Re: [PATCH v5 3/7] vfio/pci: Disable INTx in vfio_realize error path

[Joao Martins]

On 30/06/2023 08:36, Zhenzhong Duan wrote:
> When vfio realize fails, INTx isn't disabled if it has been enabled.
> This may confuse host side with unhandled interrupt report.
> 
> Fixes: c5478fea27ac ("vfio/pci: Respond to KVM irqchip change notifier")
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>

Reviewed-by: Joao Martins <joao.m.martins@oracle.com>

> ---
>  hw/vfio/pci.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> index ab6645ba60af..31c4ab250fbe 100644
> --- a/hw/vfio/pci.c
> +++ b/hw/vfio/pci.c
> @@ -3220,6 +3220,9 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
>      return;
>  
>  out_deregister:
> +    if (vdev->interrupt == VFIO_INT_INTx) {
> +        vfio_intx_disable(vdev);
> +    }
>      pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
>      if (vdev->irqchip_change_notifier.notify) {
>          kvm_irqchip_remove_change_notifier(&vdev->irqchip_change_notifier);