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nvme: merge nvme_dev_start, nvme_dev_resume and nvme_async_probe 

And give the resulting function a sensible name.  This keeps all the
error handling in a single place and will allow for further improvements
to it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2015-10-03 09:49:23 +02:00 committed by Jens Axboe
parent 90667892c5
commit 3cf519b5a8
1 changed files with 20 additions and 33 deletions
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53
drivers/block/nvme-core.c
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@ -87,6 +87,7 @@ static struct class *nvme_class;
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;
@ -2949,14 +2950,15 @@ static const struct file_operations nvme_dev_fops = {
.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)
@ -2991,7 +2993,17 @@ static int nvme_dev_start(struct nvme_dev *dev)
goto free_tags;
dev->event_limit = 1;
return result;
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;
free_tags:
nvme_dev_remove_admin(dev);
@ -3003,7 +3015,9 @@ static int nvme_dev_start(struct nvme_dev *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)
@ -3017,24 +3031,6 @@ 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");
@ -3113,7 +3109,6 @@ static ssize_t nvme_sysfs_reset(struct device *dev,
}
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;
@ -3164,7 +3159,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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;
@ -3184,14 +3179,6 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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);