues not created\n");
- nvme_free_queues(dev, 1);
- nvme_dev_remove(dev);
- } else {
- nvme_unfreeze_queues(dev);
- nvme_dev_add(dev);
- }
- return 0;
-}
-
static void nvme_dead_ctrl(struct nvme_dev *dev)
{
dev_warn(dev->dev, "Device failed to resume\n");
}
}
-static void nvme_dev_reset(struct nvme_dev *dev)
+static void nvme_reset_work(struct work_struct *ws)
{
+ struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work);
bool in_probe = work_busy(&dev->probe_work);
nvme_dev_shutdown(dev);
schedule_work(&dev->probe_work);
}
-static void nvme_reset_failed_dev(struct work_struct *ws)
+static int __nvme_reset(struct nvme_dev *dev)
{
- struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work);
- nvme_dev_reset(dev);
+ if (work_pending(&dev->reset_work))
+ return -EBUSY;
+ list_del_init(&dev->node);
+ queue_work(nvme_workq, &dev->reset_work);
+ return 0;
}
static int nvme_reset(struct nvme_dev *dev)
{
- int ret = -EBUSY;
+ int ret;
if (!dev->admin_q || blk_queue_dying(dev->admin_q))
return -ENODEV;
spin_lock(&dev_list_lock);
- if (!work_pending(&dev->reset_work)) {
- queue_work(nvme_workq, &dev->reset_work);
- ret = 0;
- }
+ ret = __nvme_reset(dev);
spin_unlock(&dev_list_lock);
if (!ret) {
}
static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset);
-static void nvme_async_probe(struct work_struct *work);
static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
int node, result = -ENOMEM;
goto free;
INIT_LIST_HEAD(&dev->namespaces);
- INIT_WORK(&dev->reset_work, nvme_reset_failed_dev);
+ INIT_WORK(&dev->reset_work, nvme_reset_work);
dev->dev = get_device(&pdev->dev);
pci_set_drvdata(pdev, dev);
result = nvme_set_instance(dev);
INIT_LIST_HEAD(&dev->node);
INIT_WORK(&dev->scan_work, nvme_dev_scan);
- INIT_WORK(&dev->probe_work, nvme_async_probe);
+ INIT_WORK(&dev->probe_work, nvme_probe_work);
schedule_work(&dev->probe_work);
return 0;
return result;
}
-static void nvme_async_probe(struct work_struct *work)
-{
- struct nvme_dev *dev = container_of(work, struct nvme_dev, probe_work);
-
- if (nvme_dev_resume(dev) && !work_busy(&dev->reset_work))
- nvme_dead_ctrl(dev);
-}
-
static void nvme_reset_notify(struct pci_dev *pdev, bool prepare)
{
struct nvme_dev *dev = pci_get_drvdata(pdev);
projects / linux-2.6-block.git / blobdiff