qemu-kvm/kvm-vfio-pci-Disable-INTx-in-vfio_realize-error-path.patch

From 816c20b23546d31316c9ca450db8a6668ac6216c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Wed, 12 Jul 2023 17:46:57 +0200
Subject: [PATCH 25/37] vfio/pci: Disable INTx in vfio_realize error path
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RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 179: vfio: live migration support
RH-Bugzilla: 2192818
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [23/28] 2fde4bad00c4286e6bbe24947c2bfd6468fc0ff3 (clegoate/qemu-kvm-c9s)

Bugzilla: https://bugzilla.redhat.com/2192818

commit adee0da0368f
Author: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date:   Mon Jul 3 15:15:06 2023 +0800

    vfio/pci: Disable INTx in vfio_realize error path

    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>
    Reviewed-by: Cédric Le Goater <clg@redhat.com>
    Signed-off-by: Cédric Le Goater <clg@redhat.com>

Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/vfio/pci.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 87bd440504..2d059832a4 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3244,6 +3244,9 @@ 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);
-- 
2.39.3