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NVMe: Bring up cdev on set feature failure 

This patch creates the character device as long as a device's admin queues
are usable so a user has an opprotunity to perform administration tasks.
A device may be in a state that does not allow IO and setting the queue
count feature in such a state returns an error. Previously the driver
would bail and the controller would be unusable.

Signed-off-by: Keith Busch <keith.busch@intel.com>
This commit is contained in:
Keith Busch 2013-07-29 16:20:56 -06:00 committed by Matthew Wilcox
parent 1b56749e54
commit 7e03b12406
1 changed files with 2 additions and 2 deletions
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4
drivers/block/nvme-core.c
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@ -1664,7 +1664,7 @@ static int set_queue_count(struct nvme_dev *dev, int count)
status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0,
&result); &result);
if (status) if (status)
return -EIO; return status < 0 ? -EIO : -EBUSY;
return min(result & 0xffff, result >> 16) + 1; return min(result & 0xffff, result >> 16) + 1;
} }
@ -2018,7 +2018,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
spin_unlock(&dev_list_lock); spin_unlock(&dev_list_lock);
result = nvme_dev_add(dev); result = nvme_dev_add(dev);
if (result) if (result && result != -EBUSY)
goto delete; goto delete;
scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance);