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nvme-pci: Fix async probe remove race 

Ensure the controller is not in the NEW state when nvme_probe() exits.
This will always allow a subsequent nvme_remove() to set the state to
DELETING, fixing a potential race between the initial asynchronous probe
and device removal.

Reported-by: Li Zhong <lizhongfs@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
Keith Busch 2019-07-29 16:34:52 -06:00 committed by Sagi Grimberg
parent 0157ec8dad
commit bd46a90634
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/host/pci.c
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@ -2695,7 +2695,7 @@ static void nvme_async_probe(void *data, async_cookie_t cookie)
{
struct nvme_dev *dev = data;
nvme_reset_ctrl_sync(&dev->ctrl);
flush_work(&dev->ctrl.reset_work);
flush_work(&dev->ctrl.scan_work);
nvme_put_ctrl(&dev->ctrl);
}
@ -2761,6 +2761,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev));
nvme_reset_ctrl(&dev->ctrl);
nvme_get_ctrl(&dev->ctrl);
async_schedule(nvme_async_probe, dev);