mirror of https://gitee.com/openkylin/qemu.git
pci: Unregister BARs before device exit
BARs are registered in init functions from memory regions created by the drivers. Exit functions destroy those memory regions. By unregistering the io regions after exit(), we're calling memory_region_del_subregion on freed memory. Don't do that. The option rom comes along for the ride because it's more symmetric to how it's created. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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5
hw/pci.c
5
hw/pci.c
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@ -838,12 +838,13 @@ static int pci_unregister_device(DeviceState *dev)
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PCIDevice *pci_dev = PCI_DEVICE(dev);
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PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
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pci_unregister_io_regions(pci_dev);
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pci_del_option_rom(pci_dev);
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if (pc->exit) {
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pc->exit(pci_dev);
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}
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pci_unregister_io_regions(pci_dev);
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pci_del_option_rom(pci_dev);
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do_pci_unregister_device(pci_dev);
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return 0;
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}
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