[RFC PATCH] nvme: Ignore timeouts while a PCIe reset is pending

[kbusch@kernel.org (Keith Busch)]

On Thu, May 23, 2019@03:57:22PM -0600, Heitke, Kenneth wrote:
> On 5/22/2019 2:09 PM, Keith Busch wrote:
> > @@ -2782,12 +2783,13 @@ static void nvme_reset_prepare(struct pci_dev *pdev)
> >   {
> >   	struct nvme_dev *dev = pci_get_drvdata(pdev);
> >   	nvme_dev_disable(dev, false);
> > +	nvme_sync_queues(&dev->ctrl);
> >   }
> >   static void nvme_reset_done(struct pci_dev *pdev)
> >   {
> >   	struct nvme_dev *dev = pci_get_drvdata(pdev);
> > -	nvme_reset_ctrl_sync(&dev->ctrl);
> > +	nvme_reset_ctrl(&dev->ctrl);
> >   }
> >   static void nvme_shutdown(struct pci_dev *pdev)
> > --
> > 
> 
> For my specific case, is the sync_queues and reset_ctrl change needed as
> well?

I shouldn't have included the sync_queue part.

Definitely need the nvme_reset_ctrl change as blk_cfg_access is still
set here so need to reset asynchronously to unblock new timeouts.