diff options
Diffstat (limited to 'drivers/nvme/host/core.c')
| -rw-r--r-- | drivers/nvme/host/core.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 20559ad98be1..bd8f598d0c37 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -58,6 +58,55 @@ static DEFINE_SPINLOCK(dev_list_lock); static struct class *nvme_class; +bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, + enum nvme_ctrl_state new_state) +{ + enum nvme_ctrl_state old_state = ctrl->state; + bool changed = false; + + spin_lock_irq(&ctrl->lock); + switch (new_state) { + case NVME_CTRL_LIVE: + switch (old_state) { + case NVME_CTRL_RESETTING: + changed = true; + /* FALLTHRU */ + default: + break; + } + break; + case NVME_CTRL_RESETTING: + switch (old_state) { + case NVME_CTRL_NEW: + case NVME_CTRL_LIVE: + changed = true; + /* FALLTHRU */ + default: + break; + } + break; + case NVME_CTRL_DELETING: + switch (old_state) { + case NVME_CTRL_LIVE: + case NVME_CTRL_RESETTING: + changed = true; + /* FALLTHRU */ + default: + break; + } + break; + default: + break; + } + spin_unlock_irq(&ctrl->lock); + + if (changed) + ctrl->state = new_state; + + return changed; +} +EXPORT_SYMBOL_GPL(nvme_change_ctrl_state); + static void nvme_free_ns(struct kref *kref) { struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); @@ -1583,6 +1632,8 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, { int ret; + ctrl->state = NVME_CTRL_NEW; + spin_lock_init(&ctrl->lock); INIT_LIST_HEAD(&ctrl->namespaces); mutex_init(&ctrl->namespaces_mutex); kref_init(&ctrl->kref); |