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From c424945b8ae8bbb6ce6aa6a9178b55b3b7498975 Mon Sep 17 00:00:00 2001
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From: Marcel Apfelbaum <marcel@redhat.com>
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Date: Thu, 18 Jan 2018 15:49:40 +0100
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Subject: [PATCH 07/21] hw/pci-bridge: fix QEMU crash because of pcie-root-port
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RH-Author: Marcel Apfelbaum <marcel@redhat.com>
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Message-id: <20180118154940.32815-1-marcel@redhat.com>
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Patchwork-id: 78666
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O-Subject: [RHEL-7.5 qemu-kvm-rhev PATCH] hw/pci-bridge: fix QEMU crash because of pcie-root-port
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Bugzilla: 1520858
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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If we try to use more pcie_root_ports then available slots
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and an IO hint is passed to the port, QEMU crashes because
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we try to init the "IO hint" capability even if the device
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is not created.
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Fix it by checking for error before adding the capability,
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so QEMU can fail gracefully.
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Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit fced4d00e68e7559c73746d963265f7fd0b6abf9)
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Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/pci-bridge/gen_pcie_root_port.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/hw/pci-bridge/gen_pcie_root_port.c b/hw/pci-bridge/gen_pcie_root_port.c
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index ad4e6aa..0e2f2e8 100644
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--- a/hw/pci-bridge/gen_pcie_root_port.c
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+++ b/hw/pci-bridge/gen_pcie_root_port.c
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@@ -74,8 +74,13 @@ static void gen_rp_realize(DeviceState *dev, Error **errp)
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PCIDevice *d = PCI_DEVICE(dev);
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GenPCIERootPort *grp = GEN_PCIE_ROOT_PORT(d);
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PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
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+ Error *local_err = NULL;
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- rpc->parent_realize(dev, errp);
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+ rpc->parent_realize(dev, &local_err);
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+ if (local_err) {
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+ error_propagate(errp, local_err);
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+ return;
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+ }
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int rc = pci_bridge_qemu_reserve_cap_init(d, 0, grp->bus_reserve,
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grp->io_reserve, grp->mem_reserve, grp->pref32_reserve,
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--
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1.8.3.1
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