Re: [PATCH v3 02/12] vfio/pci: Only check ownership of opened devices in hot reset

Jason Gunthorpe
2023-04-05T11:42:08Z

On Tue, Apr 04, 2023 at 05:59:01PM +0200, Eric Auger wrote:

> > but the hot reset shall fail as the group is not owned by the user.
>
> sure it shall but I fail to understand if the reset fails or the device
> plug is somehow delayed until the reset completes.

It is just racy today - vfio_pci_dev_set_resettable() doesn't hold any
locks across the pci_walk_bus() check to prevent hot plug in while it is
working on the reset.

Jason